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1 office 1 dnl Macros that test for specific features.
2 dnl This file is part of the Autoconf packaging for Wireshark.
3 dnl Copyright (C) 1998-2000 by Gerald Combs.
4 dnl
5 dnl This program is free software; you can redistribute it and/or modify
6 dnl it under the terms of the GNU General Public License as published by
7 dnl the Free Software Foundation; either version 2, or (at your option)
8 dnl any later version.
9 dnl
10 dnl This program is distributed in the hope that it will be useful,
11 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
12 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 dnl GNU General Public License for more details.
14 dnl
15 dnl You should have received a copy of the GNU General Public License
16 dnl along with this program; if not, write to the Free Software
17 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
18 dnl 02111-1307, USA.
19 dnl
20 dnl As a special exception, the Free Software Foundation gives unlimited
21 dnl permission to copy, distribute and modify the configure scripts that
22 dnl are the output of Autoconf. You need not follow the terms of the GNU
23 dnl General Public License when using or distributing such scripts, even
24 dnl though portions of the text of Autoconf appear in them. The GNU
25 dnl General Public License (GPL) does govern all other use of the material
26 dnl that constitutes the Autoconf program.
27 dnl
28 dnl Certain portions of the Autoconf source text are designed to be copied
29 dnl (in certain cases, depending on the input) into the output of
30 dnl Autoconf. We call these the "data" portions. The rest of the Autoconf
31 dnl source text consists of comments plus executable code that decides which
32 dnl of the data portions to output in any given case. We call these
33 dnl comments and executable code the "non-data" portions. Autoconf never
34 dnl copies any of the non-data portions into its output.
35 dnl
36 dnl This special exception to the GPL applies to versions of Autoconf
37 dnl released by the Free Software Foundation. When you make and
38 dnl distribute a modified version of Autoconf, you may extend this special
39 dnl exception to the GPL to apply to your modified version as well, *unless*
40 dnl your modified version has the potential to copy into its output some
41 dnl of the text that was the non-data portion of the version that you started
42 dnl with. (In other words, unless your change moves or copies text from
43 dnl the non-data portions to the data portions.) If your modification has
44 dnl such potential, you must delete any notice of this special exception
45 dnl to the GPL from your modified version.
46 dnl
47 dnl Written by David MacKenzie, with help from
48 dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
49 dnl Roland McGrath, Noah Friedman, david d zuhn, and many others.
50  
51 #
52 # AC_WIRESHARK_ADD_DASH_L
53 #
54 # Add to the variable specified as the first argument a "-L" flag for the
55 # directory specified as the second argument, and, on Solaris, add a
56 # "-R" flag for it as well.
57 #
58 # XXX - IRIX, and other OSes, may require some flag equivalent to
59 # "-R" here.
60 #
61 AC_DEFUN([AC_WIRESHARK_ADD_DASH_L],
62 [AX_APPEND_FLAG(-L$2, $1)
63 case "$host_os" in
64 solaris*)
65 AX_APPEND_FLAG(-R$2, $1)
66 ;;
67 esac
68 ])
69  
70 #
71 # AC_WIRESHARK_PUSH_FLAGS
72 #
73 # Push our flags to CFLAGS/etc.
74 #
75 AC_DEFUN([AC_WIRESHARK_PUSH_FLAGS],
76 [
77 ac_ws_CPPLAGS_saved="$CPPFLAGS"
78 ac_ws_CFLAGS_saved="$CFLAGS"
79 ac_ws_CXXFLAGS_saved="$CXXFLAGS"
80 ac_ws_LDFLAGS_saved="$LDFLAGS"
81 CPPFLAGS="$WS_CPPFLAGS $CPPFLAGS"
82 CFLAGS="$WS_CFLAGS $CFLAGS"
83 CXXFLAGS="$WS_CXXFLAGS $CXXFLAGS"
84 LDFLAGS="$WS_LDFLAGS $LDFLAGS"
85 ])
86  
87 #
88 # AC_WIRESHARK_POP_FLAGS
89 #
90 # Restore user build flags.
91 #
92 AC_DEFUN([AC_WIRESHARK_POP_FLAGS],
93 [
94 CPPFLAGS="$ac_ws_CPPLAGS_saved"
95 CFLAGS="$ac_ws_CFLAGS_saved"
96 CXXFLAGS="$ac_ws_CXXFLAGS_saved"
97 LDFLAGS="$ac_ws_LDFLAGS_saved"
98 ])
99  
100  
101 #
102 # AC_WIRESHARK_BREAKLOOP_TRY_LINK
103 #
104 AC_DEFUN([AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK],
105 [
106 AC_LINK_IFELSE(
107 [
108 AC_LANG_SOURCE(
109 [[
110 # include <pcap.h>
111 int main(void)
112 {
113 pcap_t *pct = NULL;
114 pcap_breakloop(pct);
115 return 0;
116 }
117 ]])
118 ],
119 [
120 ws_breakloop_compiled=yes
121 ],
122 [
123 ws_breakloop_compiled=no
124 ])
125 ])
126  
127  
128  
129 #
130 # AC_WIRESHARK_PCAP_CHECK
131 #
132 AC_DEFUN([AC_WIRESHARK_PCAP_CHECK],
133 [
134 AC_WIRESHARK_PUSH_FLAGS
135  
136 if test -z "$pcap_dir"
137 then
138 # Pcap header checks
139 # XXX need to set a var AC_CHECK_HEADER(pcap.h,,)
140  
141 #
142 # The user didn't specify a directory in which libpcap resides.
143 # First, look for a pcap-config script.
144 #
145 AC_PATH_TOOL(PCAP_CONFIG, pcap-config)
146  
147 if test -n "$PCAP_CONFIG" ; then
148 #
149 # Found it.
150 #
151 # Now check whether it's the libpcap 1.0 version, which
152 # put a space after "-L" - on some platforms, that doesn't
153 # work.
154 #
155 AC_MSG_CHECKING(for broken pcap-config)
156 case "`\"$PCAP_CONFIG\" --libs`" in
157  
158 "-L "*)
159 #
160 # Space after -L. Pretend pcap-config doesn't exist.
161 #
162 AC_MSG_RESULT(yes)
163 PCAP_CONFIG=""
164 ;;
165  
166 *)
167 #
168 # No space after -L.
169 #
170 AC_MSG_RESULT(no)
171 ;;
172 esac
173 fi
174 if test -n "$PCAP_CONFIG" ; then
175 #
176 # Found it, and it's usable; use it to get the include flags
177 # for libpcap.
178 #
179 CPPFLAGS="$CPPFLAGS `\"$PCAP_CONFIG\" --cflags`"
180 else
181 #
182 # Didn't find it; we have to look for libpcap ourselves.
183 # We assume that the current library search path will work,
184 # but we may have to look for the header in a "pcap"
185 # subdirectory of "/usr/include" or "/usr/local/include",
186 # as some systems apparently put "pcap.h" in a "pcap"
187 # subdirectory, and we also check "$prefix/include" - and
188 # "$prefix/include/pcap", in case $prefix is set to
189 # "/usr/include" or "/usr/local/include".
190 #
191 # XXX - should we just add "$prefix/include" to the include
192 # search path and "$prefix/lib" to the library search path?
193 #
194 AC_MSG_CHECKING(for extraneous pcap header directories)
195 found_pcap_dir=""
196 pcap_dir_list="/usr/local/include/pcap /usr/include/pcap $prefix/include/pcap $prefix/include"
197 for pcap_dir in $pcap_dir_list
198 do
199 if test -d $pcap_dir ; then
200 if test x$pcap_dir != x/usr/include -a x$pcap_dir != x/usr/local/include ; then
201 CPPFLAGS="$CPPFLAGS -I$pcap_dir"
202 fi
203 found_pcap_dir=" $found_pcap_dir -I$pcap_dir"
204 break
205 fi
206 done
207  
208 if test "$found_pcap_dir" != "" ; then
209 AC_MSG_RESULT(found --$found_pcap_dir added to CFLAGS)
210 else
211 AC_MSG_RESULT(not found)
212 fi
213 fi
214 else
215 #
216 # The user specified a directory in which libpcap resides,
217 # so add the "include" subdirectory of that directory to
218 # the include file search path and the "lib" subdirectory
219 # of that directory to the library search path.
220 #
221 # XXX - if there's also a libpcap in a directory that's
222 # already in CPPFLAGS or LDFLAGS, this won't make us find
223 # the version in the specified directory, as the compiler
224 # and/or linker will search that other directory before it
225 # searches the specified directory.
226 #
227 CPPFLAGS="$CPPFLAGS -I$pcap_dir/include"
228 AC_WIRESHARK_ADD_DASH_L(LDFLAGS, $pcap_dir/lib)
229 fi
230  
231 # Pcap header check
232 AC_CHECK_HEADER(pcap.h,,
233 AC_MSG_ERROR([[Header file pcap.h not found; if you installed libpcap
234 from source, did you also do \"make install-incl\", and if you installed a
235 binary package of libpcap, is there also a developer's package of libpcap,
236 and did you also install that package?]]))
237  
238 if test -n "$PCAP_CONFIG" ; then
239 #
240 # We have pcap-config; we assume that means we have libpcap
241 # installed and that pcap-config will tell us whatever
242 # libraries libpcap needs.
243 #
244 if test x$enable_static = xyes; then
245 PCAP_LIBS="`\"$PCAP_CONFIG\" --libs --static`"
246 else
247 PCAP_LIBS="`\"$PCAP_CONFIG\" --libs`"
248 fi
249 AC_DEFINE(HAVE_LIBPCAP, 1, [Define to use libpcap library])
250 else
251 #
252 # Check to see if we find "pcap_open_live" in "-lpcap".
253 # Also check for various additional libraries that libpcap might
254 # require.
255 #
256 AC_CHECK_LIB(pcap, pcap_open_live,
257 [
258 PCAP_LIBS=-lpcap
259 AC_DEFINE(HAVE_LIBPCAP, 1, [Define to use libpcap library])
260 ], [
261 ac_wireshark_extras_found=no
262 ac_save_LIBS="$LIBS"
263 for extras in "-lcfg -lodm" "-lpfring"
264 do
265 AC_MSG_CHECKING([for pcap_open_live in -lpcap with $extras])
266 LIBS="-lpcap $extras $ac_save_LIBS"
267 #
268 # XXX - can't we use AC_CHECK_LIB here?
269 #
270 AC_TRY_LINK(
271 [
272 # include <pcap.h>
273 ],
274 [
275 pcap_open_live(NULL, 0, 0, 0, NULL);
276 ],
277 [
278 ac_wireshark_extras_found=yes
279 AC_MSG_RESULT([yes])
280 PCAP_LIBS="-lpcap $extras"
281 AC_DEFINE(HAVE_LIBPCAP, 1, [Define to use libpcap library])
282 ],
283 [
284 AC_MSG_RESULT([no])
285 ])
286 if test x$ac_wireshark_extras_found = xyes
287 then
288 break
289 fi
290 done
291 if test x$ac_wireshark_extras_found = xno
292 then
293 AC_MSG_ERROR([Can't link with library libpcap.])
294 fi
295 LIBS=$ac_save_LIBS
296 ])
297 fi
298 AC_SUBST(PCAP_LIBS)
299  
300 #
301 # Check whether various variables and functions are defined by
302 # libpcap.
303 #
304 ac_save_LIBS="$LIBS"
305 LIBS="$PCAP_LIBS $LIBS"
306 AC_CHECK_FUNCS(pcap_open_dead pcap_freecode)
307 #
308 # pcap_breakloop may be present in the library but not declared
309 # in the pcap.h header file. If it's not declared in the header
310 # file, attempts to use it will get warnings, and, if we're
311 # building with warnings treated as errors, that warning will
312 # cause compilation to fail.
313 #
314 # We are therefore first testing whether the function is present
315 # and then, if we're compiling with warnings as errors, testing
316 # whether it is usable. It is usable if it compiles without
317 # a -Wimplicit warning (the "compile with warnings as errors"
318 # option requires GCC). If it is not usable, we fail and tell
319 # the user that the pcap.h header needs to be updated.
320 #
321 # Ceteris paribus, this should only happen with Mac OS X 10.3[.x] which
322 # can have an up-to-date pcap library without the corresponding pcap
323 # header.
324 #
325 # However, it might also happen on some others OSes with some erroneous
326 # system manipulations where multiple versions of libpcap might co-exist
327 # e.g. hand made symbolic link from libpcap.so -> libpcap.so.0.8 but
328 # having the pcap header version 0.7.
329 #
330 AC_MSG_CHECKING([whether pcap_breakloop is present])
331 ac_CFLAGS_saved="$CFLAGS"
332 AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK
333 if test "x$ws_breakloop_compiled" = "xyes"; then
334 AC_MSG_RESULT(yes)
335 AC_DEFINE(HAVE_PCAP_BREAKLOOP, 1, [Define if pcap_breakloop is known])
336 if test "x$with_warnings_as_errors" = "xyes"; then
337 AC_MSG_CHECKING([whether pcap_breakloop is usable])
338 CFLAGS="$CFLAGS -Werror -Wimplicit"
339 AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK
340 if test "x$ws_breakloop_compiled" = "xyes"; then
341 AC_MSG_RESULT(yes)
342 else
343 AC_MSG_RESULT(no)
344 AC_MSG_ERROR(
345 [Your pcap library is more recent than your pcap header.
346 As you are building with compiler warnings treated as errors, Wireshark
347 won't be able to use functions not declared in that header.
348 If you wish to build with compiler warnings treated as errors, You should
349 install a newer version of the header file.])
350 fi
351 CFLAGS="$ac_CFLAGS_saved"
352 fi
353 else
354 AC_MSG_RESULT(no)
355 fi
356  
357 #
358 # Later versions of Mac OS X 10.3[.x] ship a pcap.h that
359 # doesn't define pcap_if_t but ship an 0.8[.x] libpcap,
360 # so the library has "pcap_findalldevs()", but pcap.h
361 # doesn't define "pcap_if_t" so you can't actually *use*
362 # "pcap_findalldevs()".
363 #
364 # That even appears to be true of systems shipped with
365 # 10.3.4, so it doesn't appear only to be a case of
366 # Software Update not updating header files.
367 #
368 # (You can work around this by installing the 0.8 header
369 # files.)
370 #
371 AC_CACHE_CHECK([whether pcap_findalldevs is present and usable],
372 [ac_cv_func_pcap_findalldevs],
373 [
374 AC_LINK_IFELSE(
375 [
376 AC_LANG_SOURCE(
377 [[
378 #include <pcap.h>
379 main()
380 {
381 pcap_if_t *devpointer;
382 char errbuf[1];
383  
384 pcap_findalldevs(&devpointer, errbuf);
385 }
386 ]])
387 ],
388 [
389 ac_cv_func_pcap_findalldevs=yes
390 ],
391 [
392 ac_cv_func_pcap_findalldevs=no
393 ])
394 ])
395 #
396 # Don't check for other new routines that showed up after
397 # "pcap_findalldevs()" if we don't have a usable
398 # "pcap_findalldevs()", so we don't end up using them if the
399 # "pcap.h" is crufty and old and doesn't declare them.
400 #
401 if test $ac_cv_func_pcap_findalldevs = "yes" ; then
402 AC_DEFINE(HAVE_PCAP_FINDALLDEVS, 1,
403 [Define to 1 if you have the `pcap_findalldevs' function and a pcap.h that declares pcap_if_t.])
404 AC_CHECK_FUNCS(pcap_datalink_val_to_name pcap_datalink_name_to_val)
405 AC_CHECK_FUNCS(pcap_datalink_val_to_description)
406 AC_CHECK_FUNCS(pcap_list_datalinks pcap_set_datalink pcap_lib_version)
407 AC_CHECK_FUNCS(pcap_get_selectable_fd pcap_free_datalinks)
408 AC_CHECK_FUNC(pcap_create,
409 [
410 AC_DEFINE(HAVE_PCAP_CREATE, 1,
411 [Define to 1 if you have the `pcap_create' function.])
412 AC_DEFINE(CAN_SET_CAPTURE_BUFFER_SIZE, 1,
413 [Define to 1 if the capture buffer size can be set.])
414 ])
415 AC_CHECK_FUNCS(bpf_image pcap_set_tstamp_precision)
416 fi
417  
418 AC_WIRESHARK_POP_FLAGS
419 LIBS="$ac_save_LIBS"
420 ])
421  
422 AC_DEFUN([AC_WIRESHARK_PCAP_REMOTE_CHECK],
423 [
424 ac_save_LIBS="$LIBS"
425 LIBS="$PCAP_LIBS $LIBS"
426 AC_DEFINE(HAVE_REMOTE, 1, [Define to 1 to enable remote
427 capturing feature in WinPcap library])
428 AC_CHECK_FUNCS(pcap_open)
429 if test $ac_cv_func_pcap_open = "yes" ; then
430 AC_DEFINE(HAVE_PCAP_REMOTE, 1,
431 [Define to 1 if you have WinPcap remote capturing support and prefer to use these new API features.])
432 fi
433 AC_CHECK_FUNCS(pcap_setsampling)
434 LIBS="$ac_save_LIBS"
435 ])
436  
437 #
438 # AC_WIRESHARK_ZLIB_CHECK
439 #
440 AC_DEFUN([AC_WIRESHARK_ZLIB_CHECK],
441 [
442 AC_WIRESHARK_PUSH_FLAGS
443  
444 if test "x$zlib_dir" != "x"
445 then
446 #
447 # The user specified a directory in which zlib resides,
448 # so add the "include" subdirectory of that directory to
449 # the include file search path and the "lib" subdirectory
450 # of that directory to the library search path.
451 #
452 # XXX - if there's also a zlib in a directory that's
453 # already in CPPFLAGS or LDFLAGS, this won't make us find
454 # the version in the specified directory, as the compiler
455 # and/or linker will search that other directory before it
456 # searches the specified directory.
457 #
458 CPPFLAGS="$CPPFLAGS -I$zlib_dir/include"
459 AC_WIRESHARK_ADD_DASH_L(LDFLAGS, $zlib_dir/lib)
460 fi
461  
462 #
463 # Make sure we have "zlib.h". If we don't, it means we probably
464 # don't have zlib, so don't use it.
465 #
466 AC_CHECK_HEADER(zlib.h,,
467 [
468 if test "x$zlib_dir" != "x"
469 then
470 #
471 # The user used "--with-zlib=" to specify a directory
472 # containing zlib, but we didn't find the header file
473 # there; that either means they didn't specify the
474 # right directory or are confused about whether zlib
475 # is, in fact, installed. Report the error and give up.
476 #
477 AC_MSG_ERROR([zlib header not found in directory specified in --with-zlib])
478 else
479 if test "x$want_zlib" = "xyes"
480 then
481 #
482 # The user tried to force us to use the library, but we
483 # couldn't find the header file; report an error.
484 #
485 AC_MSG_ERROR(Header file zlib.h not found.)
486 else
487 #
488 # We couldn't find the header file; don't use the
489 # library, as it's probably not present.
490 #
491 want_zlib=no
492 fi
493 fi
494 ])
495  
496 if test "x$want_zlib" != "xno"
497 then
498 #
499 # Well, we at least have the zlib header file.
500 # We link with zlib to support uncompression of
501 # gzipped network traffic, e.g. in an HTTP request
502 # or response body.
503 #
504 if test "x$zlib_dir" != "x"
505 then
506 WS_CPPFLAGS="$WS_CPPFLAGS -I$zlib_dir/include"
507 AC_WIRESHARK_ADD_DASH_L(WS_LDFLAGS, $zlib_dir/lib)
508 fi
509 LIBS="-lz $LIBS"
510 AC_DEFINE(HAVE_ZLIB, 1, [Define to use zlib library])
511 #
512 # Check for "inflatePrime()" in zlib, which we need
513 # in order to read compressed capture files.
514 #
515 AC_CHECK_FUNCS(inflatePrime)
516  
517 if test "x$ac_cv_func_inflatePrime" = "xyes" ; then
518 #
519 # Now check for "inflatePrime()" in zlib when
520 # linking with the linker flags for GTK+
521 # applications; people often grab XFree86 source
522 # and build and install it on their systems,
523 # and they appear sometimes to misconfigure
524 # XFree86 so that, even on systems with zlib,
525 # it assumes there is no zlib, so the XFree86
526 # build process builds and installs its
527 # own zlib in the X11 library directory.
528 #
529 # The zlib in at least some versions of XFree86
530 # is an older version that may lack "inflatePrime()",
531 # and that's the zlib with which Wireshark gets
532 # linked, so the build of Wireshark fails.
533 #
534 AC_MSG_CHECKING([for inflatePrime missing when linking with X11])
535 AC_TRY_LINK_FUNC(inflatePrime, AC_MSG_RESULT(no),
536 [
537 AC_MSG_RESULT(yes)
538 AC_MSG_ERROR(old zlib found when linking with X11 - get rid of old zlib.)
539 ])
540 fi
541 fi
542  
543 AC_WIRESHARK_POP_FLAGS
544 ])
545  
546 #
547 # AC_WIRESHARK_LIBLUA_CHECK
548 #
549 # Sets $have_lua to yes or no.
550 # If it's yes, it also sets $LUA_CFLAGS and $LUA_LIBS.
551 AC_DEFUN([AC_WIRESHARK_LIBLUA_CHECK],[
552  
553 AC_WIRESHARK_PUSH_FLAGS
554  
555 if test "x$want_lua_dir" = "x"
556 then
557 # The user didn't tell us where to find Lua. Let's go look for it.
558  
559 # First, try the standard (pkg-config) way.
560 # Unfortunately Lua's pkg-config file isn't standardly named.
561 # Some distributions allow installation of multiple versions of
562 # Lua at the same time. On such systems each version has its
563 # own package name.
564 #
565 # We use a for loop instead of giving all the package names to
566 # PKG_CHECK_MODULES because doing the latter doesn't appear to
567 # work reliably (some package names are not searched for).
568 for pkg in "lua < 5.3" lua5.2 lua-5.2 lua52 lua5.1 lua-5.1 lua51 lua5.0 lua-5.0 lua50
569 do
570 AC_MSG_CHECKING(if you have $pkg)
571 PKG_CHECK_EXISTS($pkg,
572 [
573 AC_MSG_RESULT(yes)
574 have_lua=yes
575 ],
576 [
577 AC_MSG_RESULT(no)
578 ])
579  
580 if test "x$have_lua" = "xyes"
581 then
582 PKG_WIRESHARK_CHECK_SYSTEM_MODULES(LUA, $pkg)
583 CPPFLAGS="$LUA_CFLAGS $CPPFLAGS"
584 AC_CHECK_HEADERS(lua.h lualib.h lauxlib.h)
585 break
586 fi
587 done
588 fi
589  
590 if test "x$have_lua" != "xyes"
591 then
592 # We don't have pkg-config or the user specified the path to
593 # Lua (in $want_lua_dir).
594 # Let's look for the header file.
595  
596 AC_MSG_CHECKING(for the location of lua.h)
597 if test "x$want_lua_dir" = "x"
598 then
599 # The user didn't tell us where to look so we'll look in some
600 # standard locations.
601 want_lua_dir="/usr/local /usr $prefix"
602 fi
603 for dir in $want_lua_dir
604 do
605 if test -r "$dir/include/lua.h"
606 then
607 header_dir="$dir/include"
608 lua_dir=$dir
609 break
610 fi
611  
612 for ver in 5.2 52 5.1 51 5.0 50
613 do
614 if test -r "$dir/include/lua$ver/lua.h"
615 then
616 header_dir="$dir/include/lua$ver"
617 lua_dir=$dir
618 break
619 fi
620 done
621 done
622  
623 if test "x$header_dir" = "x"
624 then
625 have_lua=no
626 AC_MSG_RESULT(not found)
627 else
628 AC_MSG_RESULT($header_dir)
629  
630 AC_MSG_CHECKING(the Lua version)
631 lua_ver=`$AWK AS_ESCAPE('/LUA_VERSION_NUM/ { print $NF; }' $header_dir/lua.h | sed 's/0/./')`
632  
633 if test "x$lua_ver" = "x5.3"
634 then
635 # Wireshark doesn't compile with Lua 5.3 today
636 AC_MSG_RESULT($lua_ver - disabling Lua support)
637 have_lua=no
638 else
639 AC_MSG_RESULT($lua_ver)
640  
641 CPPFLAGS="$CPPFLAGS -I$header_dir"
642 AC_CHECK_HEADERS(lua.h lualib.h lauxlib.h, ,
643 [
644 have_lua=no
645 ])
646 fi
647  
648 if test "x$have_lua" = "x"
649 then
650 # Set LUA_CFLAGS
651 LUA_CFLAGS="-I$header_dir"
652  
653 # We have the header files and they work. Now let's check if we
654 # have the library and it works.
655 #
656 # XXX - if there's also a liblua in a directory that's
657 # already in CPPFLAGS or LDFLAGS, this won't make us find
658 # the version in the specified directory, as the compiler
659 # and/or linker will search that other directory before it
660 # searches the specified directory.
661 #
662 # XXX - lib64?
663 LDFLAGS="-L$lua_dir/lib $LDFLAGS"
664 AC_SEARCH_LIBS(luaL_openlibs, [lua-${lua_ver} lua${lua_ver} lua],
665 [
666 LUA_LIBS="-L$lua_dir/lib $ac_cv_search_luaL_openlibs -lm"
667 have_lua=yes
668 ],[
669 have_lua=no
670 ], -lm)
671 fi
672 fi
673 fi
674  
675 AC_WIRESHARK_POP_FLAGS
676 ])
677  
678 #
679 # AC_WIRESHARK_LIBPORTAUDIO_CHECK
680 #
681 AC_DEFUN([AC_WIRESHARK_LIBPORTAUDIO_CHECK],[
682  
683 AC_WIRESHARK_PUSH_FLAGS
684 wireshark_save_LIBS="$LIBS"
685  
686 if test "x$portaudio_dir" != "x"
687 then
688 #
689 # The user specified a directory in which libportaudio
690 # resides, so add the "include" subdirectory of that directory to
691 # the include file search path and the "lib" subdirectory
692 # of that directory to the library search path.
693 #
694 # XXX - if there's also a libportaudio in a directory that's
695 # already in CPPFLAGS or LDFLAGS, this won't make us find
696 # the version in the specified directory, as the compiler
697 # and/or linker will search that other directory before it
698 # searches the specified directory.
699 #
700 CPPFLAGS="$CPPFLAGS -I$portaudio_dir/include"
701 LDFLAGS="$LDFLAGS -L$portaudio_dir/lib"
702 fi
703 LIBS="-lportaudio $LIBS"
704  
705 #
706 # Make sure we have "portaudio.h". If we don't, it means we probably
707 # don't have libportaudio, so don't use it.
708 #
709 AC_CHECK_HEADERS(portaudio.h,,
710 [
711 if test "x$portaudio_dir" != "x"
712 then
713 #
714 # The user used "--with-portaudio=" to specify a directory
715 # containing libportaudio, but we didn't find the header file
716 # there; that either means they didn't specify the
717 # right directory or are confused about whether libportaudio
718 # is, in fact, installed. Report the error and give up.
719 #
720 AC_MSG_ERROR([libportaudio header not found in directory specified in --with-portaudio])
721 else
722 if test "x$want_portaudio" = "xyes"
723 then
724 #
725 # The user tried to force us to use the library, but we
726 # couldn't find the header file; report an error.
727 #
728 AC_MSG_ERROR(Header file portaudio.h not found.)
729 else
730 #
731 # We couldn't find the header file; don't use the
732 # library, as it's probably not present.
733 #
734 want_portaudio=no
735 fi
736 fi
737 ])
738  
739 #
740 # Check whether we have the right version of portaudio
741 #
742 if test "x$want_portaudio" != "xno"
743 then
744 AC_CHECK_TYPE(PortAudioStream,
745 AC_DEFINE(PORTAUDIO_API_1, 1, [Define if we are using version of of the Portaudio library API]),
746 ,
747 [#include <portaudio.h>])
748 fi
749  
750 if test "x$want_portaudio" != "xno"
751 then
752 #
753 # Well, we at least have the portaudio header file.
754 #
755 # let's check if the libs are there
756 #
757 PORTAUDIO_LIBS=""
758 PORTAUDIO_INCLUDES=""
759  
760 AC_CHECK_LIB(portaudio, Pa_Initialize,
761 [
762 if test "x$portaudio_dir" != "x"
763 then
764 #
765 # Put the "-I" and "-L" flags for portaudio
766 # into PORTAUDIO_INCLUDES and PORTAUDIO_LIBS,
767 # respectively.
768 #
769 PORTAUDIO_LIBS="-L$portaudio_dir/lib -lportaudio"
770 PORTAUDIO_INCLUDES="-I$portaudio_dir/include"
771 else
772 PORTAUDIO_LIBS="-lportaudio"
773 fi
774 AC_DEFINE(HAVE_LIBPORTAUDIO, 1, [Define to use libportaudio library])
775 want_portaudio=yes
776 ],[
777 # User requested --with-portaudio but it isn't available
778 if test "x$want_portaudio" = "xyes"
779 then
780 AC_MSG_ERROR(Linking with libportaudio failed.)
781 fi
782 want_portaudio=no
783 ])
784 AC_SUBST(PORTAUDIO_LIBS)
785 AC_SUBST(PORTAUDIO_INCLUDES)
786  
787 fi
788  
789 LIBS="$wireshark_save_LIBS"
790 AC_WIRESHARK_POP_FLAGS
791 ])
792  
793  
794 #
795 # AC_WIRESHARK_C_ARES_CHECK
796 #
797 AC_DEFUN([AC_WIRESHARK_C_ARES_CHECK],
798 [
799 want_c_ares=defaultyes
800  
801 if test "x$want_c_ares" = "xdefaultyes"; then
802 want_c_ares=yes
803 fi
804  
805 if test "x$want_c_ares" = "xyes"; then
806 AC_CHECK_LIB(cares, ares_init,
807 [
808 C_ARES_LIBS=-lcares
809 AC_DEFINE(HAVE_C_ARES, 1, [Define to use c-ares library])
810 have_good_c_ares=yes
811 ])
812 else
813 AC_MSG_RESULT(not required)
814 fi
815 ])
816  
817  
818 #
819 # AC_WIRESHARK_LIBCAP_CHECK
820 #
821 AC_DEFUN([AC_WIRESHARK_LIBCAP_CHECK],
822 [
823 want_libcap=defaultyes
824  
825 if test "x$want_libcap" = "xdefaultyes"; then
826 want_libcap=yes
827 fi
828  
829 if test "x$want_libcap" = "xyes"; then
830 AC_CHECK_LIB(cap, cap_set_flag,
831 [
832 LIBCAP_LIBS=-lcap
833 AC_DEFINE(HAVE_LIBCAP, 1, [Define to use the libcap library])
834 have_good_libcap=yes
835 ],,
836 )
837 else
838 AC_MSG_RESULT(not required)
839 fi
840 ])
841  
842  
843 #
844 # AC_WIRESHARK_KRB5_CHECK
845 #
846 AC_DEFUN([AC_WIRESHARK_KRB5_CHECK],
847 [
848 AC_WIRESHARK_PUSH_FLAGS
849 wireshark_save_LIBS="$LIBS"
850  
851 if test "x$krb5_dir" != "x"
852 then
853 #
854 # The user specified a directory in which kerberos resides,
855 # so add the "include" subdirectory of that directory to
856 # the include file search path and the "lib" subdirectory
857 # of that directory to the library search path.
858 #
859 # XXX - if there's also a kerberos in a directory that's
860 # already in CPPFLAGS or LDFLAGS, this won't make us find
861 # the version in the specified directory, as the compiler
862 # and/or linker will search that other directory before it
863 # searches the specified directory.
864 #
865 KRB5_CFLAGS="-I$krb5_dir/include"
866 ac_heimdal_version=`grep heimdal $krb5_dir/include/krb5.h | head -n 1 | sed 's/^.*heimdal.*$/HEIMDAL/'`
867 # MIT Kerberos moved krb5.h to krb5/krb5.h starting with release 1.5
868 ac_mit_version_olddir=`grep 'Massachusetts' $krb5_dir/include/krb5.h | head -n 1 | sed 's/^.*Massachusetts.*$/MIT/'`
869 ac_mit_version_newdir=`grep 'Massachusetts' $krb5_dir/include/krb5/krb5.h | head -n 1 | sed 's/^.*Massachusetts.*$/MIT/'`
870 ac_krb5_version="$ac_heimdal_version$ac_mit_version_olddir$ac_mit_version_newdir"
871 if test "x$ac_krb5_version" = "xHEIMDAL"
872 then
873 KRB5_LIBS="-L$krb5_dir/lib -lkrb5 -lasn1 $SSL_LIBS -lroken -lcrypt"
874 else
875 KRB5_LIBS="-L$krb5_dir/lib -lkrb5 -lk5crypto -lcom_err"
876 fi
877 if test "x$ac_krb5_version" = "xMIT"
878 then
879 AC_DEFINE(HAVE_MIT_KERBEROS, 1, [Define to use MIT kerberos])
880 fi
881 else
882 AC_PATH_TOOL(KRB5_CONFIG, krb5-config)
883 if test -x "$KRB5_CONFIG"
884 then
885 KRB5_CFLAGS=`"$KRB5_CONFIG" --cflags`
886 KRB5_LIBS=`"$KRB5_CONFIG" --libs`
887 #
888 # If -lcrypto is in KRB5_FLAGS, we require it to build
889 # with Heimdal/MIT. We don't want to built with it by
890 # default, due to annoying license incompatibilities
891 # between the OpenSSL license and the GPL, so:
892 #
893 # if SSL_LIBS is set to a non-empty string, we
894 # remove -lcrypto from KRB5_LIBS and replace
895 # it with SSL_LIBS;
896 #
897 # if SSL_LIBS is not set to a non-empty string
898 # we fail with an appropriate error message.
899 #
900 case "$KRB5_LIBS" in
901 *-lcrypto*)
902 if test ! -z "$SSL_LIBS"
903 then
904 KRB5_LIBS=`echo $KRB5_LIBS | sed 's/-lcrypto//'`
905 KRB5_LIBS="$KRB5_LIBS $SSL_LIBS"
906 else
907 AC_MSG_ERROR([Kerberos library requires -lcrypto, so you must specify --with-ssl])
908 fi
909 ;;
910 esac
911 ac_krb5_version=`"$KRB5_CONFIG" --version | head -n 1 | sed -e 's/^.*heimdal.*$/HEIMDAL/' -e 's/^Kerberos .*$/MIT/' -e 's/^Solaris Kerberos .*$/MIT/'`
912 fi
913 fi
914  
915 CPPFLAGS="$CPPFLAGS $KRB5_CFLAGS"
916  
917 #
918 # Make sure we have "krb5.h". If we don't, it means we probably
919 # don't have kerberos, so don't use it.
920 #
921 AC_CHECK_HEADER(krb5.h,,
922 [
923 if test "x$krb5_dir" != "x"
924 then
925 #
926 # The user used "--with-krb5=" to specify a directory
927 # containing kerberos, but we didn't find the header file
928 # there; that either means they didn't specify the
929 # right directory or are confused about whether kerberos
930 # is, in fact, installed. Report the error and give up.
931 #
932 AC_MSG_ERROR([kerberos header not found in directory specified in --with-krb5])
933 else
934 if test "x$want_krb5" = "xyes"
935 then
936 #
937 # The user tried to force us to use the library, but we
938 # couldn't find the header file; report an error.
939 #
940 AC_MSG_ERROR(Header file krb5.h not found.)
941 else
942 #
943 # We couldn't find the header file; don't use the
944 # library, as it's probably not present.
945 #
946 KRB5_CFLAGS=""
947 KRB5_LIBS=""
948 want_krb5=no
949 AC_MSG_RESULT(No Heimdal or MIT header found - disabling dissection for some kerberos data in packet decoding)
950 fi
951 fi
952 ])
953  
954 if test "x$want_krb5" != "xno"
955 then
956 #
957 # Well, we at least have the krb5 header file.
958 # Check whether this is Heimdal or MIT.
959 #
960 AC_MSG_CHECKING(whether the Kerberos library is Heimdal or MIT)
961 if test "x$ac_krb5_version" = "xHEIMDAL" -o "x$ac_krb5_version" = "xMIT"
962 then
963 #
964 # Yes.
965 # Check whether we have krb5_kt_resolve - and whether
966 # we need to link with -lresolv when linking with
967 # the Kerberos library.
968 #
969 AC_MSG_RESULT($ac_krb5_version)
970 found_krb5_kt_resolve=no
971 for extras in "" "-lresolv"
972 do
973 LIBS="$KRB5_LIBS $extras $wireshark_save_LIBS"
974 if test -z "$extras"
975 then
976 AC_MSG_CHECKING([whether $ac_krb5_version includes krb5_kt_resolve])
977 else
978 AC_MSG_CHECKING([whether $ac_krb5_version includes krb5_kt_resolve (linking with $extras)])
979 fi
980 AC_TRY_LINK(
981 [
982 ],
983 [
984 krb5_kt_resolve();
985 ],
986 [
987 #
988 # We found "krb5_kt_resolve()".
989 #
990 AC_MSG_RESULT(yes)
991 if test -n "$extras"; then
992 KRB5_LIBS="$KRB5_LIBS $extras"
993 fi
994 AC_DEFINE(HAVE_KERBEROS, 1, [Define to use kerberos])
995 if test "x$ac_krb5_version" = "xHEIMDAL"
996 then
997 AC_DEFINE(HAVE_HEIMDAL_KERBEROS, 1, [Define to use heimdal kerberos])
998 elif test "x$ac_krb5_version" = "xMIT"
999 then
1000 AC_DEFINE(HAVE_MIT_KERBEROS, 1, [Define to use MIT kerberos])
1001 fi
1002 found_krb5_kt_resolve=yes
1003 break
1004 ],
1005 [
1006 AC_MSG_RESULT(no)
1007 ])
1008 done
1009 if test "$found_krb5_kt_resolve" = no
1010 then
1011 #
1012 # We didn't find "krb5_kt_resolve()" in the
1013 # Kerberos library, even when we tried linking
1014 # with -lresolv; we can't link with kerberos.
1015 #
1016 if test "x$want_krb5" = "xyes"
1017 then
1018 #
1019 # The user tried to force us to use the library,
1020 # but we can't do so; report an error.
1021 #
1022 AC_MSG_ERROR(Usable $ac_krb5_version not found)
1023 else
1024 #
1025 # Don't use
1026 #
1027 AC_MSG_RESULT(Usable $ac_krb5_version not found - disabling dissection for some kerberos data in packet decoding)
1028 KRB5_CFLAGS=""
1029 KRB5_LIBS=""
1030 want_krb5=no
1031 fi
1032 else
1033 #
1034 # We can link with Kerberos; see whether krb5.h
1035 # defines KEYTYPE_ARCFOUR_56 (where "defines" means
1036 # "as a #define or as an enum member).
1037 #
1038 AC_MSG_CHECKING([whether krb5.h defines KEYTYPE_ARCFOUR_56])
1039 AC_COMPILE_IFELSE(
1040 [
1041 AC_LANG_SOURCE(
1042 [[
1043 #include <krb5.h>
1044 #include <stdio.h>
1045  
1046 main()
1047 {
1048 printf("%u\n", KEYTYPE_ARCFOUR_56);
1049 }
1050 ]])
1051 ],
1052 [
1053 AC_MSG_RESULT(yes)
1054 AC_DEFINE(HAVE_KEYTYPE_ARCFOUR_56, 1, [Define if krb5.h defines KEYTYPE_ARCFOUR_56])
1055 ],
1056 [
1057 AC_MSG_RESULT(no)
1058 ])
1059 fi
1060 else
1061 #
1062 # It's not Heimdal or MIT.
1063 #
1064 AC_MSG_RESULT(no)
1065 if test "x$want_krb5" = "xyes"
1066 then
1067 #
1068 # The user tried to force us to use the library,
1069 # but we can't do so; report an error.
1070 #
1071 AC_MSG_ERROR(Kerberos not found)
1072 else
1073 #
1074 # Don't use.
1075 #
1076 AC_MSG_RESULT(Kerberos not found - disabling dissection for some kerberos data in packet decoding)
1077 KRB5_CFLAGS=""
1078 KRB5_LIBS=""
1079 want_krb5=no
1080 fi
1081 fi
1082 else
1083 #
1084 # The user asked us not to use Kerberos, or they didn't
1085 # say whether they wanted us to use it but we found
1086 # that we couldn't.
1087 #
1088 KRB5_CFLAGS=""
1089 KRB5_LIBS=""
1090 want_krb5=no
1091 fi
1092 AC_SUBST(KRB5_CFLAGS)
1093 AC_SUBST(KRB5_LIBS)
1094  
1095 LIBS="$wireshark_save_LIBS"
1096 AC_WIRESHARK_POP_FLAGS
1097 ])
1098  
1099 #
1100 # AC_WIRESHARK_GEOIP_CHECK
1101 #
1102 AC_DEFUN([AC_WIRESHARK_GEOIP_CHECK],
1103 [
1104 want_geoip=defaultyes
1105  
1106 if test "x$want_geoip" = "xdefaultyes"; then
1107 want_geoip=yes
1108 fi
1109  
1110 if test "x$want_geoip" = "xyes"; then
1111 AC_CHECK_LIB(GeoIP, GeoIP_new,
1112 [
1113 GEOIP_LIBS=-lGeoIP
1114 AC_DEFINE(HAVE_GEOIP, 1, [Define to use GeoIP library])
1115 have_good_geoip=yes
1116 ],,
1117 )
1118 if test "x$have_good_geoip" = "xyes"; then
1119 AC_CHECK_LIB(GeoIP, GeoIP_country_name_by_ipnum_v6,
1120 [
1121 AC_DEFINE(HAVE_GEOIP_V6, 1, [Define if GeoIP supports IPv6 (GeoIP 1.4.5 and later)])
1122 ],,
1123 )
1124 fi
1125 else
1126 AC_MSG_RESULT(not required)
1127 fi
1128 ])
1129  
1130 #
1131 # AC_WIRESHARK_LIBSSH_CHECK
1132 #
1133 AC_DEFUN([AC_WIRESHARK_LIBSSH_CHECK],
1134 [
1135 want_libssh=defaultyes
1136  
1137 if test "x$want_libssh" = "xdefaultyes"; then
1138 want_libssh=yes
1139 fi
1140  
1141 if test "x$want_libssh" = "xyes"; then
1142 AC_CHECK_LIB(ssh, ssh_new,
1143 [
1144 LIBSSH_LIBS=-lssh
1145 AC_DEFINE(HAVE_LIBSSH, 1, [Define to use libssh library])
1146 have_good_libssh=yes
1147 ],,
1148 )
1149 AC_MSG_CHECKING([whether libssh >= 0.6.0 for sshdump, ciscodump])
1150 PKG_CHECK_EXISTS([libssh >= 0.6.0],
1151 [
1152 AC_MSG_RESULT(yes)
1153 AC_DEFINE(HAVE_LIBSSH_POINTSIX, 1, [Defined if libssh >= 0.6.0])
1154 have_libssh_pointsix=yes
1155 ],
1156 [AC_MSG_RESULT(no)]
1157 )
1158 if test "x$have_libssh_pointsix" = "xyes"; then
1159 # ssh_userauth_agent exists only >= 0.6.0, but not on Windows
1160 # so check explicitly
1161 AC_CHECK_LIB(ssh, ssh_userauth_agent,
1162 [
1163 AC_DEFINE(HAVE_SSH_USERAUTH_AGENT, 1, [Libssh library has ssh_userauth_agent])
1164 have_ssh_userauth_agent=yes
1165 ],,
1166 )
1167 fi
1168 else
1169 AC_MSG_RESULT(not required)
1170 fi
1171 ])
1172  
1173 #AC_WIRESHARK_LDFLAGS_CHECK
1174 #
1175 # $1 : ldflag(s) to test
1176 #
1177 # We attempt to compile and link a test program with the specified linker
1178 # flag. The defined flag is added to LDFLAGS only if the link succeeds.
1179 #
1180 AC_DEFUN([AC_WIRESHARK_LDFLAGS_CHECK],
1181 [LD_OPTION="$1"
1182 AC_MSG_CHECKING(whether we can add $LD_OPTION to LDFLAGS)
1183 AC_WIRESHARK_PUSH_FLAGS
1184 LDFLAGS="$LDFLAGS $LD_OPTION"
1185 can_add_to_ldflags=""
1186 AC_LINK_IFELSE(
1187 [
1188 AC_LANG_SOURCE([[main() { return; }]])
1189 ],
1190 [
1191 AC_MSG_RESULT(yes)
1192 AX_APPEND_FLAG([$LD_OPTION], [WS_LDFLAGS])
1193 can_add_to_ldflags=yes
1194 ],
1195 [
1196 AC_MSG_RESULT(no)
1197 can_add_to_ldflags=no
1198 ])
1199 AC_WIRESHARK_POP_FLAGS
1200 ])
1201  
1202 dnl
1203 dnl Check whether, if you pass an unknown warning option to the
1204 dnl compiler, it fails or just prints a warning message and succeeds.
1205 dnl Set ac_wireshark_unknown_warning_option_error to the appropriate flag
1206 dnl to force an error if it would otherwise just print a warning message
1207 dnl and succeed.
1208 dnl
1209 AC_DEFUN([AC_WIRESHARK_CHECK_UNKNOWN_WARNING_OPTION_ERROR],
1210 [
1211 AC_MSG_CHECKING([whether the compiler fails when given an unknown warning option])
1212 AC_WIRESHARK_PUSH_FLAGS
1213 CFLAGS="$CFLAGS -Wxyzzy-this-will-never-succeed-xyzzy"
1214 AC_TRY_COMPILE(
1215 [],
1216 [return 0],
1217 [
1218 AC_MSG_RESULT([no, adding -Werror=unknown-warning-option])
1219 #
1220 # We're assuming this is clang, where
1221 # -Werror=unknown-warning-option is the appropriate
1222 # option to force the compiler to fail.
1223 #
1224 ac_wireshark_unknown_warning_option_error="-Werror=unknown-warning-option"
1225 ],
1226 [
1227 AC_MSG_RESULT([yes])
1228 ])
1229 AC_WIRESHARK_POP_FLAGS
1230 ])
1231  
1232 dnl
1233 dnl Check whether, if you pass a valid-for-C-but-not-C++ option to the
1234 dnl compiler, it fails or just prints a warning message and succeeds.
1235 dnl Set ac_wireshark_non_cxx_warning_option_error to the appropriate flag
1236 dnl to force an error if it would otherwise just print a warning message
1237 dnl and succeed.
1238 dnl
1239 AC_DEFUN([AC_WIRESHARK_CHECK_NON_CXX_WARNING_OPTION_ERROR],
1240 [
1241 AC_MSG_CHECKING([whether the compiler fails when given an warning option not supported for C++])
1242 #
1243 # Some C+ compilers warn about -Wmissing-prototypes, and some warn
1244 # about -Wmissing-declarations. Check both.
1245 #
1246 AC_LANG_PUSH(C++)
1247 AC_WIRESHARK_PUSH_FLAGS
1248 save_CXXFLAGS="$CXXFLAGS"
1249 for flag in -Wmissing-prototypes -Wmissing-declarations; do
1250 CXXFLAGS="$save_CXXFLAGS $flag"
1251 AC_TRY_COMPILE(
1252 [],
1253 [return 0],
1254 [
1255 #
1256 # We're assuming this is g++, where -Werror is the
1257 # appropriate option to force the compiler to fail.
1258 # Check whether it fails with -Werror.
1259 #
1260 # NOTE: it's important to put -Werror *before*
1261 # the flag, otherwise, when it sees the flag,
1262 # it doesn't yet know that warnings should be
1263 # treated as errors, and doesn't treat the
1264 # "that's C-only" warning as an error.
1265 #
1266 CXXFLAGS="$save_CXXFLAGS -Werror $flag"
1267 AC_TRY_COMPILE(
1268 [],
1269 [return 0],
1270 [
1271 #
1272 # No, so this option is actually OK
1273 # with our C++ compiler.
1274 #
1275 # (We need an empty command here to
1276 # prevent some versions of autoconf
1277 # from generating a script with an
1278 # empty "then" clause for an if statement.)
1279 #
1280 :
1281 ],
1282 [
1283 #
1284 # Yes, so we need -Werror for the tests.
1285 #
1286 ac_wireshark_non_cxx_warning_option_error="-Werror"
1287 break
1288 ])
1289 ])
1290 done
1291 AC_WIRESHARK_POP_FLAGS
1292 AC_LANG_POP
1293 if test x$ac_wireshark_non_cxx_warning_option_error = x; then
1294 AC_MSG_RESULT([yes])
1295 else
1296 AC_MSG_RESULT([no, adding -Werror])
1297 fi
1298 ])
1299  
1300 #
1301 # AC_WIRESHARK_COMPILER_FLAGS_CHECK
1302 #
1303 # $1 : flags to test
1304 # $2 : if supplied, C for C-only flags, CXX for C++-only flags
1305 # $3 : if supplied, a program to try to compile with the flag
1306 # and, if the compile fails when -Werror is turned on,
1307 # we don't add the flag - used for warning flags that
1308 # issue incorrect or non-useful warnings with some
1309 # compiler versions
1310 # $4 : must be supplied if $3 is supplied - a message describing
1311 # for what the test program is testing
1312 #
1313 # The macro first determines if the compiler supports GCC-style flags.
1314 # Then it attempts to compile with the defined cflags. The defined
1315 # flags are added to WS_CHECKED_CFLAGS only if the compilation succeeds.
1316 # CFLAGS remains unchanged. can_add_to_cflags is set to "no" when the
1317 # flag is checked but unavailable. (Like-wise for CXXFLAGS.)
1318 #
1319 # We do this because not all such options are necessarily supported by
1320 # the version of the particular compiler we're using.
1321 #
1322 AC_DEFUN([AC_WIRESHARK_COMPILER_FLAGS_CHECK],
1323 [GCC_OPTION="$1"
1324 can_add_to_cflags=""
1325 can_add_to_cxxflags=""
1326 if test "x$ac_supports_gcc_flags" = "xyes" ; then
1327 if test "$2" != CXX ; then
1328 #
1329 # Not C++-only; if this can be added to the C compiler flags, add them.
1330 #
1331 # If the option begins with "-W", add
1332 # $ac_wireshark_unknown_warning_option_error to make sure that
1333 # we'll get an error if it's an unknown warning option; not all
1334 # compilers treat unknown warning options as errors (I'm looking at
1335 # you, clang).
1336 #
1337 # If the option begins with "-f" or "-m", add -Werror to make sure
1338 # that we'll get an error if we get "argument unused during compilation"
1339 # warnings, as those will either cause a failure for files compiled
1340 # with -Werror or annoying noise for files compiled without it.
1341 # (Yeah, you, clang.)
1342 #
1343 AC_MSG_CHECKING(whether we can add $GCC_OPTION to CFLAGS)
1344 AC_WIRESHARK_PUSH_FLAGS
1345 if expr "x$GCC_OPTION" : "x-W.*" >/dev/null
1346 then
1347 CFLAGS="$CFLAGS $ac_wireshark_unknown_warning_option_error $GCC_OPTION"
1348 elif expr "x$GCC_OPTION" : "x-f.*" >/dev/null
1349 then
1350 CFLAGS="$CFLAGS -Werror $GCC_OPTION"
1351 elif expr "x$GCC_OPTION" : "x-m.*" >/dev/null
1352 then
1353 CFLAGS="$CFLAGS -Werror $GCC_OPTION"
1354 else
1355 CFLAGS="$CFLAGS $GCC_OPTION"
1356 fi
1357 AC_COMPILE_IFELSE(
1358 [
1359 AC_LANG_SOURCE([[int foo;]])
1360 ],
1361 [
1362 AC_MSG_RESULT(yes)
1363 can_add_to_cflags=yes
1364 #
1365 # OK, do we have a test program? If so, check
1366 # whether it fails with this option and -Werror,
1367 # and, if so, don't include it.
1368 #
1369 # We test arg 4 here because arg 3 is a program which
1370 # could contain quotes (breaking the comparison).
1371 #
1372 if test "x$4" != "x" ; then
1373 CFLAGS="$CFLAGS -Werror"
1374 AC_MSG_CHECKING(whether $GCC_OPTION $4)
1375 AC_COMPILE_IFELSE(
1376 [AC_LANG_SOURCE($3)],
1377 [
1378 AC_MSG_RESULT(no)
1379 #
1380 # Remove "force an error for a warning" options, if we
1381 # added them, by setting CFLAGS to the saved value plus
1382 # just the new option.
1383 #
1384 AX_APPEND_FLAG([$GCC_OPTION], [WS_CFLAGS])
1385 if test "$CC" = "$CC_FOR_BUILD"; then
1386 #
1387 # We're building the build tools with the same compiler
1388 # with which we're building Wireshark, so add the flags
1389 # to the flags for that compiler as well.
1390 #
1391 AX_APPEND_FLAG([$GCC_OPTION], [WS_CFLAGS_FOR_BUILD])
1392 fi
1393 ],
1394 [
1395 AC_MSG_RESULT(yes)
1396 ])
1397 else
1398 #
1399 # Remove "force an error for a warning" options, if we
1400 # added them, by setting CFLAGS to the saved value plus
1401 # just the new option.
1402 #
1403 AX_APPEND_FLAG([$GCC_OPTION], [WS_CFLAGS])
1404 if test "$CC" = "$CC_FOR_BUILD"; then
1405 #
1406 # We're building the build tools with the same compiler
1407 # with which we're building Wireshark, so add the flags
1408 # to the flags for that compiler as well.
1409 #
1410 AX_APPEND_FLAG([$GCC_OPTION], [WS_CFLAGS_FOR_BUILD])
1411 fi
1412 fi
1413 ],
1414 [
1415 AC_MSG_RESULT(no)
1416 can_add_to_cflags=no
1417 ])
1418 AC_WIRESHARK_POP_FLAGS
1419 fi
1420 #
1421 # Did we find a C++ compiler?
1422 #
1423 if test "x$CXX" != "x" ; then
1424 #
1425 # Yes. Is this option only for the C compiler?
1426 #
1427 if test "$2" != C ; then
1428 #
1429 # Not C-only; if this option can be added to the C++ compiler
1430 # options, add it.
1431 #
1432 # If the option begins with "-W", add
1433 # $ac_wireshark_unknown_warning_option_error, as per the above, and
1434 # also add $ac_wireshark_non_cxx_warning_option_error, because at
1435 # lease some versions of g++ whine about -Wmissing-prototypes, the
1436 # fact that at least one of those versions refuses to warn about
1437 # function declarations without an earlier declaration nonwithstanding;
1438 # perhaps there's a reason not to warn about that with C++ even though
1439 # warning about it can be a Good Idea with C, but it's not obvious to
1440 # me).
1441 #
1442 # If the option begins with "-f" or "-m", add -Werror to make sure
1443 # that we'll get an error if we get "argument unused during compilation"
1444 # warnings, as those will either cause a failure for files compiled
1445 # with -Werror or annoying noise for files compiled without it.
1446 # (Yeah, you, clang++.)
1447 #
1448 AC_MSG_CHECKING(whether we can add $GCC_OPTION to CXXFLAGS)
1449 AC_WIRESHARK_PUSH_FLAGS
1450 if expr "x$GCC_OPTION" : "x-W.*" >/dev/null
1451 then
1452 CXXFLAGS="$CXXFLAGS $ac_wireshark_unknown_warning_option_error $ac_wireshark_non_cxx_warning_option_error $GCC_OPTION"
1453 elif expr "x$GCC_OPTION" : "x-f.*" >/dev/null
1454 then
1455 CXXFLAGS="$CXXFLAGS -Werror $GCC_OPTION"
1456 elif expr "x$GCC_OPTION" : "x-m.*" >/dev/null
1457 then
1458 CXXFLAGS="$CXXFLAGS -Werror $GCC_OPTION"
1459 else
1460 CXXFLAGS="$CXXFLAGS $GCC_OPTION"
1461 fi
1462 AC_LANG_PUSH([C++])
1463 AC_COMPILE_IFELSE(
1464 [
1465 AC_LANG_SOURCE([[int foo;]])
1466 ],
1467 [
1468 AC_MSG_RESULT(yes)
1469 can_add_to_cxxflags=yes
1470 #
1471 # OK, do we have a test program? If so, check
1472 # whether it fails with this option and -Werror,
1473 # and, if so, don't include it.
1474 #
1475 # We test arg 4 here because arg 3 is a program which
1476 # could contain quotes (breaking the comparison).
1477 #
1478 if test "x$4" != "x" ; then
1479 CXXFLAGS="$CXXFLAGS -Werror"
1480 AC_MSG_CHECKING(whether $GCC_OPTION $4)
1481 AC_COMPILE_IFELSE(
1482 [AC_LANG_SOURCE($3)],
1483 [
1484 AC_MSG_RESULT(no)
1485 #
1486 # Remove "force an error for a warning" options, if we
1487 # added them, by setting CXXFLAGS to the saved value plus
1488 # just the new option.
1489 #
1490 AX_APPEND_FLAG([$GCC_OPTION], [WS_CXXFLAGS])
1491 ],
1492 [
1493 AC_MSG_RESULT(yes)
1494 ])
1495 else
1496 #
1497 # Remove "force an error for a warning" options, if we
1498 # added them, by setting CXXFLAGS to the saved value plus
1499 # just the new option.
1500 #
1501 AX_APPEND_FLAG([$GCC_OPTION], [WS_CXXFLAGS])
1502 fi
1503 ],
1504 [
1505 AC_MSG_RESULT(no)
1506 can_add_to_cxxflags=no
1507 ])
1508 AC_WIRESHARK_POP_FLAGS
1509 AC_LANG_POP([C++])
1510 fi
1511 if test "(" "$can_add_to_cflags" = "yes" -a "$can_add_to_cxxflags" = "no" ")" \
1512 -o "(" "$can_add_to_cflags" = "no" -a "$can_add_to_cxxflags" = "yes" ")"
1513 then
1514 #
1515 # Confusingly, some C++ compilers like -Wmissing-prototypes but
1516 # don't like -Wmissing-declarations and others like
1517 # -Wmissing-declarations but don't like -Wmissing-prototypes,
1518 # the fact that the corresponding C compiler likes both. Don't
1519 # warn about them.
1520 #
1521 if test "(" x$GCC_OPTION != x-Wmissing-prototypes ")" \
1522 -a "(" x$GCC_OPTION != x-Wmissing-declarations ")"
1523 then
1524 AC_MSG_WARN([$CC and $CXX appear to be a mismatched pair])
1525 fi
1526 fi
1527 fi
1528 fi
1529 ])
1530  
1531 # AC_WIRESHARK_GCC_FORTIFY_SOURCE_CHECK
1532 #
1533 # Checks if '-D_FORTIFY_SOURCE=...' is OK to use in CPPFLAGS.
1534 # Use '-D_FORTIFY_SOURCE=...' in CPPFLAGS only if the GCC 'optimization level' is > 0.
1535 # The use of '-D_FORTIFY_SOURCE=...' will cause a warning with at least some versions
1536 # of glibc if the GCC "optimization level" is 0 (default or -O or -O0)
1537 # when using GCC to compile a source file which references the macro definition.
1538 #
1539 # See: http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html
1540 # See: http://sourceware.org/bugzilla/show_bug.cgi?id=13979
1541 #
1542 # We'll use '-D_FORTIFY_SOURCE=2' only if there's no warning; Among other things this means
1543 # that the use of '-D_FORTIFY_SOURCE=2' with '-Werror' and '-O0' won't cause
1544 # the compiler to stop on error.
1545 # Assumption: CFLAGS already contains whatever optimization option including none) is
1546 # to be used.
1547 #
1548  
1549 AC_DEFUN([AC_WIRESHARK_GCC_FORTIFY_SOURCE_CHECK],
1550 [
1551 if test "x$GCC" = "xyes" -o "x$CC" = "xclang" ; then
1552 AC_MSG_CHECKING([whether -D_FORTIFY_SOURCE=2 can be used (without generating a warning)])
1553 AC_WIRESHARK_PUSH_FLAGS
1554 CFLAGS="$CFLAGS -Werror"
1555 CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"
1556 AC_COMPILE_IFELSE([
1557 AC_LANG_SOURCE([[
1558 #include <stdio.h>
1559 int foo;
1560 ]])],
1561 [
1562 AC_MSG_RESULT(yes)
1563 AX_APPEND_FLAG([-D_FORTIFY_SOURCE=2], [WS_CPPFLAGS])
1564 ],
1565 [
1566 AC_MSG_RESULT(no)
1567 ])
1568 AC_WIRESHARK_POP_FLAGS
1569 fi
1570 ])
1571  
1572 #
1573 # AC_WIRESHARK_GCC_SYSTEM_INCLUDE
1574 #
1575 # Replace -I include flag for -isystem in FLAGS argument
1576 #
1577 AC_DEFUN([AC_WIRESHARK_GCC_SYSTEM_INCLUDE],
1578 [
1579 if test "x$GCC" = "xyes" -o "x$CC" = "xclang" ; then
1580 $1=`echo " $$1" \
1581 | sed -e 's/ *-I *\// -isystem\//g' -e 's/^ *//'`
1582 fi
1583 ])
1584  
1585 #
1586 # PKG_WIRESHARK_CHECK_SYSTEM_MODULES
1587 #
1588 AC_DEFUN([PKG_WIRESHARK_CHECK_SYSTEM_MODULES],
1589 [
1590 PKG_CHECK_MODULES($@)
1591 AC_WIRESHARK_GCC_SYSTEM_INCLUDE($1_CFLAGS)
1592 ])
1593  
1594 # Based on AM_PATH_GTK in gtk-2.0.m4.
1595  
1596 dnl AC_WIRESHARK_QT_MODULE_CHECK_WITH_QT_VERSION([MODULE, MINIMUM-VERSION,
1597 dnl REQUESTED-MAJOR_VERSION, [ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND]]])
1598 dnl Test for a particular Qt module, for a particular Qt major version,
1599 dnl and, if we find it add the flags and libraries for it to Qt_CFLAGS
1600 dnl and Qt_LIBS.
1601 dnl
1602 AC_DEFUN([AC_WIRESHARK_QT_MODULE_CHECK_WITH_QT_VERSION],
1603 [
1604 case "$3" in
1605  
1606 4)
1607 #
1608 # Check for Qt 4.
1609 #
1610 modprefix="Qt"
1611 #
1612 # Version of the module we're checking for.
1613 # Default to 4.0.0.
1614 #
1615 min_qt_version=ifelse([$2], ,4.0.0,$2)
1616 ;;
1617  
1618 5)
1619 #
1620 # Check for Qt 5.
1621 #
1622 modprefix="Qt5"
1623 #
1624 # Version of the module we're checking for.
1625 # Default to 5.0.0.
1626 #
1627 min_qt_version=5.0.0
1628 ;;
1629  
1630 *)
1631 AC_MSG_ERROR([Qt version $3 is not a known Qt version])
1632 ;;
1633 esac
1634  
1635 pkg_config_module="${modprefix}$1"
1636 AC_MSG_CHECKING(for $pkg_config_module - version >= $min_qt_version)
1637 if $PKG_CONFIG --atleast-version $min_qt_version $pkg_config_module; then
1638 mod_version=`$PKG_CONFIG --modversion $pkg_config_module`
1639 AC_MSG_RESULT(yes (version $mod_version))
1640 mod_cflags=`$PKG_CONFIG --cflags $pkg_config_module`
1641 AC_WIRESHARK_GCC_SYSTEM_INCLUDE(mod_cflags)
1642 Qt_CFLAGS="$Qt_CFLAGS $mod_cflags"
1643 Qt_LIBS="$Qt_LIBS `$PKG_CONFIG --libs $pkg_config_module`"
1644 # Run Action-If-Found
1645 ifelse([$4], , :, [$4])
1646 else
1647 AC_MSG_RESULT(no)
1648 # Run Action-If-Not-Found
1649 ifelse([$5], , :, [$5])
1650 fi
1651 ])
1652  
1653 dnl AC_WIRESHARK_QT_MODULE_CHECK([MODULE, MINIMUM-VERSION,
1654 dnl REQUESTED-MAJOR_VERSION, [ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND]]])
1655 dnl Test for a particular Qt module and add the flags and libraries
1656 dnl for it to Qt_CFLAGS and Qt_LIBS.
1657 dnl
1658 AC_DEFUN([AC_WIRESHARK_QT_MODULE_CHECK],
1659 [
1660 #
1661 # Prior to Qt 5, modules were named QtXXX.
1662 # In Qt 5, they're named Qt5XXX.
1663 # This will need to change to handle future major Qt releases.
1664 #
1665 case "$3" in
1666  
1667 yes|unspecified)
1668 #
1669 # Check for all versions of Qt we support.
1670 # Try the Qt 5 version first.
1671 #
1672 versions="5 4"
1673 ;;
1674  
1675 4)
1676 #
1677 # Check for Qt 4.
1678 #
1679 versions="4"
1680 ;;
1681  
1682 5)
1683 #
1684 # Check for Qt 5.
1685 #
1686 versions="5"
1687 ;;
1688  
1689 *)
1690 AC_MSG_ERROR([Qt version $3 is not a known Qt version])
1691 ;;
1692 esac
1693  
1694 for version in $versions
1695 do
1696 AC_WIRESHARK_QT_MODULE_CHECK_WITH_QT_VERSION($1, $2,
1697 $version, [foundit=yes], [foundit=no])
1698 if test "x$foundit" = "xyes"; then
1699 break
1700 fi
1701 done
1702  
1703 if test "x$foundit" = "xyes"; then
1704 # Remember which version of Qt we found
1705 qt_version=$version
1706 # Run Action-If-Found
1707 ifelse([$4], , :, [$4])
1708 else
1709 # Run Action-If-Not-Found
1710 ifelse([$5], , :, [$5])
1711 fi
1712 ])
1713  
1714 AC_DEFUN([AC_WIRESHARK_QT_ADD_PIC_IF_NEEDED],
1715 [
1716 AC_LANG_PUSH([C++])
1717 AC_WIRESHARK_PUSH_FLAGS
1718 CPPFLAGS="$CPPFLAGS $Qt_CFLAGS"
1719 AC_MSG_CHECKING([whether Qt works without -fPIC])
1720 AC_PREPROC_IFELSE(
1721 [AC_LANG_SOURCE([[#include <QtCore>]])],
1722 [AC_MSG_RESULT(yes)],
1723 [
1724 AC_MSG_RESULT(no)
1725 AC_MSG_CHECKING([whether Qt works with -fPIC])
1726 CPPFLAGS="$CPPFLAGS -fPIC"
1727 AC_PREPROC_IFELSE(
1728 [AC_LANG_SOURCE([[#include <QtCore>]])],
1729 [
1730 AC_MSG_RESULT(yes)
1731 Qt_CFLAGS="$Qt_CFLAGS -fPIC"
1732 ],
1733 [
1734 AC_MSG_RESULT(no)
1735 AC_MSG_ERROR(Couldn't compile Qt without -fPIC nor with -fPIC)
1736 ])
1737 ])
1738 AC_WIRESHARK_POP_FLAGS
1739 AC_LANG_POP([C++])
1740 ])
1741  
1742 dnl AC_WIRESHARK_QT_CHECK([MINIMUM-VERSION, REQUESTED-MAJOR_VERSION,
1743 dnl [ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND]]])
1744 dnl Test for Qt and define Qt_CFLAGS and Qt_LIBS.
1745 dnl
1746 AC_DEFUN([AC_WIRESHARK_QT_CHECK],
1747 [
1748 qt_version_to_check="$2"
1749  
1750 #
1751 # Check for the Core module; if we don't have that,
1752 # we don't have Qt. If we *do* have it, we know what
1753 # version it is, so only check for that version of
1754 # other modules.
1755 #
1756 AC_WIRESHARK_QT_MODULE_CHECK(Core, $1, $qt_version_to_check,
1757 [
1758 qt_version_to_check=$qt_version
1759 QT_VERSION=$mod_version
1760 QT_VERSION_MAJOR=`echo "$QT_VERSION" | cut -f1 -d.`
1761 QT_VERSION_MINOR=`echo "$QT_VERSION" | cut -f2 -d.`
1762 QT_VERSION_MICRO=`echo "$QT_VERSION" | cut -f3 -d.`
1763  
1764 # Qt 5.7 and later requires C++11
1765 AS_IF([test $QT_VERSION_MAJOR -eq 5 -a $QT_VERSION_MINOR -ge 7],
1766 [AS_IF([test "$HAVE_CXX11" -eq 0], [AC_MSG_ERROR([Qt 5.7 and later requires C++11])])])
1767  
1768 ],
1769 [no_qt=yes])
1770  
1771 if test x"$no_qt" = x ; then
1772 #
1773 # We need the Gui module as well.
1774 #
1775 AC_WIRESHARK_QT_MODULE_CHECK(Gui, $1, $qt_version_to_check, ,
1776 [no_qt=yes])
1777 fi
1778  
1779 if test x"$no_qt" = x ; then
1780 #
1781 # Qt 5.0 appears to move the widgets out of Qt GUI
1782 # to Qt Widgets; look for the Widgets module, but
1783 # don't fail if we don't have it.
1784 #
1785 AC_WIRESHARK_QT_MODULE_CHECK(Widgets, $1, $qt_version_to_check)
1786  
1787 #
1788 # Qt 5.0 also appears to move the printing support into
1789 # the Qt PrintSupport module.
1790 #
1791 AC_WIRESHARK_QT_MODULE_CHECK(PrintSupport, $1, $qt_version_to_check)
1792  
1793 #
1794 # Qt 5.0 added multimedia in the Qt
1795 # Multimedia module.
1796 #
1797 have_qt_multimedia_lib=no
1798 AC_WIRESHARK_QT_MODULE_CHECK(Multimedia, $1, $qt_version_to_check,
1799 have_qt_multimedia_lib=yes
1800 AC_DEFINE(QT_MULTIMEDIA_LIB, 1, [Define if we have QtMultimedia]))
1801  
1802 #
1803 # While we're at it, look for QtMacExtras. (Presumably
1804 # if we're not building for OS X, it won't be present.)
1805 #
1806 # XXX - is there anything in QtX11Extras or QtWinExtras
1807 # that we should be using?
1808 #
1809 AC_WIRESHARK_QT_MODULE_CHECK(MacExtras, $1, $qt_version_to_check,
1810 AC_DEFINE(QT_MACEXTRAS_LIB, 1, [Define if we have QtMacExtras]))
1811  
1812 AC_WIRESHARK_QT_ADD_PIC_IF_NEEDED
1813  
1814 # Run Action-If-Found
1815 ifelse([$3], , :, [$3])
1816 else
1817 # Run Action-If-Not-Found
1818 ifelse([$4], , :, [$4])
1819 fi
1820  
1821 ])
1822  
1823 dnl AC_WIRESHARK_QT_TOOL_CHECK([TOOLPATHVAR, TOOL, REQUESTED-MAJOR_VERSION])
1824 dnl Test for a particular Qt tool for some specific version of Qt
1825 dnl
1826 AC_DEFUN([AC_WIRESHARK_QT_TOOL_CHECK],
1827 [
1828 #
1829 # At least in some versions of Debian/Ubuntu, and perhaps
1830 # other OSes, the Qt build tools are just links to a
1831 # program called "qtchooser", and even if you want to
1832 # build with Qt 5, running the tool might give you the
1833 # Qt 4 version of the tool unless you run the tool with
1834 # a -qt=5 argument.
1835 #
1836 # So we look for qtchooser and, if we find it, use the
1837 # -qt={version} argument, otherwise we look for particular
1838 # tool versions using tool name suffixes.
1839 #
1840 AC_PATH_PROG(QTCHOOSER, qtchooser)
1841 if test ! -z "$QTCHOOSER"; then
1842 #
1843 # We found qtchooser; we assume that means that
1844 # the tool is linked to qtchooser, so that we
1845 # can run it with the -qt={version} flag to get
1846 # the appropriate version of the tool.
1847 #
1848 AC_PATH_PROG($1, $2)
1849 if test "x$$1" = x; then
1850 #
1851 # We can't build Qt Wireshark without that
1852 # tool..
1853 #
1854 AC_MSG_ERROR(I couldn't find $2; make sure it's installed and in your path)
1855 fi
1856  
1857 #
1858 # Add the -qt={version} argument to it.
1859 #
1860 $1="$$1 -qt=$qt_version"
1861 else
1862 #
1863 # Annoyingly, on some Linux distros (e.g. Debian)
1864 # the Qt 5 tools have no suffix and the Qt 4 tools
1865 # have suffix -qt4. On other distros (e.g. openSUSE)
1866 # the Qt 5 tools have suffix -qt5 and the Qt 4 tools
1867 # have no suffix.
1868 #
1869 # So we check for the tool first with the -qtN suffix
1870 # and then with no suffix.
1871 #
1872 AC_PATH_PROGS($1, [$2-qt$qt_version $2])
1873 if test "x$$1" = x; then
1874 #
1875 # We can't build Qt Wireshark without that
1876 # tool..
1877 #
1878 AC_MSG_ERROR(I couldn't find $2-qt$qt_version or $2; make sure it's installed and in your path)
1879 fi
1880 fi
1881 ])
1882  
1883 AC_DEFUN([AC_WIRESHARK_QT_TOOL_CHECK_LRELEASE],
1884 [
1885 AC_WIRESHARK_QT_TOOL_CHECK(LRELEASE, lrelease, $2)
1886 AC_MSG_CHECKING(whether lrelease -version works)
1887 lrelease_version=`$LRELEASE -version 2>&AS_MESSAGE_LOG_FD`
1888 AS_IF([test $? -ne 0],
1889 [
1890 AC_MSG_RESULT(no)
1891 AC_MSG_ERROR([$LRELEASE -version returned non-zero exit status])
1892 ])
1893 AC_MSG_RESULT([ok, $lrelease_version])
1894 ])