nexmon – Blame information for rev 1
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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | office | 1 | # environ.m4 serial 6 |
| 2 | dnl Copyright (C) 2001-2004, 2006-2016 Free Software Foundation, Inc. |
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| 3 | dnl This file is free software; the Free Software Foundation |
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| 4 | dnl gives unlimited permission to copy and/or distribute it, |
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| 5 | dnl with or without modifications, as long as this notice is preserved. |
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| 6 | |||
| 7 | AC_DEFUN_ONCE([gl_ENVIRON], |
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| 8 | [ |
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| 9 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) |
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| 10 | dnl Persuade glibc <unistd.h> to declare environ. |
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| 11 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
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| 12 | |||
| 13 | AC_CHECK_HEADERS_ONCE([unistd.h]) |
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| 14 | gt_CHECK_VAR_DECL( |
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| 15 | [#if HAVE_UNISTD_H |
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| 16 | #include <unistd.h> |
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| 17 | #endif |
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| 18 | /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */ |
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| 19 | #include <stdlib.h> |
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| 20 | ], |
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| 21 | [environ]) |
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| 22 | if test $gt_cv_var_environ_declaration != yes; then |
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| 23 | HAVE_DECL_ENVIRON=0 |
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| 24 | fi |
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| 25 | ]) |
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| 26 | |||
| 27 | # Check if a variable is properly declared. |
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| 28 | # gt_CHECK_VAR_DECL(includes,variable) |
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| 29 | AC_DEFUN([gt_CHECK_VAR_DECL], |
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| 30 | [ |
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| 31 | define([gt_cv_var], [gt_cv_var_]$2[_declaration]) |
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| 32 | AC_MSG_CHECKING([if $2 is properly declared]) |
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| 33 | AC_CACHE_VAL([gt_cv_var], [ |
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| 34 | AC_COMPILE_IFELSE( |
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| 35 | [AC_LANG_PROGRAM( |
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| 36 | [[$1 |
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| 37 | extern struct { int foo; } $2;]], |
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| 38 | [[$2.foo = 1;]])], |
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| 39 | [gt_cv_var=no], |
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| 40 | [gt_cv_var=yes])]) |
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| 41 | AC_MSG_RESULT([$gt_cv_var]) |
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| 42 | if test $gt_cv_var = yes; then |
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| 43 | AC_DEFINE([HAVE_]m4_translit($2, [a-z], [A-Z])[_DECL], 1, |
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| 44 | [Define if you have the declaration of $2.]) |
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| 45 | fi |
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| 46 | undefine([gt_cv_var]) |
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| 47 | ]) |