nexmon – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | # multiarch.m4 serial 6 |
2 | dnl Copyright (C) 2008-2011 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 | # Determine whether the compiler is or may be producing universal binaries. |
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8 | # |
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9 | # On MacOS X 10.5 and later systems, the user can create libraries and |
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10 | # executables that work on multiple system types--known as "fat" or |
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11 | # "universal" binaries--by specifying multiple '-arch' options to the |
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12 | # compiler but only a single '-arch' option to the preprocessor. Like |
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13 | # this: |
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14 | # |
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15 | # ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ |
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16 | # CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ |
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17 | # CPP="gcc -E" CXXCPP="g++ -E" |
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18 | # |
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19 | # Detect this situation and set APPLE_UNIVERSAL_BUILD accordingly. |
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20 | |||
21 | AC_DEFUN_ONCE([gl_MULTIARCH], |
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22 | [ |
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23 | dnl Code similar to autoconf-2.63 AC_C_BIGENDIAN. |
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24 | gl_cv_c_multiarch=no |
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25 | AC_COMPILE_IFELSE( |
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26 | [AC_LANG_SOURCE( |
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27 | [[#ifndef __APPLE_CC__ |
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28 | not a universal capable compiler |
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29 | #endif |
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30 | typedef int dummy; |
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31 | ]])], |
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32 | [ |
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33 | dnl Check for potential -arch flags. It is not universal unless |
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34 | dnl there are at least two -arch flags with different values. |
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35 | arch= |
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36 | prev= |
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37 | for word in ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS}; do |
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38 | if test -n "$prev"; then |
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39 | case $word in |
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40 | i?86 | x86_64 | ppc | ppc64) |
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41 | if test -z "$arch" || test "$arch" = "$word"; then |
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42 | arch="$word" |
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43 | else |
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44 | gl_cv_c_multiarch=yes |
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45 | fi |
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46 | ;; |
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47 | esac |
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48 | prev= |
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49 | else |
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50 | if test "x$word" = "x-arch"; then |
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51 | prev=arch |
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52 | fi |
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53 | fi |
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54 | done |
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55 | ]) |
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56 | if test $gl_cv_c_multiarch = yes; then |
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57 | APPLE_UNIVERSAL_BUILD=1 |
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58 | else |
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59 | APPLE_UNIVERSAL_BUILD=0 |
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60 | fi |
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61 | AC_SUBST([APPLE_UNIVERSAL_BUILD]) |
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62 | ]) |