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Commit | Line | Data |
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223e47cc LB |
1 | # Check for the extension used for executables on build platform. |
2 | # This is necessary for cross-compiling where the build platform | |
3 | # may differ from the host platform. | |
4 | AC_DEFUN([AC_BUILD_EXEEXT], | |
5 | [ | |
6 | AC_MSG_CHECKING([for executable suffix on build platform]) | |
7 | AC_CACHE_VAL(ac_cv_build_exeext, | |
8 | [if test "$CYGWIN" = yes || test "$MINGW32" = yes; then | |
9 | ac_cv_build_exeext=.exe | |
10 | else | |
11 | ac_build_prefix=${build_alias}- | |
12 | ||
13 | AC_CHECK_PROG(BUILD_CC, ${ac_build_prefix}gcc, ${ac_build_prefix}gcc) | |
14 | if test -z "$BUILD_CC"; then | |
15 | AC_CHECK_PROG(BUILD_CC, gcc, gcc) | |
16 | if test -z "$BUILD_CC"; then | |
17 | AC_CHECK_PROG(BUILD_CC, cc, cc, , , /usr/ucb/cc) | |
18 | fi | |
19 | fi | |
20 | test -z "$BUILD_CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH]) | |
21 | ac_build_link='${BUILD_CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AS_MESSAGE_LOG_FD' | |
22 | rm -f conftest* | |
23 | echo 'int main () { return 0; }' > conftest.$ac_ext | |
24 | ac_cv_build_exeext= | |
25 | if AC_TRY_EVAL(ac_build_link); then | |
26 | for file in conftest.*; do | |
27 | case $file in | |
28 | *.c | *.o | *.obj | *.dSYM) ;; | |
29 | *) ac_cv_build_exeext=`echo $file | sed -e s/conftest//` ;; | |
30 | esac | |
31 | done | |
32 | else | |
33 | AC_MSG_ERROR([installation or configuration problem: compiler cannot create executables.]) | |
34 | fi | |
35 | rm -f conftest* | |
36 | test x"${ac_cv_build_exeext}" = x && ac_cv_build_exeext=blank | |
37 | fi]) | |
38 | BUILD_EXEEXT="" | |
39 | test x"${ac_cv_build_exeext}" != xblank && BUILD_EXEEXT=${ac_cv_build_exeext} | |
40 | AC_MSG_RESULT(${ac_cv_build_exeext}) | |
41 | ac_build_exeext=$BUILD_EXEEXT | |
42 | AC_SUBST(BUILD_EXEEXT)]) |