| Reid Spencer | 93b59c6 | 2006-07-26 20:45:12 +0000 | [diff] [blame] | 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]) |
| Reid Spencer | 5332430 | 2006-07-26 21:08:09 +0000 | [diff] [blame] | 21 | ac_build_link='${BUILD_CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AS_MESSAGE_LOG_FD' |
| Reid Spencer | 93b59c6 | 2006-07-26 20:45:12 +0000 | [diff] [blame] | 22 | rm -f conftest* |
| 23 | echo 'int main () { return 0; }' > conftest.$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) ;; |
| 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)]) |