| # Check for the extension used for executables on build platform. |
| # This is necessary for cross-compiling where the build platform |
| # may differ from the host platform. |
| AC_DEFUN([AC_BUILD_EXEEXT], |
| [ |
| AC_MSG_CHECKING([for executable suffix on build platform]) |
| AC_CACHE_VAL(ac_cv_build_exeext, |
| [if test "$CYGWIN" = yes || test "$MINGW32" = yes; then |
| ac_cv_build_exeext=.exe |
| else |
| ac_build_prefix=${build_alias}- |
| |
| AC_CHECK_PROG(BUILD_CC, ${ac_build_prefix}gcc, ${ac_build_prefix}gcc) |
| if test -z "$BUILD_CC"; then |
| AC_CHECK_PROG(BUILD_CC, gcc, gcc) |
| if test -z "$BUILD_CC"; then |
| AC_CHECK_PROG(BUILD_CC, cc, cc, , , /usr/ucb/cc) |
| fi |
| fi |
| test -z "$BUILD_CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH]) |
| ac_build_link='${BUILD_CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AS_MESSAGE_LOG_FD' |
| rm -f conftest* |
| echo 'int main () { return 0; }' > conftest.$ac_ext |
| ac_cv_build_exeext= |
| if AC_TRY_EVAL(ac_build_link); then |
| for file in conftest.*; do |
| case $file in |
| *.c | *.o | *.obj) ;; |
| *) ac_cv_build_exeext=`echo $file | sed -e s/conftest//` ;; |
| esac |
| done |
| else |
| AC_MSG_ERROR([installation or configuration problem: compiler cannot create executables.]) |
| fi |
| rm -f conftest* |
| test x"${ac_cv_build_exeext}" = x && ac_cv_build_exeext=blank |
| fi]) |
| BUILD_EXEEXT="" |
| test x"${ac_cv_build_exeext}" != xblank && BUILD_EXEEXT=${ac_cv_build_exeext} |
| AC_MSG_RESULT(${ac_cv_build_exeext}) |
| ac_build_exeext=$BUILD_EXEEXT |
| AC_SUBST(BUILD_EXEEXT)]) |
