diff options
Diffstat (limited to 'projects/sample/autoconf/m4/build_exeext.m4')
| -rw-r--r-- | projects/sample/autoconf/m4/build_exeext.m4 | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/projects/sample/autoconf/m4/build_exeext.m4 b/projects/sample/autoconf/m4/build_exeext.m4 new file mode 100644 index 0000000000..1bdecc1ba5 --- /dev/null +++ b/projects/sample/autoconf/m4/build_exeext.m4 @@ -0,0 +1,42 @@ +# 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 | *.dSYM) ;; + *) 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)]) |