2006-07-26 22:45:12 +02:00
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# Check for the extension used for executables on build platform.
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# This is necessary for cross-compiling where the build platform
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# may differ from the host platform.
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AC_DEFUN([AC_BUILD_EXEEXT],
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[
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AC_MSG_CHECKING([for executable suffix on build platform])
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AC_CACHE_VAL(ac_cv_build_exeext,
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[if test "$CYGWIN" = yes || test "$MINGW32" = yes; then
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ac_cv_build_exeext=.exe
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else
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ac_build_prefix=${build_alias}-
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AC_CHECK_PROG(BUILD_CC, ${ac_build_prefix}gcc, ${ac_build_prefix}gcc)
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if test -z "$BUILD_CC"; then
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AC_CHECK_PROG(BUILD_CC, gcc, gcc)
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if test -z "$BUILD_CC"; then
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AC_CHECK_PROG(BUILD_CC, cc, cc, , , /usr/ucb/cc)
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fi
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fi
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test -z "$BUILD_CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
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2006-07-26 23:08:09 +02:00
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ac_build_link='${BUILD_CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&AS_MESSAGE_LOG_FD'
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2006-07-26 22:45:12 +02:00
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rm -f conftest*
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echo 'int main () { return 0; }' > conftest.$ac_ext
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ac_cv_build_exeext=
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if AC_TRY_EVAL(ac_build_link); then
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for file in conftest.*; do
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case $file in
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2008-09-26 19:27:58 +02:00
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*.c | *.o | *.obj | *.dSYM) ;;
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2006-07-26 22:45:12 +02:00
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*) ac_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
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esac
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done
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else
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AC_MSG_ERROR([installation or configuration problem: compiler cannot create executables.])
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fi
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rm -f conftest*
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test x"${ac_cv_build_exeext}" = x && ac_cv_build_exeext=blank
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fi])
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BUILD_EXEEXT=""
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test x"${ac_cv_build_exeext}" != xblank && BUILD_EXEEXT=${ac_cv_build_exeext}
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AC_MSG_RESULT(${ac_cv_build_exeext})
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ac_build_exeext=$BUILD_EXEEXT
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AC_SUBST(BUILD_EXEEXT)])
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