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--- a/libc/aclocal.m4
+++ b/libc/aclocal.m4
@@ -88,6 +88,12 @@
fi
rm -fr contest*])
+dnl Test a compiler option or options with an empty input file.
+dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
+AC_DEFUN([LIBC_TRY_CC_OPTION],
+[AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
+ [$2], [$3])])
+
AC_DEFUN([LIBC_PROG_BINUTILS],
[# Was a --with-binutils option given?
if test -n "$path_binutils"; then
--- a/libc/configure
+++ b/libc/configure
@@ -7404,7 +7404,14 @@
else
libc_cv_cc_nofma=
for opt in -ffp-contract=off -mno-fused-madd; do
- LIBC_TRY_CC_OPTION($opt, libc_cv_cc_nofma=$opt; break)
+ if { ac_try='${CC-cc} $opt -xc /dev/null -S -o /dev/null'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }; then :
+ libc_cv_cc_nofma=$opt; break
+fi
done
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_nofma" >&5
--- a/libc/configure.in
+++ b/libc/configure.in
@@ -2238,10 +2238,9 @@
libc_cv_cc_submachine, [dnl
libc_cv_cc_submachine=no
for opt in "-march=$submachine" "-mcpu=$submachine"; do
- if AC_TRY_COMMAND([${CC-cc} $opt -xc /dev/null -S -o /dev/null]); then
+ LIBC_TRY_CC_OPTION([$opt], [
libc_cv_cc_submachine="$opt"
- break
- fi
+ break], [])
done])
if test "x$libc_cv_cc_submachine" = xno; then
AC_MSG_ERROR([${CC-cc} does not support $submachine])
|
