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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index a535a09de8..fc5ddb8561 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1610,7 +1610,7 @@ LIBC_CONFIG_VAR(test-config-cflags-finput-charset-ascii,
$libc_cv_test_cflags_finput_charset_ascii)
dnl Check if TEST_CXX supports -finput-charset=ascii.
-LIBC_TRY_TEST_CXX_OPTION([-finput-charset=ascii],
+LIBC_TRY_TEST_CXX_OPTION([$CXX -finput-charset=ascii],
[-c -Werror -finput-charset=ascii],
libc_cv_test_cxxflags_finput_charset_ascii,
[libc_cv_test_cxxflags_finput_charset_ascii="-finput-charset=ascii"],