Suppress error console output duing configure in case not an ELF file (#729)

On Cygwin, MSYS and MinGW readelf is available, but files generated are no
ELF files. This results in an Error output on console:
'checking whether .eh_frame section should be read-only... readelf: Error: Not an ELF file - it has the wrong magic bytes at the start
yes'
With this patch the error output is suppressed resulting in only
'checking whether .eh_frame section should be read-only... yes'
Setting of related variables is not changed.

Co-authored-by: Hannes Müller <>

diff --git a/configure.ac b/configure.ac
index ed394c9f914583800bb42c07623e91eb97a37ba7..0ac8b76a1e522db65cf2c82cd823de6c5f8541a0 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -294,7 +294,7 @@ if test "x$GCC" = "xyes"; then
        libffi_cv_ro_eh_frame=yes
        echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
        if $CC $CFLAGS -c -fpic -fexceptions $libffi_cv_no_lto -o conftest.o conftest.c > /dev/null 2>&1; then
-           if $READELF -WS conftest.o | grep -q -n 'eh_frame .* WA'; then
+           if $READELF -WS conftest.o 2>/dev/null | grep -q -n 'eh_frame .* WA'; then
                libffi_cv_ro_eh_frame=no
            fi
        fi