There are two issues: When build systems enable LTO in CFLAGS, the unused global integer does not make it into the compiled object file. As a workaround, check if the compiler understands -fno-lto and append it after CFLAGS while building the endianness test.
The hexdump output is line-wrapped, so the expected value will not be matched when its four bytes are split across two lines. Use the POSIX "-A n" option to disable printing input offsets and delete all newline characters to output continuous hex values to grep. Signed-off-by: David Michael <fedora....@gmail.com> --- configure | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/configure b/configure index 51e43fbf66..47160b4bbc 100755 --- a/configure +++ b/configure @@ -5756,10 +5756,11 @@ done check_cc pragma_deprecated "" '_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")' # The global variable ensures the bits appear unchanged in the object file. -test_cc <<EOF || die "endian test failed" +test_cflags -fno-lto && override_flags=-fno-lto || override_flags= +test_cc $override_flags <<EOF || die "endian test failed" unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E'; EOF -od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian +od -A n -t x1 $TMPO | tr -d '\n' | grep -q '42 *49 *47 *45' && enable bigendian check_cc const_nan math.h "struct { double d; } static const bar[] = { { NAN } }" -- 2.26.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".