gcc before gcc-5 reserves a register on x86_32 for the GOT, when PIE is enabled.
This fixes build failures due to: error: 'asm' operand has impossible constraints Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com> --- A build log of a failed build with gcc 4.9 is available at: https://buildd.debian.org/status/fetch.php?pkg=ffmpeg&arch=i386&ver=7%3A3.2-2~bpo8%2B1&stamp=1478791165 --- configure | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/configure b/configure index b5bfad6..8794580 100755 --- a/configure +++ b/configure @@ -5364,6 +5364,19 @@ EOF enabled ssse3 && check_inline_asm ssse3_inline '"pabsw %xmm0, %xmm0"' enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"' + case "$toolchain" in + hardened) + if enabled x86_32; then + # When PIE is enabled on x86_32, gcc before gcc-5 reserves a register for the GOT. + case $gcc_basever in + 2*|3*|4*) + disable ebp_available + ;; + esac + fi + ;; + esac + if ! disabled_any asm mmx yasm; then if check_cmd $yasmexe --version; then enabled x86_64 && yasm_extra="-m amd64" -- 2.10.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
