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authorLuca Barbato <lu_zero@gentoo.org>2017-03-06 20:21:19 +0100
committerMartin Storsjö <martin@martin.st>2017-03-07 09:48:55 +0200
commit81bffae368f331b6cd386a814f225a58e3f32f40 (patch)
tree9efa6eb934b93a9946b409d7fd9a3f2332bb09cd /libavcodec/sgienc.c
parent57b753b445e23363c997a8ec1c556e0b0f6e9da3 (diff)
downloadffmpeg-81bffae368f331b6cd386a814f225a58e3f32f40.tar.gz
configure: Check for -no_weak_imports in ldflags on macOS
Recent versions of macOS provide more POSIX API (in particular, clock_gettime) than previous versions and recent Apple toolchains provide all that API, even when targeting older releases without said API. Disallow linking to functions which might not be available at runtime. To actually have an effect, either add --extra-cflags="-mmacosx-version-min=10.11" (or any other version prior to 10.12) or set MACOSX_DEPLOYMENT_TARGET=10.11 when running configure. As a workaround for libav versions without this fix, one can also add --extra-cflags="-mmacosx-version-min=10.11 -Werror=partial-availability" while running configure. The -no_weak_imports flag is new in Xcode 8; in Xcode 7 it is not supported. This is not an issue since Xcode 7 only ships with the 10.11 macOS SDK, which lacks clock_gettime. Bug-Id: 1033 CC: libav-stable@libav.org Signed-off-by: Martin Storsjö <martin@martin.st>
Diffstat (limited to 'libavcodec/sgienc.c')
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