From: Luca Barbato <lu_z...@gentoo.org>
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-sta...@libav.org
---
configure | 1 +
1 file changed, 1 insertion(+)
diff --git a/configure b/configure
index cdeae9a..170585a 100755
--- a/configure
+++ b/configure
@@ -3944,6 +3944,7 @@ case $target_os in
SHFLAGS='-dynamiclib -Wl,-single_module
-Wl,-install_name,$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
add_ldflags -Wl,-dynamic,-search_paths_first
+ check_ldflags -Wl,-no_weak_imports
SLIBSUF=".dylib"
SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME).$(LIBVERSION)$(SLIBSUF)'
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME).$(LIBMAJOR)$(SLIBSUF)'
--
2.10.1 (Apple Git-78)
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