On 06/03/2017 22:15, Martin Storsjö wrote:
> 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)'
> 

Looks good :) Thank you a lot for testing and amending!

lu
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