On 2015-11-04 18:03 (+0100), Papoj Thamjaroenporn wrote:
I became tired of seeing these same warning messages over and over again
whenever I compile and debug the code:
/opt/local/include/gc/gc.h:804:23: warning: unknown attribute
'__alloc_size__'
ignored [-Wunknown-attributes]
GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL
<...>
It seems that clang has removed alloc_size attribute
<https://github.com/neovim/neovim/issues/429> a while ago. But these
warnings would pop up about gazillion times per compiling session, from
gc.h, so I am wondering if I can suppress this warning specifically. I’m
not familiar with how to add a suppression in autoconf. Do I just do the
following in configure step?
../trunk/configure --prefix=YOUR_BUILD_DIRECTORY--disable-static
--enable-shared CC="clang" CXX="clang++" CXXFLAGS="-std=c++11
-stdlib=libc++ -I/opt/local/include *-Wno-unknown-attributes*"
CPPFLAGS="-I/opt/local/include -U__STRICT_ANSI__ *-Wno-unknown-attributes*"
If I re-configure the build, do I have to run "make install" again
before "make -j 4"?
I’m also not sure if globally suppressing this kind of warning is
recommended. I have not seen this kind of warning other than this, and I
couldn’t even find its definition on the official Clang documentation
<http://clang.llvm.org/docs/UsersManual.html>. If this is not
recommended, does anyone know how I can specifically suppress this
particular warning?
boehmgc git master seems to have fixes committed already, but they are
not part of a stable release yet - a possible workaround would be to
file a trac ticket for MacPorts and ask to have the commits used as
patches for the boehmgc port (or to installed boehmgc via portfile in
local port repository which includes the upstream patches):
File:
https://github.com/ivmai/bdwgc/commits/master/include/gc_config_macros.hCommits related to recent clang:
https://github.com/ivmai/bdwgc/commit/8fc1f3b61b02320848b035ccccd59e04e77d3f6bhttps://github.com/ivmai/bdwgc/commit/b725923951d77f5c6792c2797f89179267c58c9c
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