diff options
Diffstat (limited to 'mesonbuild/compilers.py')
| -rw-r--r-- | mesonbuild/compilers.py | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/mesonbuild/compilers.py b/mesonbuild/compilers.py index 0f6250f..7b9adde 100644 --- a/mesonbuild/compilers.py +++ b/mesonbuild/compilers.py @@ -1020,11 +1020,23 @@ int main(int argc, char **argv) { if self.links(templ.format(prefix, funcname), env, extra_args, dependencies): return True # Some functions like alloca() are defined as compiler built-ins which - # are inlined by the compiler, so test for that instead. Built-ins are - # special functions that ignore all includes and defines, so we just - # directly try to link via main(). - return self.links('int main() {{ {0}; }}'.format('__builtin_' + funcname), - env, extra_args, dependencies) + # are inlined by the compiler, so look for __builtin_symbol in the libc + # if there's no #include-s in prefix which would've #define-d the + # symbol correctly. If there is a #include, just check for the symbol + # directly. This is needed because the above #undef fancy footwork + # doesn't work for builtins. + # This fixes instances such as #1083 where MSYS2 defines + # __builtin_posix_memalign in the C library but doesn't define + # posix_memalign in the headers to point to that builtin which results + # in an invalid detection. + if '#include' not in prefix: + code = 'int main() {{ {0}; }}' + return self.links(code.format('__builtin_' + funcname), env, + extra_args, dependencies) + else: + code = '{0}\n' + stubs_fail + '\nint main() {{ {1}; }}' + return self.links(code.format(prefix, funcname), env, extra_args, + dependencies) def has_members(self, typename, membernames, prefix, env, extra_args=None, dependencies=None): if extra_args is None: |