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Enable and fix warnings during the build.

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Although CMake adds warning flags, they are ignored in the libc++ headers
because the headers '#pragma system header' themselves.

This patch disables the system header pragma when building libc++ and fixes
the warnings that arose.

The warnings fixed were:
1. <memory> - anonymous structs are a GNU extension
2. <functional> - anonymous structs are a GNU extension.
3. <__hash_table> - Embedded preprocessor directives have undefined behavior.
4. <string> - Definition is missing noexcept from declaration.
5. <__std_stream> - Unused variable.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@242623 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2015-07-18 20:40:46 +00:00
parent 0f7221ccb8
commit 692177d022
6 changed files with 29 additions and 19 deletions
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20
include/functional
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@@ -2402,14 +2402,14 @@ struct _LIBCPP_TYPE_VIS_ONLY hash<long double>
size_t __b;
size_t __c;
size_t __d;
};
} __s;
} __u;
__u.__a = 0;
__u.__b = 0;
__u.__c = 0;
__u.__d = 0;
__u.__s.__a = 0;
__u.__s.__b = 0;
__u.__s.__c = 0;
__u.__s.__d = 0;
__u.__t = __v;
return __u.__a ^ __u.__b ^ __u.__c ^ __u.__d;
return __u.__s.__a ^ __u.__s.__b ^ __u.__s.__c ^ __u.__s.__d;
#elif defined(__x86_64__)
// Zero out padding bits
union
@@ -2419,12 +2419,12 @@ struct _LIBCPP_TYPE_VIS_ONLY hash<long double>
{
size_t __a;
size_t __b;
};
} __s;
} __u;
__u.__a = 0;
__u.__b = 0;
__u.__s.__a = 0;
__u.__s.__b = 0;
__u.__t = __v;
return __u.__a ^ __u.__b;
return __u.__s.__a ^ __u.__s.__b;
#else
return __scalar_hash<long double>::operator()(__v);
#endif