[Bug c/59870] Gcc should warn conversion from "const char*" to "char*" for string literals

[harald at gigawatt dot nl]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59870

Harald van Dijk <harald at gigawatt dot nl> changed:

           What    |Removed                     |Added
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                 CC|                            |harald at gigawatt dot nl

--- Comment #2 from Harald van Dijk <harald at gigawatt dot nl> ---
The type of a string literal in C is char[N], unlike in C++ where it is const
char[N]. clang's -Weverything option enables -Wwrite-strings, which changes the
type const char[N] and because of that makes the compiler not conform to the C
standard. The same -Wwrite-strings option also exists in GCC already (in fact,
I would be surprised if clang's name for the option didn't come from GCC), so I
don't think there's anything in GCC that needs changing.

$ gcc -Wwrite-strings test.c
test.c: In function ‘main’:
test.c:4:19: warning: initialization discards ‘const’ qualifier from pointer
target type [enabled by default]
         char* s = "test";
                   ^