On 06/05/2013 03:16 PM, Christopher Sean Morrison wrote:
> getting past GCC's pedantic point about direct type conversion.
If the user tests with -Werror that warning could be a problem,
so that flag is worth stripping if possible.
Ideally we need a test that works with gcc flags
-std=c99 -pedantic -Werror -O3
The only one I've found from some quick experiments requires
two source files:
$ cat symbol_main.c
#include <stdio.h> /* declares tested symbol */
extern int cmakeRequireSymbol();
int main(void) { return cmakeRequireSymbol(&printf); }
$ cat symbol_impl.c
int cmakeRequireSymbol(int* x) { return *x; }
$ gcc -std=c99 -pedantic -Werror -O3 symbol_main.c symbol_impl.c
In this approach we hide the pointer conversion from the compiler.
If a compiler does whole-program optimization we could restore the
argc offset part.
-Brad
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