The attached patch adds definitions of TARGET_PRINTF_POINTER_FORMAT to the rs6000 pair of linux.h and linux64.h headers, analogous to the config/linux.h header. This appears to be necessary since unlike most other back ends, the rs6000 back end doesn't include the latter linux.h.
The patch fixes bug 77837 - missing -Wformat-length warning for %p with null argument on powerpc64. Thanks Martin
PR target/77837 - missing -Wformat-length warning for %p with null argument on powerpc64 gcc/ChangeLog: 2016-10-03 Martin Sebor <mse...@redhat.com> PR target/77837 * config/rs6000/linux.h (TARGET_PRINTF_POINTER_FORMAT): Define. * config/rs6000/linux64.h (TARGET_PRINTF_POINTER_FORMAT): Likewise. diff --git a/gcc/config/rs6000/linux.h b/gcc/config/rs6000/linux.h index ac9296d..e70fa02 100644 --- a/gcc/config/rs6000/linux.h +++ b/gcc/config/rs6000/linux.h @@ -138,3 +138,7 @@ || (TARGET_GLIBC_MAJOR == 2 && TARGET_GLIBC_MINOR >= 19) #define RS6000_GLIBC_ATOMIC_FENV 1 #endif + +/* The format string to which "%p" corresponds. */ +#undef TARGET_PRINTF_POINTER_FORMAT +#define TARGET_PRINTF_POINTER_FORMAT gnu_libc_printf_pointer_format diff --git a/gcc/config/rs6000/linux64.h b/gcc/config/rs6000/linux64.h index e86b5d5..fa75bce 100644 --- a/gcc/config/rs6000/linux64.h +++ b/gcc/config/rs6000/linux64.h @@ -634,3 +634,7 @@ extern int dot_symbols; || (TARGET_GLIBC_MAJOR == 2 && TARGET_GLIBC_MINOR >= 19) #define RS6000_GLIBC_ATOMIC_FENV 1 #endif + +/* The format string to which "%p" corresponds. */ +#undef TARGET_PRINTF_POINTER_FORMAT +#define TARGET_PRINTF_POINTER_FORMAT gnu_libc_printf_pointer_format
