diff options
| -rw-r--r-- | configure.ac | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index b034b76012..643d691a11 100644 --- a/configure.ac +++ b/configure.ac @@ -84,17 +84,19 @@ AS_COMPILER_FLAGS(WARNING_FLAGS, AC_SUBST(WARNING_FLAGS) dnl Other useful compiler warnings for test builds only. -dnl These may produce warnings we have no control over. +dnl These may produce warnings we have no control over, +dnl or false positives we don't always want to see. +dnl dnl -Wmissing-format-attribute dnl -Wshadow dnl -Wformat-nonliteral +dnl -Wstrict-aliasing=2 -dnl GCC 4.4 got more aggressive in it's aliasing optimizations, changing +dnl GCC 4.4 got more aggressive in its aliasing optimizations, changing dnl behavior that -- according to the C99 standard -- is supposed to be dnl undefined. We may still have aliasing abuses lying around that rely -dnl on GCC's previous "undefined" behavior but are hidden by type casts, -dnl so disable the strict-aliasing optimzation until GCC (or even LLVM) -dnl learns how to detect them and warn us about it. +dnl on GCC's previous "undefined" behavior, so disable strict-aliasing +dnl optimzation until we can find and fix all the abuses. dnl XXX This really belongs in AM_CFLAGS. AM_CPPFLAGS="$WARNING_FLAGS -fno-strict-aliasing" AC_SUBST(AM_CPPFLAGS) |