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Fix compilation under LLVM/clang with --enable-gcc-warnings

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- When compiling using clang (2.9 or lower) do not enable
  -Wnormalized=id or -Woverride-init when --enable-gcc-warnings
  or --enable-gcc-warnings-advisory is set as these options
  are unsupported.
This commit is contained in:
Steven Murdoch 2011-03-09 19:05:51 +00:00 committed by Sebastian Hahn
parent 473ff26563
commit 56bdc844ba
1 changed files with 15 additions and 2 deletions
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17
configure.in
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@ -894,6 +894,11 @@ if test x$enable_gcc_warnings = xyes || test x$enable_gcc_warnings_advisory = xy
#error
#endif])], have_gcc43=yes, have_gcc43=no)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__) || (__clang_major__ > 2) || (__clang_major__ == 2 && __clang_minor__ > 9)
#error
#endif])], have_clang29orlower=yes, have_clang29orlower=no)
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wshorten-64-to-32"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
@ -924,11 +929,19 @@ if test x$enable_gcc_warnings = xyes || test x$enable_gcc_warnings_advisory = xy
if test x$have_gcc42 = xyes ; then
# These warnings break gcc 4.0.2 and work on gcc 4.2
# XXXX020 See if any of these work with earlier versions.
CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wnormalized=id -Woverride-init -Wstrict-overflow=1"
CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
# We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
fi
if test x$have_gcc43 = xyes ; then
if test x$have_gcc42 = xyes && test x$have_clang29orlower = xno; then
# These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
# We only disable these for clang 2.9 and lower, in case they are
# supported in later versions.
CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
fi
if test x$have_gcc43 = xyes ; then
# These warnings break gcc 4.2 and work on gcc 4.3
# XXXX020 See if any of these work with earlier versions.
CFLAGS="$CFLAGS -Wextra -Warray-bounds"