On 16 Mar 2015, at 09:02, Mark Millard <mar...@dsl-only.net> wrote:
>
> I found why gcc 4.2.1's cc1plus was getting -std=c++11 for the
> CROSS_TOOLCHAIN=powerpc64-gcc compiles that involve WITH_CLANG= .
> (WITHOUT_CLANG= does not get the "unrecognized" notices.) There is a global
> assignment to CXXFLAGS for all compilers whenever clang.build.mk is in use
> (showing my experimental change...):
>
> # svnlite diff /usr/srcC/lib/clang/clang.build.mk
> Index: /usr/srcC/lib/clang/clang.build.mk
> ===================================================================
> --- /usr/srcC/lib/clang/clang.build.mk (revision 279514)
> +++ /usr/srcC/lib/clang/clang.build.mk (working copy)
> @@ -34,8 +34,8 @@
> CFLAGS+= -DLLVM_DEFAULT_TARGET_TRIPLE=\"${TARGET_TRIPLE}\" \
> -DLLVM_HOST_TRIPLE=\"${BUILD_TRIPLE}\" \
> -DDEFAULT_SYSROOT=\"${TOOLS_PREFIX}\"
> -CXXFLAGS+= -std=c++11 -fno-exceptions -fno-rtti
> -CXXFLAGS.clang+= -stdlib=libc++
> +CXXFLAGS+= -fno-exceptions -fno-rtti
> +CXXFLAGS.clang+= -std=c++11 -stdlib=libc++
>
> .PATH: ${LLVM_SRCS}/${SRCDIR}
>
> It may be that the "-fno-exceptions -fno-rtti" are also suspect for being not
> limited to clang contexts.This is incorrect. Clang needs -std=c++11, otherwise it cannot compile. I suspect you also need WITHOUT_CLANG_BOOTSTRAP (and WITHOUT_GCC_BOOTSTRAP, probably). -Dimitry
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