Date: Mon, 16 Mar 2015 20:51:51 +0900 From: Warner Losh <imp@bsdimp.com> To: Dimitry Andric <dim@freebsd.org> Cc: freebsd-toolchain@freebsd.org, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, Mark Millard <markmi@dsl-only.net> Subject: Re: On powerpc 11.0-CURRENT CROSS_TOOLCHAIN=powerpc64-gcc fails: clang-tblgen use attempted before it exists Message-ID: <50E95EBE-B5A0-4C1C-8300-AF4DD773DF9B@bsdimp.com> In-Reply-To: <58E2D419-7DD0-4D93-942C-DA225BDC3455@FreeBSD.org> References: <81E69CED-2977-4146-A1DA-B199FDAFE146@dsl-only.net> <20150130005619.GA11558@ivaldir.etoilebsd.net> <89F97E94-AB9F-46C0-9AA2-C4D0680D64E7@dsl-only.net> <60F1C8B5-8621-452B-A6A3-DEE4B48B848D@dsl-only.net> <E053A305-8925-4CDB-B7D3-A632CB6BBE3D@bsdimp.com> <E3F9CFA6-04C2-482B-A649-035C41C0113C@dsl-only.net> <E5D42704-E94A-4E81-83C2-2B851EA8D023@bsdimp.com> <357555BE-7F87-4B25-95BE-43DD33CD8FE2@dsl-only.net> <FD3C3142-B6CC-410E-8ADF-DFF17AB445A1@dsl-only.net> <58E2D419-7DD0-4D93-942C-DA225BDC3455@FreeBSD.org>
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[-- Attachment #1 --]
> On Mar 16, 2015, at 7:02 PM, Dimitry Andric <dim@freebsd.org> wrote:
>
> On 16 Mar 2015, at 09:02, Mark Millard <markmi@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).
From earlier debugging, I’m pretty sure that the wrong g++ is being used in the CROSS_TOOLCHAIN case. I’m in Japan right now on travel, so I haven’t been able to track it down. WITHOUT_GCC_BOOTSTRAP should be implied in that case, but if not, that might explain why...
Warner
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