Date: Tue, 5 Dec 2017 10:42:49 -0800 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD Toolchain <freebsd-toolchain@freebsd.org>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, FreeBSD Ports <freebsd-ports@freebsd.org> Subject: 32-bit powerpc system-clang based builds of devel/llvm40 and devel/llvm50: fails via "Host compiler appears to require libatomic, but cannot find it" Message-ID: <C4699D3D-56E0-4678-89D7-0725117A622C@dsl-only.net>
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[I experiment with system-clang based buildworld and/or buildkernel based TARGET_ARCH=3Dpowerpc64 and TARGET_ARCH=3Dpowerpc environments.] For TARGET_ARCH=3Dpowerpc devel/llvm40 and devel/llvm50 get failure reports like: -- Looking for __atomic_load_8 in atomic - not found CMake Error at cmake/modules/CheckAtomic.cmake:74 (message): Host compiler appears to require libatomic, but cannot find it. Call Stack (most recent call first): cmake/config-ix.cmake:307 (include) CMakeLists.txt:582 (include) I had tried to avoid any need for 8-Byte atomics (among other things) by avoiding LIT, LLD, and LLDB: # more /usr/local/etc/poudriere.d/options/devel_llvm50/options # This file is auto-generated by 'make config'. # Options for llvm50-5.0.0_1 _OPTIONS_READ=3Dllvm50-5.0.0_1 _FILE_COMPLETE_OPTIONS_LIST=3DCLANG DOCS EXTRAS LIT LLD LLDB OPTIONS_FILE_SET+=3DCLANG OPTIONS_FILE_SET+=3DDOCS OPTIONS_FILE_SET+=3DEXTRAS OPTIONS_FILE_UNSET+=3DLIT OPTIONS_FILE_UNSET+=3DLLD OPTIONS_FILE_UNSET+=3DLLDB # more /usr/local/etc/poudriere.d/options/devel_llvm40/options # This file is auto-generated by 'make config'. # Options for llvm40-4.0.1_1 _OPTIONS_READ=3Dllvm40-4.0.1_1 _FILE_COMPLETE_OPTIONS_LIST=3DCLANG DOCS EXTRAS LIT LLD LLDB OPTIONS_FILE_SET+=3DCLANG OPTIONS_FILE_SET+=3DDOCS OPTIONS_FILE_SET+=3DEXTRAS OPTIONS_FILE_UNSET+=3DLIT OPTIONS_FILE_UNSET+=3DLLD OPTIONS_FILE_UNSET+=3DLLDB For clang-based buildworld avoiding such things prevents running into the 8-Byte atomics based build failures: WITH_LIBCPLUSPLUS=3D WITH_BINUTILS_BOOTSTRAP=3D WITH_ELFTOOLCHAIN_BOOTSTRAP=3D #WITH_CLANG_BOOTSTRAP=3D WITH_CLANG=3D WITH_CLANG_IS_CC=3D WITH_CLANG_FULL=3D WITH_CLANG_EXTRAS=3D WITH_LLD=3D # lldb requires missing atomic 8-byte operations for powerpc (non-64) WITHOUT_LLDB=3D # WITH_BOOT=3D (Note: buildkernel currently fails.) # clang++ --version FreeBSD clang version 5.0.0 (tags/RELEASE_500/final 312559) (based on = LLVM 5.0.0svn) Target: powerpc-unknown-freebsd12.0 Thread model: posix InstalledDir: /usr/bin # uname -apKU FreeBSD FBSDG4S 12.0-CURRENT FreeBSD 12.0-CURRENT r326192M powerpc = powerpc 1200054 1200054 # svnlite info /usr/ports/ | grep "Re[plv]" Relative URL: ^/head Repository Root: https://svn.freebsd.org/ports Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5 Revision: 455204 Last Changed Rev: 455204 =3D=3D=3D Mark Millard markmi at dsl-only.net
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