################################################################################
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#
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# clang
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#
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################################################################################
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# LLVM, Clang and lld should be version bumped together
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CLANG_VERSION = 9.0.1
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CLANG_SITE = https://github.com/llvm/llvm-project/releases/download/llvmorg-$(CLANG_VERSION)
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CLANG_SOURCE = clang-$(CLANG_VERSION).src.tar.xz
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CLANG_LICENSE = Apache-2.0 with exceptions
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CLANG_LICENSE_FILES = LICENSE.TXT
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CLANG_SUPPORTS_IN_SOURCE_BUILD = NO
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CLANG_INSTALL_STAGING = YES
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HOST_CLANG_DEPENDENCIES = host-llvm host-libxml2
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CLANG_DEPENDENCIES = llvm host-clang
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# LLVM >= 9.0 will soon require C++14 support, building llvm 8.x using a
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# toolchain using gcc < 5.1 gives an error but actually still works. Setting
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# this option makes it still build with gcc >= 4.8.
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# https://reviews.llvm.org/D57264
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HOST_CLANG_CONF_OPTS += -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON
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CLANG_CONF_OPTS += -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=ON
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# This option is needed, otherwise multiple shared libs
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# (libclangAST.so, libclangBasic.so, libclangFrontend.so, etc.) will
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# be generated. As a final shared lib containing all these components
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# (libclang.so) is also generated, this resulted in the following
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# error when trying to use tools that use libclang:
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# $ CommandLine Error: Option 'track-memory' registered more than once!
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# $ LLVM ERROR: inconsistency in registered CommandLine options
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# By setting BUILD_SHARED_LIBS to OFF, we generate multiple static
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# libraries (the same way as host's clang build) and finally
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# libclang.so to be installed on the target.
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CLANG_CONF_OPTS += -DBUILD_SHARED_LIBS=OFF
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# Default is Debug build, which requires considerably more disk space
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# and build time. Release build is selected for host and target
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# because the linker can run out of memory in Debug mode.
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HOST_CLANG_CONF_OPTS += -DCMAKE_BUILD_TYPE=Release
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CLANG_CONF_OPTS += -DCMAKE_BUILD_TYPE=Release
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CLANG_CONF_OPTS += -DCMAKE_CROSSCOMPILING=1
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# We need to build tools because libclang is a tool
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HOST_CLANG_CONF_OPTS += -DCLANG_BUILD_TOOLS=ON
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CLANG_CONF_OPTS += -DCLANG_BUILD_TOOLS=ON
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HOST_CLANG_CONF_OPTS += \
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-DCLANG_BUILD_EXAMPLES=OFF \
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-DCLANG_INCLUDE_DOCS=OFF \
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-DCLANG_INCLUDE_TESTS=OFF
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CLANG_CONF_OPTS += \
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-DCLANG_BUILD_EXAMPLES=OFF \
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-DCLANG_INCLUDE_DOCS=OFF \
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-DCLANG_INCLUDE_TESTS=OFF
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HOST_CLANG_CONF_OPTS += -DLLVM_DIR=$(HOST_DIR)/lib/cmake/llvm \
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-DCLANG_DEFAULT_LINKER=$(TARGET_LD)
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CLANG_CONF_OPTS += -DLLVM_DIR=$(STAGING_DIR)/usr/lib/cmake/llvm \
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-DCLANG_TABLEGEN:FILEPATH=$(HOST_DIR)/bin/clang-tblgen \
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-DLLVM_TABLEGEN_EXE:FILEPATH=$(HOST_DIR)/bin/llvm-tblgen
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# Clang can't be used as compiler on the target since there are no
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# development files (headers) and other build tools. So remove clang
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# binaries and some other unnecessary files from target.
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CLANG_FILES_TO_REMOVE = \
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/usr/bin/clang* \
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/usr/bin/c-index-test \
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/usr/bin/git-clang-format \
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/usr/bin/scan-build \
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/usr/bin/scan-view \
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/usr/libexec/c++-analyzer \
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/usr/libexec/ccc-analyzer \
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/usr/share/clang \
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/usr/share/opt-viewer \
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/usr/share/scan-build \
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/usr/share/scan-view \
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/usr/share/man/man1/scan-build.1 \
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/usr/lib/clang
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define CLANG_CLEANUP_TARGET
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rm -rf $(addprefix $(TARGET_DIR),$(CLANG_FILES_TO_REMOVE))
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endef
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CLANG_POST_INSTALL_TARGET_HOOKS += CLANG_CLEANUP_TARGET
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# clang-tblgen is not installed by default, however it is necessary
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# for cross-compiling clang
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define HOST_CLANG_INSTALL_CLANG_TBLGEN
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$(INSTALL) -D -m 0755 $(HOST_CLANG_BUILDDIR)/bin/clang-tblgen \
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$(HOST_DIR)/bin/clang-tblgen
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endef
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HOST_CLANG_POST_INSTALL_HOOKS = HOST_CLANG_INSTALL_CLANG_TBLGEN
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# This option must be enabled to link libclang dynamically against libLLVM.so
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HOST_CLANG_CONF_OPTS += -DLLVM_LINK_LLVM_DYLIB=ON
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CLANG_CONF_OPTS += -DLLVM_LINK_LLVM_DYLIB=ON
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# Prevent clang binaries from linking against LLVM static libs
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HOST_CLANG_CONF_OPTS += -DLLVM_DYLIB_COMPONENTS=all
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CLANG_CONF_OPTS += -DLLVM_DYLIB_COMPONENTS=all
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$(eval $(cmake-package))
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$(eval $(host-cmake-package))
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