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100 lines
4.4 KiB
100 lines
4.4 KiB
OSX_MIN_VERSION=10.14
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OSX_SDK_VERSION=10.15.1
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XCODE_VERSION=11.3.1
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XCODE_BUILD_ID=11C505
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LD64_VERSION=530
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OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers
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ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
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clang_resource_dir=$(build_prefix)/lib/clang/$(native_cctools_clang_version)
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else
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clang_resource_dir=$(shell clang -print-resource-dir)
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endif
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# Flag explanations:
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#
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# -mlinker-version
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#
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# Ensures that modern linker features are enabled. See here for more
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# details: https://github.com/bitcoin/bitcoin/pull/19407.
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#
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# -B$(build_prefix)/bin
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#
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# Explicitly point to our binaries (e.g. cctools) so that they are
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# ensured to be found and preferred over other possibilities.
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#
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# -stdlib=libc++ -nostdinc++ -Xclang -cxx-isystem$(OSX_SDK)/usr/include/c++/v1
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#
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# Forces clang to use the libc++ headers from our SDK and completely
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# forget about the libc++ headers from the standard directories
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#
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# TODO: Once we start requiring a clang version that has the
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# -stdlib++-isystem<directory> flag first introduced here:
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# https://reviews.llvm.org/D64089, we should use that instead. Read the
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# differential summary there for more details.
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#
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# -Xclang -*system<path_a> \
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# -Xclang -*system<path_b> \
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# -Xclang -*system<path_c> ...
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#
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# Adds path_a, path_b, and path_c to the bottom of clang's list of
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# include search paths. This is used to explicitly specify the list of
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# system include search paths and its ordering, rather than rely on
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# clang's autodetection routine. This routine has been shown to:
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# 1. Fail to pickup libc++ headers in $SYSROOT/usr/include/c++/v1
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# when clang was built manually (see: https://github.com/bitcoin/bitcoin/pull/17919#issuecomment-656785034)
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# 2. Fail to pickup C headers in $SYSROOT/usr/include when
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# C_INCLUDE_DIRS was specified at configure time (see: https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9)
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#
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# Talking directly to cc1 with -Xclang here grants us access to specify
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# more granular categories for these system include search paths, and we
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# can use the correct categories that these search paths would have been
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# placed in if the autodetection routine had worked correctly. (see:
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# https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9#the-treatment)
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#
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# Furthermore, it places these search paths after any "non-Xclang"
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# specified search paths. This prevents any additional clang options or
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# environment variables from coming after or in between these system
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# include search paths, as that would be wrong in general but would also
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# break #include_next's.
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#
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darwin_CC=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
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-u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
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-u LIBRARY_PATH \
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clang --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \
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-B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \
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-fuse-ld=$(build_prefix)/bin/x86_64-apple-darwin16-ld \
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--sysroot=$(OSX_SDK) \
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-Xclang -internal-externc-isystem$(clang_resource_dir)/include \
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-Xclang -internal-externc-isystem$(OSX_SDK)/usr/include
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darwin_CXX=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
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-u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
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-u LIBRARY_PATH \
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clang++ --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \
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-B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \
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-fuse-ld=$(build_prefix)/bin/x86_64-apple-darwin16-ld \
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--sysroot=$(OSX_SDK) \
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-stdlib=libc++ -nostdinc++ \
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-Xclang -cxx-isystem$(OSX_SDK)/usr/include/c++/v1 \
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-Xclang -internal-externc-isystem$(clang_resource_dir)/include \
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-Xclang -internal-externc-isystem$(OSX_SDK)/usr/include
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darwin_CFLAGS=-pipe
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darwin_CXXFLAGS=$(darwin_CFLAGS)
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darwin_release_CFLAGS=-O2
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darwin_release_CXXFLAGS=$(darwin_release_CFLAGS)
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darwin_debug_CFLAGS=-O1
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darwin_debug_CXXFLAGS=$(darwin_debug_CFLAGS)
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darwin_native_binutils=native_cctools
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ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
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darwin_native_toolchain=native_cctools
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else
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darwin_native_toolchain=
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endif
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darwin_cmake_system=Darwin
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