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121 lines
5.4 KiB
121 lines
5.4 KiB
OSX_MIN_VERSION=10.14 |
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OSX_SDK_VERSION=10.15.6 |
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XCODE_VERSION=12.1 |
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XCODE_BUILD_ID=12A7403 |
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LD64_VERSION=609 |
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OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers |
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darwin_native_binutils=native_cctools |
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ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),) |
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# FORCE_USE_SYSTEM_CLANG is empty, so we use our depends-managed, pinned clang |
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# from llvm.org |
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# Clang is a dependency of native_cctools when FORCE_USE_SYSTEM_CLANG is empty |
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darwin_native_toolchain=native_cctools |
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clang_prog=$(build_prefix)/bin/clang |
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clangxx_prog=$(clang_prog)++ |
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clang_resource_dir=$(build_prefix)/lib/clang/$(native_clang_version) |
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else |
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# FORCE_USE_SYSTEM_CLANG is non-empty, so we use the clang from the user's |
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# system |
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darwin_native_toolchain= |
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# We can't just use $(shell command -v clang) because GNU Make handles builtins |
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# in a special way and doesn't know that `command` is a POSIX-standard builtin |
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# prior to 1af314465e5dfe3e8baa839a32a72e83c04f26ef, first released in v4.2.90. |
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# At the time of writing, GNU Make v4.2.1 is still being used in supported |
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# distro releases. |
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# |
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# Source: https://lists.gnu.org/archive/html/bug-make/2017-11/msg00017.html |
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clang_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang") |
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clangxx_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang++") |
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clang_resource_dir=$(shell clang -print-resource-dir) |
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endif |
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cctools_TOOLS=AR RANLIB STRIP NM LIBTOOL OTOOL INSTALL_NAME_TOOL |
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# Make-only lowercase function |
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lc = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$1)))))))))))))))))))))))))) |
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# For well-known tools provided by cctools, make sure that their well-known |
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# variable is set to the full path of the tool, just like how AC_PATH_{TOO,PROG} |
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# would. |
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$(foreach TOOL,$(cctools_TOOLS),$(eval darwin_$(TOOL) = $$(build_prefix)/bin/$$(host)-$(call lc,$(TOOL)))) |
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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$(build_prefix)/bin |
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# |
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# Explicitly point to our binaries (e.g. cctools) so that they are |
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# ensured to be found and preferred over other possibilities. |
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# |
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# -stdlib=libc++ -stdlib++-isystem$(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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# -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_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \ |
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-B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \ |
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-isysroot$(OSX_SDK) \ |
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-Xclang -internal-externc-isystem$(clang_resource_dir)/include \ |
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-Xclang -internal-externc-isystem$(OSX_SDK)/usr/include |
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darwin_CXX=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \ |
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-u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \ |
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-u LIBRARY_PATH \ |
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$(clangxx_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \ |
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-B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \ |
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-isysroot$(OSX_SDK) \ |
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-stdlib=libc++ \ |
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-stdlib++-isystem$(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_cmake_system=Darwin
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