1OSX_MIN_VERSION=10.14 2OSX_SDK_VERSION=10.15.6 3XCODE_VERSION=12.1 4XCODE_BUILD_ID=12A7403 5LD64_VERSION=609 6 7OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers 8 9darwin_native_binutils=native_cctools 10 11ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),) 12# FORCE_USE_SYSTEM_CLANG is empty, so we use our depends-managed, pinned clang 13# from llvm.org 14 15# Clang is a dependency of native_cctools when FORCE_USE_SYSTEM_CLANG is empty 16darwin_native_toolchain=native_cctools 17 18clang_prog=$(build_prefix)/bin/clang 19clangxx_prog=$(clang_prog)++ 20 21clang_resource_dir=$(build_prefix)/lib/clang/$(native_clang_version) 22else 23# FORCE_USE_SYSTEM_CLANG is non-empty, so we use the clang from the user's 24# system 25 26darwin_native_toolchain= 27 28# We can't just use $(shell command -v clang) because GNU Make handles builtins 29# in a special way and doesn't know that `command` is a POSIX-standard builtin 30# prior to 1af314465e5dfe3e8baa839a32a72e83c04f26ef, first released in v4.2.90. 31# At the time of writing, GNU Make v4.2.1 is still being used in supported 32# distro releases. 33# 34# Source: https://lists.gnu.org/archive/html/bug-make/2017-11/msg00017.html 35clang_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang") 36clangxx_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang++") 37 38clang_resource_dir=$(shell clang -print-resource-dir) 39endif 40 41cctools_TOOLS=AR RANLIB STRIP NM LIBTOOL OTOOL INSTALL_NAME_TOOL 42 43# Make-only lowercase function 44lc = $(subst A,a,$(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,$1)))))))))))))))))))))))))) 45 46# For well-known tools provided by cctools, make sure that their well-known 47# variable is set to the full path of the tool, just like how AC_PATH_{TOO,PROG} 48# would. 49$(foreach TOOL,$(cctools_TOOLS),$(eval darwin_$(TOOL) = $$(build_prefix)/bin/$$(host)-$(call lc,$(TOOL)))) 50 51# Flag explanations: 52# 53# -mlinker-version 54# 55# Ensures that modern linker features are enabled. See here for more 56# details: https://github.com/bitcoin/bitcoin/pull/19407. 57# 58# -B$(build_prefix)/bin 59# 60# Explicitly point to our binaries (e.g. cctools) so that they are 61# ensured to be found and preferred over other possibilities. 62# 63# -stdlib=libc++ -stdlib++-isystem$(OSX_SDK)/usr/include/c++/v1 64# 65# Forces clang to use the libc++ headers from our SDK and completely 66# forget about the libc++ headers from the standard directories 67# 68# -Xclang -*system<path_a> \ 69# -Xclang -*system<path_b> \ 70# -Xclang -*system<path_c> ... 71# 72# Adds path_a, path_b, and path_c to the bottom of clang's list of 73# include search paths. This is used to explicitly specify the list of 74# system include search paths and its ordering, rather than rely on 75# clang's autodetection routine. This routine has been shown to: 76# 1. Fail to pickup libc++ headers in $SYSROOT/usr/include/c++/v1 77# when clang was built manually (see: https://github.com/bitcoin/bitcoin/pull/17919#issuecomment-656785034) 78# 2. Fail to pickup C headers in $SYSROOT/usr/include when 79# C_INCLUDE_DIRS was specified at configure time (see: https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9) 80# 81# Talking directly to cc1 with -Xclang here grants us access to specify 82# more granular categories for these system include search paths, and we 83# can use the correct categories that these search paths would have been 84# placed in if the autodetection routine had worked correctly. (see: 85# https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9#the-treatment) 86# 87# Furthermore, it places these search paths after any "non-Xclang" 88# specified search paths. This prevents any additional clang options or 89# environment variables from coming after or in between these system 90# include search paths, as that would be wrong in general but would also 91# break #include_next's. 92# 93darwin_CC=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \ 94 -u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \ 95 -u LIBRARY_PATH \ 96 $(clang_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \ 97 -B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \ 98 -isysroot$(OSX_SDK) \ 99 -Xclang -internal-externc-isystem$(clang_resource_dir)/include \ 100 -Xclang -internal-externc-isystem$(OSX_SDK)/usr/include 101darwin_CXX=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \ 102 -u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \ 103 -u LIBRARY_PATH \ 104 $(clangxx_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \ 105 -B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \ 106 -isysroot$(OSX_SDK) \ 107 -stdlib=libc++ \ 108 -stdlib++-isystem$(OSX_SDK)/usr/include/c++/v1 \ 109 -Xclang -internal-externc-isystem$(clang_resource_dir)/include \ 110 -Xclang -internal-externc-isystem$(OSX_SDK)/usr/include 111 112darwin_CFLAGS=-pipe 113darwin_CXXFLAGS=$(darwin_CFLAGS) 114 115darwin_release_CFLAGS=-O2 116darwin_release_CXXFLAGS=$(darwin_release_CFLAGS) 117 118darwin_debug_CFLAGS=-O1 119darwin_debug_CXXFLAGS=$(darwin_debug_CFLAGS) 120 121darwin_cmake_system=Darwin 122