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OSX_MIN_VERSION=10.14
OSX_SDK_VERSION=10.15.6
XCODE_VERSION=12.1
XCODE_BUILD_ID=12A7403
LD64_VERSION=609
OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers
darwin_native_binutils=native_cctools
ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),)
# FORCE_USE_SYSTEM_CLANG is empty, so we use our depends-managed, pinned clang
# from llvm.org
# Clang is a dependency of native_cctools when FORCE_USE_SYSTEM_CLANG is empty
darwin_native_toolchain=native_cctools
clang_prog=$(build_prefix)/bin/clang
clangxx_prog=$(clang_prog)++
clang_resource_dir=$(build_prefix)/lib/clang/$(native_clang_version)
else
# FORCE_USE_SYSTEM_CLANG is non-empty, so we use the clang from the user's
# system
darwin_native_toolchain=
# We can't just use $(shell command -v clang) because GNU Make handles builtins
# in a special way and doesn't know that `command` is a POSIX-standard builtin
# prior to 1af314465e5dfe3e8baa839a32a72e83c04f26ef, first released in v4.2.90.
# At the time of writing, GNU Make v4.2.1 is still being used in supported
# distro releases.
#
# Source: https://lists.gnu.org/archive/html/bug-make/2017-11/msg00017.html
clang_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang")
clangxx_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v clang++")
clang_resource_dir=$(shell clang -print-resource-dir)
endif
cctools_TOOLS=AR RANLIB STRIP NM LIBTOOL OTOOL INSTALL_NAME_TOOL
# Make-only lowercase function
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))))))))))))))))))))))))))
# For well-known tools provided by cctools, make sure that their well-known
# variable is set to the full path of the tool, just like how AC_PATH_{TOO,PROG}
# would.
$(foreach TOOL,$(cctools_TOOLS),$(eval darwin_$(TOOL) = $$(build_prefix)/bin/$$(host)-$(call lc,$(TOOL))))
# Flag explanations:
#
# -mlinker-version
#
# Ensures that modern linker features are enabled. See here for more
# details: https://github.com/bitcoin/bitcoin/pull/19407.
#
# -B$(build_prefix)/bin
#
# Explicitly point to our binaries (e.g. cctools) so that they are
# ensured to be found and preferred over other possibilities.
#
# -stdlib=libc++ -stdlib++-isystem$(OSX_SDK)/usr/include/c++/v1
#
# Forces clang to use the libc++ headers from our SDK and completely
# forget about the libc++ headers from the standard directories
#
# -Xclang -*system<path_a> \
# -Xclang -*system<path_b> \
# -Xclang -*system<path_c> ...
#
# Adds path_a, path_b, and path_c to the bottom of clang's list of
# include search paths. This is used to explicitly specify the list of
# system include search paths and its ordering, rather than rely on
# clang's autodetection routine. This routine has been shown to:
# 1. Fail to pickup libc++ headers in $SYSROOT/usr/include/c++/v1
# when clang was built manually (see: https://github.com/bitcoin/bitcoin/pull/17919#issuecomment-656785034)
# 2. Fail to pickup C headers in $SYSROOT/usr/include when
# C_INCLUDE_DIRS was specified at configure time (see: https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9)
#
# Talking directly to cc1 with -Xclang here grants us access to specify
# more granular categories for these system include search paths, and we
# can use the correct categories that these search paths would have been
# placed in if the autodetection routine had worked correctly. (see:
# https://gist.github.com/dongcarl/5cdc6990b7599e8a5bf6d2a9c70e82f9#the-treatment)
#
# Furthermore, it places these search paths after any "non-Xclang"
# specified search paths. This prevents any additional clang options or
# environment variables from coming after or in between these system
# include search paths, as that would be wrong in general but would also
# break #include_next's.
#
darwin_CC=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
-u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
-u LIBRARY_PATH \
$(clang_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \
-B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \
-isysroot$(OSX_SDK) \
-Xclang -internal-externc-isystem$(clang_resource_dir)/include \
-Xclang -internal-externc-isystem$(OSX_SDK)/usr/include
darwin_CXX=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
-u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
-u LIBRARY_PATH \
$(clangxx_prog) --target=$(host) -mmacosx-version-min=$(OSX_MIN_VERSION) \
-B$(build_prefix)/bin -mlinker-version=$(LD64_VERSION) \
-isysroot$(OSX_SDK) \
-stdlib=libc++ \
-stdlib++-isystem$(OSX_SDK)/usr/include/c++/v1 \
-Xclang -internal-externc-isystem$(clang_resource_dir)/include \
-Xclang -internal-externc-isystem$(OSX_SDK)/usr/include
darwin_CFLAGS=-pipe
darwin_CXXFLAGS=$(darwin_CFLAGS)
darwin_release_CFLAGS=-O2
darwin_release_CXXFLAGS=$(darwin_release_CFLAGS)
darwin_debug_CFLAGS=-O1
darwin_debug_CXXFLAGS=$(darwin_debug_CFLAGS)
darwin_cmake_system=Darwin
|
