diff options
Diffstat (limited to 'depends/hosts/darwin.mk')
| -rw-r--r-- | depends/hosts/darwin.mk | 97 |
1 files changed, 87 insertions, 10 deletions
diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk index e9faeba336..646e97837a 100644 --- a/depends/hosts/darwin.mk +++ b/depends/hosts/darwin.mk @@ -6,6 +6,49 @@ LD64_VERSION=530 OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers +darwin_native_binutils=native_cctools + +ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),) +# FORCE_USE_SYSTEM_CLANG is empty, so we use our depends-managed, pinned clang +# from llvm.org + +# The native_cctools package is what provides clang when FORCE_USE_SYSTEM_CLANG +# is empty +darwin_native_toolchain=native_cctools + +clang_prog=$(build_prefix)/bin/clang +clangxx_prog=$(clang_prog)++ + +clang_resource_dir=$(build_prefix)/lib/clang/$(native_cctools_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 @@ -18,7 +61,7 @@ OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with- # Explicitly point to our binaries (e.g. cctools) so that they are # ensured to be found and preferred over other possibilities. # -# -nostdinc++ -isystem $(OSX_SDK)/usr/include/c++/v1 +# -stdlib=libc++ -nostdinc++ -Xclang -cxx-isystem$(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 @@ -28,8 +71,49 @@ OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with- # https://reviews.llvm.org/D64089, we should use that instead. Read the # differential summary there for more details. # -darwin_CC=clang -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -mlinker-version=$(LD64_VERSION) -B$(build_prefix)/bin -darwin_CXX=clang++ -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -stdlib=libc++ -mlinker-version=$(LD64_VERSION) -B$(build_prefix)/bin -nostdinc++ -isystem $(OSX_SDK)/usr/include/c++/v1 +# -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=$(LD64_VERSION) \ + --sysroot=$(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=$(LD64_VERSION) \ + --sysroot=$(OSX_SDK) \ + -stdlib=libc++ -nostdinc++ \ + -Xclang -cxx-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) @@ -40,11 +124,4 @@ darwin_release_CXXFLAGS=$(darwin_release_CFLAGS) darwin_debug_CFLAGS=-O1 darwin_debug_CXXFLAGS=$(darwin_debug_CFLAGS) -darwin_native_binutils=native_cctools -ifeq ($(strip $(FORCE_USE_SYSTEM_CLANG)),) -darwin_native_toolchain=native_cctools -else -darwin_native_toolchain= -endif - darwin_cmake_system=Darwin |