aboutsummaryrefslogtreecommitdiff
path: root/depends/hosts/darwin.mk
blob: 08d81cbc997370c058b08f75f013fb430b97e152 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
OSX_MIN_VERSION=10.15
OSX_SDK_VERSION=11.0
XCODE_VERSION=12.2
XCODE_BUILD_ID=12B45b
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)++
llvm_config_prog=$(build_prefix)/bin/llvm-config

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) $(.SHELLFLAGS) "command -v clang++")
llvm_config_prog=$(shell $(SHELL) $(.SHELLFLAGS) "command -v llvm-config")

clang_resource_dir=$(shell clang -print-resource-dir)
llvm_lib_dir=$(shell $(llvm_config_prog) --libdir)
endif

cctools_TOOLS=AR RANLIB STRIP NM LIBTOOL OTOOL INSTALL_NAME_TOOL DSYMUTIL

# 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$(build_prefix)/bin
#
#         Explicitly point to our binaries (e.g. cctools) so that they are
#         ensured to be found and preferred over other possibilities.
#
#     -stdlib++-isystem$(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 -Xclang $(clang_resource_dir)/include \
              -Xclang -internal-externc-isystem -Xclang $(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++-isystem$(OSX_SDK)/usr/include/c++/v1 \
               -Xclang -internal-externc-isystem -Xclang $(clang_resource_dir)/include \
               -Xclang -internal-externc-isystem -Xclang $(OSX_SDK)/usr/include

darwin_CFLAGS=-pipe -std=$(C_STANDARD)
darwin_CXXFLAGS=-pipe -std=$(CXX_STANDARD)

ifneq ($(LTO),)
darwin_CFLAGS += -flto
darwin_CXXFLAGS += -flto
darwin_LDFLAGS += -flto
endif

darwin_release_CFLAGS=-O2
darwin_release_CXXFLAGS=$(darwin_release_CFLAGS)

darwin_debug_CFLAGS=-O1
darwin_debug_CXXFLAGS=$(darwin_debug_CFLAGS)

darwin_cmake_system=Darwin