1Description := Static runtime libraries for clang/Linux.
2
3###
4
5CC := clang
6Arch := unknown
7Configs :=
8
9# We don't currently have any general purpose way to target architectures other
10# than the compiler defaults (because there is no generalized way to invoke
11# cross compilers). For now, we just find the target architecture of the
12# compiler and only define configurations we know that compiler can generate.
13CompilerTargetTriple := $(shell \
14	LANG=C $(CC) -v 2>&1 | grep 'Target:' | cut -d' ' -f2)
15ifeq ($(CompilerTargetTriple),)
16$(error "unable to infer compiler target triple for $(CC)")
17endif
18
19# Only define configs if we detected a linux target.
20ifneq ($(findstring -linux-,$(CompilerTargetTriple)),)
21
22# Define configs only if arch in triple is i386 or x86_64
23CompilerTargetArch := $(firstword $(subst -, ,$(CompilerTargetTriple)))
24ifeq ($(call contains,i386 x86_64,$(CompilerTargetArch)),true)
25
26# TryCompile compiler source flags
27# Returns exit code of running a compiler invocation.
28TryCompile = \
29  $(shell \
30    cflags=""; \
31    for flag in $(3); do \
32      cflags="$$cflags $$flag"; \
33    done; \
34    $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \
35    echo $$?)
36
37test_source = $(ProjSrcRoot)/make/platform/clang_linux_test_input.c
38ifeq ($(CompilerTargetArch),i386)
39  SupportedArches := i386
40  ifeq ($(call TryCompile,$(CC),$(test_source),-m64),0)
41    SupportedArches += x86_64
42  endif
43else
44  SupportedArches := x86_64
45  ifeq ($(call TryCompile,$(CC),$(test_source),-m32),0)
46    SupportedArches += i386
47  endif
48endif
49
50# Build runtime libraries for i386.
51ifeq ($(call contains,$(SupportedArches),i386),true)
52Configs += builtins-i386 profile-i386
53Arch.builtins-i386 := i386
54Arch.profile-i386 := i386
55endif
56
57# Build runtime libraries for x86_64.
58ifeq ($(call contains,$(SupportedArches),x86_64),true)
59Configs += builtins-x86_64 profile-x86_64
60Arch.builtins-x86_64 := x86_64
61Arch.profile-x86_64 := x86_64
62endif
63
64endif
65
66endif
67
68###
69
70CFLAGS := -Wall -Werror -O3 -fomit-frame-pointer
71
72CFLAGS.builtins-i386 := $(CFLAGS) -m32
73CFLAGS.builtins-x86_64 := $(CFLAGS) -m64
74CFLAGS.profile-i386 := $(CFLAGS) -m32
75CFLAGS.profile-x86_64 := $(CFLAGS) -m64
76
77FUNCTIONS.builtins-i386 := $(CommonFunctions) $(ArchFunctions.i386)
78FUNCTIONS.builtins-x86_64 := $(CommonFunctions) $(ArchFunctions.x86_64)
79FUNCTIONS.profile-i386 := GCDAProfiling InstrProfiling InstrProfilingBuffer \
80                          InstrProfilingFile InstrProfilingPlatformOther \
81                          InstrProfilingRuntime
82FUNCTIONS.profile-x86_64 := $(FUNCTIONS.profile-i386)
83
84# Always use optimized variants.
85OPTIMIZED := 1
86
87# We don't need to use visibility hidden on Linux.
88VISIBILITY_HIDDEN := 0
89
90SHARED_LIBRARY_SUFFIX := so
91