src/compiler-rt/make/platform/triple.mk

   1 # This "platform" file is intended for building compiler-rt using gcc.
   2 # The actual target platform is selected by setting the TargetTriple variable to the corresponding LLVM triple.
   3
   4 Description := Static runtime libraries for platforms selected by 'TargetTriple'
   5
   6 # Provide defaults for the required vars
   7 ifndef CC
   8         CC := gcc
   9 endif
  10 ifndef CFLAGS
  11         CFLAGS := -Wall -O3
  12 endif
  13
  14 Configs := builtins
  15
  16 Arch := $(word 1,$(subst -, ,$(TargetTriple)))
  17 ifeq ($(Arch),i686)
  18         Arch := i386
  19 else ifeq ($(Arch),arm)
  20 ifneq (,$(findstring ios,$(TargetTriple)))
  21         Arch := armv7
  22 else ifneq (,$(findstring android,$(TargetTriple)))
  23         Arch := armv7
  24 endif
  25 endif
  26
  27 # Filter out stuff that gcc cannot compile (these are only needed for clang-generated code anywasys).
  28 CommonFunctions_gcc := $(filter-out atomic% enable_execute_stack,$(CommonFunctions))
  29
  30 # Filter out stuff which is not available on specific target
  31 # For example, sync_fetch_and_add_4 uses Thumb instructions, which are unavailable
  32 # when building for arm-linux-androideabi
  33 ifeq ($(TargetTriple),arm-linux-androideabi)
  34     ArchDisabledFunctions := \
  35                 sync_fetch_and_add_4 \
  36                 sync_fetch_and_sub_4 \
  37                 sync_fetch_and_and_4 \
  38                 sync_fetch_and_or_4 \
  39                 sync_fetch_and_xor_4 \
  40                 sync_fetch_and_nand_4 \
  41                 sync_fetch_and_max_4 \
  42                 sync_fetch_and_umax_4 \
  43                 sync_fetch_and_min_4 \
  44                 sync_fetch_and_umin_4 \
  45                 sync_fetch_and_add_8 \
  46                 sync_fetch_and_sub_8 \
  47                 sync_fetch_and_and_8 \
  48                 sync_fetch_and_or_8 \
  49                 sync_fetch_and_xor_8 \
  50                 sync_fetch_and_nand_8 \
  51                 sync_fetch_and_max_8 \
  52                 sync_fetch_and_umax_8 \
  53                 sync_fetch_and_min_8 \
  54                 sync_fetch_and_umin_8
  55 endif
  56
  57 # Disable emutls on MIPS
  58 # Rust uses GCC 4.4 to cross-compile, which doesn't have some builtins
  59 ifneq (,$(findstring mips,$(TargetTriple)))
  60     CommonDisabledFunctions := emutls
  61 endif
  62
  63 # Disable emutls on Windows
  64 # emutls works on POSIX only as it uses pthreads
  65 ifneq (,$(findstring windows,$(TargetTriple)))
  66     CommonDisabledFunctions := emutls
  67 endif
  68
  69 # Clear cache is builtin on aarch64-apple-ios
  70 # arm64 and aarch64 are synonims, but iOS targets usually use arm64 (history reasons)
  71 ifeq (aarch64-apple-ios,$(subst arm64,aarch64,$(TargetTriple)))
  72 CommonDisabledFunctions := clear_cache
  73 endif
  74
  75 ArchEnabledFunctions := $(filter-out $(ArchDisabledFunctions),$(value ArchFunctions.$(Arch)))
  76 CommonEnabledFunctions := $(filter-out $(CommonDisabledFunctions),$(CommonFunctions_gcc))
  77
  78 FUNCTIONS.builtins := $(CommonEnabledFunctions) $(ArchEnabledFunctions)