gcc/config/arm/t-arm-elf

   1 # Copyright (C) 1998-2018 Free Software Foundation, Inc.
   2 #
   3 # This file is part of GCC.
   4 #
   5 # GCC is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3, or (at your option)
   8 # any later version.
   9 #
  10 # GCC is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with GCC; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 # Build a very basic set of libraries that should cater for most cases.
  20
  21 # Single-precision floating-point is NOT supported; we don't build a
  22 # suitable library for that.  Use the rm-profile config in that case.
  23
  24 # PART 1 - Useful groups of options
  25
  26 dp_fpus         := vfp vfpv2 vfpv3 vfpv3-fp16 vfpv3-d16 vfpv3-d16-fp16 \
  27                    neon neon-vfpv3 neon-fp16 vfpv4 neon-vfpv4 vfpv4-d16 \
  28                    fpv5-d16 fp-armv8 neon-fp-armv8 crypto-neon-fp-armv8 \
  29                    vfp3
  30
  31 sp_fpus         := vfpv3xd vfpv3xd-fp16  fpv4-sp-d16 fpv5-sp-d16
  32
  33 v7a_fps         := vfpv3 vfpv3-fp16 vfpv4 simd neon-fp16 neon-vfpv4
  34 v7ve_fps        := vfpv3-d16 vfpv3 vfpv3-d16-fp16 vfpv3-fp16 vfpv4 neon \
  35                    neon-fp16 simd
  36
  37 # Not all these permutations exist for all architecture variants, but
  38 # it seems to work ok.
  39 v8_fps          := simd fp16 crypto fp16+crypto dotprod fp16fml
  40
  41 # We don't do anything special with these.  Pre-v4t probably doesn't work.
  42 all_early_nofp  := armv2 armv2a armv3 armv3m armv4 armv4t armv5t
  43
  44 all_early_arch  := armv5tej armv6 armv6j armv6k armv6z armv6kz \
  45                    armv6zk armv6t2 iwmmxt iwmmxt2
  46
  47 all_v7_a_r      := armv7-a armv7ve armv7-r
  48
  49 all_v8_archs    := armv8-a armv8-a+crc armv8.1-a armv8.2-a armv8.3-a armv8.4-a
  50
  51 # No floating point variants, require thumb1 softfp
  52 all_nofp_t      := armv6-m armv6s-m armv8-m.base
  53
  54 all_nofp_t2     := armv7-m
  55
  56 all_sp_only     := armv7e-m armv8-m.main
  57
  58 MULTILIB_OPTIONS     =
  59 MULTILIB_DIRNAMES    =
  60 MULTILIB_EXCEPTIONS  =
  61 MULTILIB_MATCHES     =
  62 MULTILIB_REUSE       =
  63
  64 # PART 2 - multilib build rules
  65
  66 MULTILIB_OPTIONS     += marm/mthumb
  67 MULTILIB_DIRNAMES    += arm thumb
  68
  69 MULTILIB_OPTIONS     += mfpu=auto
  70 MULTILIB_DIRNAMES    += autofp
  71
  72 MULTILIB_OPTIONS     += march=armv5te+fp/march=armv7+fp
  73 MULTILIB_DIRNAMES    += v5te v7
  74
  75 MULTILIB_OPTIONS     += mfloat-abi=hard
  76 MULTILIB_DIRNAMES    += fpu
  77
  78 # Build a total of 4 library variants (base options plus the following):
  79 MULTILIB_REQUIRED    += mthumb
  80 MULTILIB_REQUIRED    += marm/mfpu=auto/march=armv5te+fp/mfloat-abi=hard
  81 MULTILIB_REQUIRED    += mthumb/mfpu=auto/march=armv7+fp/mfloat-abi=hard
  82
  83 # PART 3 - Match rules
  84
  85 # Map all supported FPUs onto mfpu=auto
  86 MULTILIB_MATCHES     += $(foreach FPU, $(dp_fpus), \
  87                           mfpu?auto=mfpu?$(FPU))
  88
  89 MULTILIB_MATCHES     += march?armv5te+fp=march?armv5te
  90
  91 MULTILIB_MATCHES     += $(foreach ARCH, $(all_early_arch), \
  92                           march?armv5te+fp=march?$(ARCH) \
  93                           march?armv5te+fp=march?$(ARCH)+fp)
  94
  95 MULTILIB_MATCHES     += march?armv7+fp=march?armv7
  96
  97 MULTILIB_MATCHES     += $(foreach FPARCH, $(v7a_fps), \
  98                           march?armv7+fp=march?armv7-a+$(FPARCH))
  99
 100 MULTILIB_MATCHES     += $(foreach FPARCH, $(v7ve_fps), \
 101                           march?armv7+fp=march?armv7ve+$(FPARCH))
 102
 103 MULTILIB_MATCHES     += $(foreach ARCH, $(all_v7_a_r), \
 104                           march?armv7+fp=march?$(ARCH) \
 105                           march?armv7+fp=march?$(ARCH)+fp)
 106
 107 MULTILIB_MATCHES     += $(foreach ARCH, $(all_v8_archs), \
 108                           march?armv7+fp=march?$(ARCH) \
 109                           $(foreach FPARCH, $(v8_fps), \
 110                             march?armv7+fp=march?$(ARCH)+$(FPARCH)))
 111
 112 MULTILIB_MATCHES     += $(foreach ARCH, armv7e-m armv8-m.mainline, \
 113                           march?armv7+fp=march?$(ARCH)+fp.dp)
 114
 115 # PART 4 - Reuse rules
 116
 117 MULTILIB_REUSE       += mthumb=mthumb/mfpu.auto
 118 MULTILIB_REUSE       += mthumb=mthumb/mfpu.auto/march.armv5te+fp
 119 MULTILIB_REUSE       += mthumb=mthumb/march.armv5te+fp
 120 MULTILIB_REUSE       += marm/mfpu.auto/march.armv5te+fp/mfloat-abi.hard=marm/march.armv5te+fp/mfloat-abi.hard
 121 MULTILIB_REUSE       += marm/mfpu.auto/march.armv5te+fp/mfloat-abi.hard=march.armv5te+fp/mfloat-abi.hard
 122 MULTILIB_REUSE       += marm/mfpu.auto/march.armv5te+fp/mfloat-abi.hard=mfpu.auto/march.armv5te+fp/mfloat-abi.hard
 123 MULTILIB_REUSE       += mthumb/mfpu.auto/march.armv7+fp/mfloat-abi.hard=mthumb/march.armv7+fp/mfloat-abi.hard
 124 MULTILIB_REUSE       += mthumb/mfpu.auto/march.armv7+fp/mfloat-abi.hard=mfpu.auto/march.armv7+fp/mfloat-abi.hard
 125 MULTILIB_REUSE       += mthumb/mfpu.auto/march.armv7+fp/mfloat-abi.hard=march.armv7+fp/mfloat-abi.hard