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| author | Ben Gamari <ben@smart-cactus.org> | 2021-04-02 11:52:47 -0400 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-05-05 05:42:38 -0400 |
| commit | 7ffbdc3fa603c6411249ba9b758cf8f109c5fb30 (patch) | |
| tree | 8a05d6e03ce2790e6e59651c824e569fee088d33 /m4/get_arm_isa.m4 | |
| parent | 6acadb79afe685c635fd255f90551a0fbfcbe3dc (diff) | |
| download | haskell-7ffbdc3fa603c6411249ba9b758cf8f109c5fb30.tar.gz | |
Break up aclocal.m4
Diffstat (limited to 'm4/get_arm_isa.m4')
| -rw-r--r-- | m4/get_arm_isa.m4 | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/m4/get_arm_isa.m4 b/m4/get_arm_isa.m4 new file mode 100644 index 0000000000..9b458bb09f --- /dev/null +++ b/m4/get_arm_isa.m4 @@ -0,0 +1,117 @@ +# GET_ARM_ISA +# ---------------------------------- +# Get info about the ISA on the ARM arch +AC_DEFUN([GET_ARM_ISA], +[ + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM( + [], + [#if defined(__ARM_ARCH_2__) || \ + defined(__ARM_ARCH_3__) || \ + defined(__ARM_ARCH_3M__) || \ + defined(__ARM_ARCH_4__) || \ + defined(__ARM_ARCH_4T__) || \ + defined(__ARM_ARCH_5__) || \ + defined(__ARM_ARCH_5T__) || \ + defined(__ARM_ARCH_5E__) || \ + defined(__ARM_ARCH_5TE__) + return 0; + #else + not pre arm v6 + #endif] + )], + [AC_DEFINE(arm_HOST_ARCH_PRE_ARMv6, 1, [ARM pre v6]) + AC_DEFINE(arm_HOST_ARCH_PRE_ARMv7, 1, [ARM pre v7]) + changequote(, )dnl + ARM_ISA=ARMv5 + ARM_ISA_EXT="[]" + changequote([, ])dnl + ], + [ + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM( + [], + [#if defined(__ARM_ARCH_6__) || \ + defined(__ARM_ARCH_6J__) || \ + defined(__ARM_ARCH_6T2__) || \ + defined(__ARM_ARCH_6Z__) || \ + defined(__ARM_ARCH_6ZK__) || \ + defined(__ARM_ARCH_6K__) || \ + defined(__ARM_ARCH_6KZ__) || \ + defined(__ARM_ARCH_6M__) + return 0; + #else + not pre arm v7 + #endif] + )], + [AC_DEFINE(arm_HOST_ARCH_PRE_ARMv7, 1, [ARM pre v7]) + if grep -q Raspbian /etc/issue && uname -m | grep -q armv7; then + # Raspbian unfortunately makes some extremely questionable + # packaging decisions, configuring gcc to compile for ARMv6 + # despite the fact that the RPi4 is ARMv8. As ARMv8 doesn't + # support all instructions supported by ARMv6 this can + # break. Work around this by checking uname to verify + # that we aren't running on armv7. + # See #17856. + AC_MSG_NOTICE([Found compiler which claims to target ARMv6 running on ARMv7, assuming this is ARMv7 on Raspbian (see T17856)]) + ARM_ISA=ARMv7 + changequote(, )dnl + ARM_ISA_EXT="[VFPv2]" + changequote([, ])dnl + else + ARM_ISA=ARMv6 + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM( + [], + [#if defined(__VFP_FP__) + return 0; + #else + no vfp + #endif] + )], + [changequote(, )dnl + ARM_ISA_EXT="[VFPv2]" + changequote([, ])dnl + ], + [changequote(, )dnl + ARM_ISA_EXT="[]" + changequote([, ])dnl + ] + ) + fi], + [changequote(, )dnl + ARM_ISA=ARMv7 + ARM_ISA_EXT="[VFPv3,NEON]" + changequote([, ])dnl + ]) + ]) + + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [], + [#if defined(__SOFTFP__) + return 0; + #else + not softfp + #endif] + )], + [changequote(, )dnl + ARM_ABI="SOFT" + changequote([, ])dnl + ], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [], + [#if defined(__ARM_PCS_VFP) + return 0; + #else + no hard float ABI + #endif] + )], + [ARM_ABI="HARD"], + [ARM_ABI="SOFTFP"] + )] + ) + + AC_SUBST(ARM_ISA) +]) |