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add -mstrict-align flag with armasm

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This commit is contained in:
Jacob Barthelmeh
2018-12-17 17:12:14 -07:00
parent b60918b8cd
commit 412966ed80
1 changed files with 17 additions and 1 deletions
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18
configure.ac
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@@ -968,8 +968,24 @@ then
*) *)
case $host_cpu in case $host_cpu in
*aarch64*) *aarch64*)
#+crypto needed for hardware acceleration # +crypto needed for hardware acceleration
AM_CPPFLAGS="$AM_CPPFLAGS -mcpu=generic+crypto" AM_CPPFLAGS="$AM_CPPFLAGS -mcpu=generic+crypto"
# Check for and set -mstrict-align compiler flag
# Used to set assumption that Aarch64 systems will not handle
# unaligned memory references. The flag -mstrict-align is needed
# on some compiler versions to avoid an invalid addressing mode
# error with "m" constraint variables in the inline assembly AES
# code. Even though unaligned load/store access is permitted on
# normal memory with Cortex-A series boards with the exception
# being exclusive and ordered access.
case $CPPFLAGS in
*mstrict-align*)
break;; # already set by user
*)
AM_CPPFLAGS="$AM_CPPFLAGS -mstrict-align"
AC_MSG_NOTICE([64bit ARMv8, setting -mstrict-align]);;
esac
AC_MSG_NOTICE([64bit ARMv8 found, setting mcpu to generic+crypto]);; AC_MSG_NOTICE([64bit ARMv8 found, setting mcpu to generic+crypto]);;
*) *)
AM_CPPFLAGS="$AM_CPPFLAGS -mfpu=crypto-neon-fp-armv8" AM_CPPFLAGS="$AM_CPPFLAGS -mfpu=crypto-neon-fp-armv8"