commit ba8533b6ea6a3e0121da4ab73be1dd18580b4d9b
author Eric Anholt <eric@anholt.net> Mon Jul 31 15:15:14 2017 -0700
committer Eric Anholt <eric@anholt.net> Tue Aug 15 13:23:54 2017 -0700
tree 1fb5f4981a76aaf8320f50ebbe950678e3941c6f
parent b94ddc181bc514bd32c1d4103aa1c7582a7a60ff

configure.ac: Introduce HAVE_ARM_ASM/HAVE_AARCH64_ASM and the -D flags.

I've been trying to get away without these conditionals in vc4's NEON
code, but it meant compiling extra unused code on x86, and build failing
on ARMv6.

v2: Use the _arm/_arm64 flags to simplify detection (suggested by Rob),
    but hide the _arm version under ARCH_ARM_HAVE_NEON to keep from trying
    to build this stuff for armv5te.

Tested-by: Rob Herring <robh@kernel.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

configure.ac

diff --git a/configure.ac b/configure.ac
index 3fe47c7b..e3babd3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -773,6 +773,20 @@
             ;;
         esac
         ;;
+    aarch64)
+        case "$host_os" in
+        linux*)
+            asm_arch=aarch64
+            ;;
+        esac
+        ;;
+    arm)
+        case "$host_os" in
+        linux*)
+            asm_arch=arm
+            ;;
+        esac
+        ;;
     esac
 
     case "$asm_arch" in
@@ -792,6 +806,14 @@
         DEFINES="$DEFINES -DUSE_PPC64LE_ASM"
         AC_MSG_RESULT([yes, ppc64le])
         ;;
+    aarch64)
+        DEFINES="$DEFINES -DUSE_AARCH64_ASM"
+        AC_MSG_RESULT([yes, aarch64])
+        ;;
+    arm)
+        DEFINES="$DEFINES -DUSE_ARM_ASM"
+        AC_MSG_RESULT([yes, arm])
+        ;;
     *)
         AC_MSG_RESULT([no, platform not supported])
         ;;
@@ -2731,6 +2753,8 @@
 AM_CONDITIONAL(HAVE_X86_64_ASM, test "x$asm_arch" = xx86_64)
 AM_CONDITIONAL(HAVE_SPARC_ASM, test "x$asm_arch" = xsparc)
 AM_CONDITIONAL(HAVE_PPC64LE_ASM, test "x$asm_arch" = xppc64le)
+AM_CONDITIONAL(HAVE_AARCH64_ASM, test "x$asm_arch" = xaarch64)
+AM_CONDITIONAL(HAVE_ARM_ASM, test "x$asm_arch" = xarm)
 
 AC_SUBST([NINE_MAJOR], 1)
 AC_SUBST([NINE_MINOR], 0)