Add default flags for arm64/armv8 builds

Allows building simple targets with sane default flags.

For example, using the Android arm64 toolchain from the NDK:
https://developer.android.com/ndk/guides/standalone_toolchain.html
./build/tools/make-standalone-toolchain.sh --arch=arm64 \
  --platform=android-24 --install-dir=/tmp/arm64
CROSS=/tmp/arm64/bin/aarch64-linux-android- \
  ~/libvpx/configure --target=arm64-linux-gcc --disable-multithread

BUG=webm:1143

Change-Id: I06f5a7564f5382cf1a4bad41aef4308566c53adf

diff --git a/build/make/configure.sh b/build/make/configure.sh
index af0efbbaeff0bd47028a8ef989fb0ebc61308faa..29aa3cc1958f53904ccb51b35deb6d8d39211ec5 100644 (file)
--- a/build/make/configure.sh
+++ b/build/make/configure.sh
@@ -945,6 +945,9 @@ EOF
               check_add_cflags -mfpu=neon #-ftree-vectorize
               check_add_asflags -mfpu=neon
             fi
+          elif [ ${tgt_isa} = "arm64" ] || [ ${tgt_isa} = "armv8" ]; then
+            check_add_cflags -march=armv8-a
+            check_add_asflags -march=armv8-a
           else
             check_add_cflags -march=${tgt_isa}
             check_add_asflags -march=${tgt_isa}

diff --git a/configure b/configure
index d078596673080b474b1703afe7a9a20982653269..f82ee046b6773e50479ddcd0998c1e3e7d6738d8 100755 (executable)
--- a/configure
+++ b/configure
@@ -97,11 +97,11 @@ EOF
 
 # all_platforms is a list of all supported target platforms. Maintain
 # alphabetically by architecture, generic-gnu last.
+all_platforms="${all_platforms} arm64-darwin-gcc"
+all_platforms="${all_platforms} arm64-linux-gcc"
 all_platforms="${all_platforms} armv6-linux-rvct"
 all_platforms="${all_platforms} armv6-linux-gcc"
 all_platforms="${all_platforms} armv6-none-rvct"
-all_platforms="${all_platforms} arm64-darwin-gcc"
-all_platforms="${all_platforms} arm64-linux-gcc"
 all_platforms="${all_platforms} armv7-android-gcc"   #neon Cortex-A8
 all_platforms="${all_platforms} armv7-darwin-gcc"    #neon Cortex-A8
 all_platforms="${all_platforms} armv7-linux-rvct"    #neon Cortex-A8
@@ -111,6 +111,7 @@ all_platforms="${all_platforms} armv7-win32-vs11"
 all_platforms="${all_platforms} armv7-win32-vs12"
 all_platforms="${all_platforms} armv7-win32-vs14"
 all_platforms="${all_platforms} armv7s-darwin-gcc"
+all_platforms="${all_platforms} armv8-linux-gcc"
 all_platforms="${all_platforms} mips32-linux-gcc"
 all_platforms="${all_platforms} mips64-linux-gcc"
 all_platforms="${all_platforms} sparc-solaris-gcc"