[depends] add neon and tegra switches

tools/depends/configure.in

@@ -31,6 +31,18 @@ AC_ARG_WITH([cpu],
   [optional. specify target cpu. guessed if not specified])],
   [use_cpu=$withval],use_cpu=auto)
 
+AC_ARG_ENABLE([neon],
+  [AS_HELP_STRING([--enable-neon],
+  [enable neon support (default is no)])],
+  [use_neon=$enableval],
+  [use_neon=no])
+
+AC_ARG_ENABLE([tegra],
+  [AS_HELP_STRING([--enable-tegra],
+  [enable Tegra2 arm (default is no)])],
+  [use_tegra=$enableval],
+  [use_tegra=no])
+
 AC_ARG_WITH([ndk],
   [AS_HELP_STRING([--with-ndk],
   [specify path to ndk (required for android only)])],
@@ -93,15 +105,20 @@ platform_cc=gcc
 platform_cxx=g++
 case $host in
   arm*-*linux-android*)
-    if test "x$use_cpu" = "xauto"; then
+    if test "x$use_cpu" = "xauto" || test "x$use_cpu" = "xarmeabi-v7a"; then
       use_cpu="armeabi-v7a"
+      platform_cflags+=" -march=armv7-a -mtune=cortex-a9 -mfloat-abi=softfp"
+      use_neon="yes"
+    fi
+    if test "$use_neon" = "yes"; then
+      platform_cflags+="-mfpu=neon -mvectorize-with-neon-quad"
+    fi
+    if test "$use_tegra" = "yes"; then
+      platform_cflags+="-Wno-psabi -Wa,-march=armv7a -mtune=cortex-a9 -mfpu=vfpv3-d16 -mthumb-interwork"
     fi
     use_sdk="${use_sdk:-android-14}"
     deps_dir="$use_host-$use_sdk"
     platform_cflags="-DANDROID -Os -fexceptions"
-    if test "x$use_cpu" = "xarmeabi-v7a"; then
-      platform_cflags+=" -march=armv7-a -mtune=cortex-a9 -mfloat-abi=softfp -mfpu=neon"
-    fi
     platform_ldflags="-L$prefix/$deps_dir/lib/$use_sdk"
     platform_cxxflags="$platform_cflags -frtti"
     platform_includes="-I$prefix/$deps_dir/include/$use_sdk"
@@ -134,6 +151,12 @@ case $host in
       if test "x$use_cpu" = "xauto"; then
         use_cpu=$host_cpu
       fi
+      if test "$use_neon" = "yes"; then
+        platform_cflags+="-mfpu=neon -mvectorize-with-neon-quad"
+      fi
+      if test "$use_tegra" = "yes"; then
+        platform_cflags+="-Wno-psabi -Wa,-march=armv7a -mtune=cortex-a9 -mfpu=vfpv3-d16 -mthumb-interwork"
+      fi
       use_toolchain="${use_toolchain:-/usr}"
       platform_cflags="-Os -fPIC -DPIC"
       platform_ldflags="-Wl,-rpath-link=$prefix/$deps_dir/lib"