Android: use PLATFORM 16 by default, don't bother with compat for API 21

dist-build/android-armv8-a.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 export TARGET_ARCH=armv8-a
 export CFLAGS="-Os -march=${TARGET_ARCH}"
-NDK_PLATFORM_COMPAT=android-21 ARCH=arm64 HOST_COMPILER=aarch64-linux-android "$(dirname "$0")/android-build.sh"
+NDK_PLATFORM=android-21 ARCH=arm64 HOST_COMPILER=aarch64-linux-android "$(dirname "$0")/android-build.sh"

dist-build/android-build.sh

@@ -1,11 +1,9 @@
 #! /bin/sh
 
 if [ -z "$NDK_PLATFORM" ]; then
-  export NDK_PLATFORM="android-24"
-  export NDK_PLATFORM_COMPAT="${NDK_PLATFORM_COMPAT:-android-16}"
-else
-  export NDK_PLATFORM_COMPAT="${NDK_PLATFORM_COMPAT:-${NDK_PLATFORM}}"
+  export NDK_PLATFORM="android-16"
 fi
+export NDK_PLATFORM_COMPAT="${NDK_PLATFORM_COMPAT:-${NDK_PLATFORM}}"
 export NDK_API_VERSION=$(echo "$NDK_PLATFORM" | sed 's/^android-//')
 export NDK_API_VERSION_COMPAT=$(echo "$NDK_PLATFORM_COMPAT" | sed 's/^android-//')
 
@@ -36,7 +34,11 @@ export CC=${CC:-"${HOST_COMPILER}-clang"}
 rm -rf "${TOOLCHAIN_DIR}" "${PREFIX}"
 
 echo
-echo "Building for platform [${NDK_PLATFORM}], retaining compatibility with platform [${NDK_PLATFORM_COMPAT}]"
+if [ "$NDK_PLATFORM" != "$NDK_PLATFORM_COMPAT" ]; then
+  echo "Building for platform [${NDK_PLATFORM}], retaining compatibility with platform [${NDK_PLATFORM_COMPAT}]"
+else
+  echo "Building for platform [${NDK_PLATFORM}]"
+fi
 echo
 
 env - PATH="$PATH" \

dist-build/android-mips64.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 export TARGET_ARCH=mips64r6
 export CFLAGS="-Os -march=${TARGET_ARCH}"
-CC="mips64el-linux-android-gcc" NDK_PLATFORM_COMPAT=android-21 ARCH=mips64 HOST_COMPILER=mips64el-linux-android "$(dirname "$0")/android-build.sh"
+CC="mips64el-linux-android-gcc" NDK_PLATFORM=android-21 ARCH=mips64 HOST_COMPILER=mips64el-linux-android "$(dirname "$0")/android-build.sh"

dist-build/android-x86_64.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 export TARGET_ARCH=westmere
 export CFLAGS="-Os -march=${TARGET_ARCH}"
-NDK_PLATFORM_COMPAT=android-21 ARCH=x86_64 HOST_COMPILER=x86_64-linux-android "$(dirname "$0")/android-build.sh"
+NDK_PLATFORM=android-21 ARCH=x86_64 HOST_COMPILER=x86_64-linux-android "$(dirname "$0")/android-build.sh"