Fixed current Android compilation issues

* Updated the Android toolchain file to support NDKs up to the latest release (r12b; based on https://github.com/gongminmin/android-cmake).
* Fixed missing sRGB extension defines - also SFML once again compiles for older target API levels not having the sRGB extensions (fixes #1079, supersedes #1085).
* Changed SFML's default STL runtime to `stlport_shared`, since `c++_shared` is no longer supported.

CMakeLists.txt

@@ -24,7 +24,7 @@ set(ANDROID_NATIVE_API_LEVEL ${ANDROID_API_MIN})
 sfml_set_option(ANDROID_NDK "$ENV{ANDROID_NDK}" PATH "Path to the Android NDK")
 
 # define the STL implementation to be used
-sfml_set_option(ANDROID_STL c++_shared STRING "Choose the STL implementation to be used (experimental)")
+sfml_set_option(ANDROID_STL stlport_shared STRING "Choose the STL implementation to be used (experimental)")
 
 # default the ABI to ARM v7a for hardware floating point
 if(NOT ANDROID_ABI)

cmake/toolchains/android.toolchain.cmake

@@ -154,8 +154,6 @@
 #                          Implies -frtti -fno-exceptions.
 #                          Available for NDK r7b and newer.
 #                          Silently degrades to gnustl_static if not available.
-#        c++_static     -> Use libc++ as a static library.
-#        c++_shared     -> Use libc++ as a shared library.
 #
 #    ANDROID_STL_FORCE_FEATURES=ON - turn rtti and exceptions support based on
 #      chosen runtime. If disabled, then the user is responsible for settings
@@ -600,7 +598,7 @@ if( BUILD_WITH_ANDROID_NDK )
  endif()
  if( NOT __availableToolchains )
   file( GLOB __availableToolchainsLst RELATIVE "${ANDROID_NDK_TOOLCHAINS_PATH}" "${ANDROID_NDK_TOOLCHAINS_PATH}/*" )
-  if( __availableToolchains )
+  if( __availableToolchainsLst )
    list(SORT __availableToolchainsLst) # we need clang to go after gcc
   endif()
   __LIST_FILTER( __availableToolchainsLst "^[.]" )
@@ -835,7 +833,7 @@ set( ANDROID_STL_FORCE_FEATURES ON CACHE BOOL "automatically configure rtti and
 mark_as_advanced( ANDROID_STL ANDROID_STL_FORCE_FEATURES )
 
 if( BUILD_WITH_ANDROID_NDK )
- if( NOT "${ANDROID_STL}" MATCHES "^(none|system|system_re|gabi\\+\\+_static|gabi\\+\\+_shared|stlport_static|stlport_shared|gnustl_static|gnustl_shared|c\\+\\+_static|c\\+\\+_shared)$")
+ if( NOT "${ANDROID_STL}" MATCHES "^(none|system|system_re|gabi\\+\\+_static|gabi\\+\\+_shared|stlport_static|stlport_shared|gnustl_static|gnustl_shared)$")
   message( FATAL_ERROR "ANDROID_STL is set to invalid value \"${ANDROID_STL}\".
 The possible values are:
   none           -> Do not configure the runtime.
@@ -847,8 +845,6 @@ The possible values are:
   stlport_shared -> Use the STLport runtime as a shared library.
   gnustl_static  -> (default) Use the GNU STL as a static library.
   gnustl_shared  -> Use the GNU STL as a shared library.
-  c++_static  -> Use libc++ as a static library.
-  c++_shared  -> Use libc++ as a shared library.
 " )
  endif()
 elseif( BUILD_WITH_STANDALONE_TOOLCHAIN )
@@ -973,6 +969,7 @@ if( NOT EXISTS "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}${TOOL_OS_SUFF
  set( _clang_name "clang" )
 endif()
 
+
 # setup paths and STL for NDK
 if( BUILD_WITH_ANDROID_NDK )
  set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}${ANDROID_NDK_TOOLCHAINS_SUBPATH}" )
@@ -990,7 +987,7 @@ if( BUILD_WITH_ANDROID_NDK )
   set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_NDK}/sources/cxx-stl/system/include" )
  elseif( ANDROID_STL MATCHES "gabi" )
   if( ANDROID_NDK_RELEASE_NUM LESS 7000 ) # before r7
-   message( FATAL_ERROR "gabi++ is not awailable in your NDK. You have to upgrade to NDK r7 or newer to use gabi++.")
+   message( FATAL_ERROR "gabi++ is not available in your NDK. You have to upgrade to NDK r7 or newer to use gabi++.")
   endif()
   set( ANDROID_RTTI             ON )
   set( ANDROID_EXCEPTIONS       OFF )
@@ -1029,27 +1026,6 @@ if( BUILD_WITH_ANDROID_NDK )
   else()
    set( __libstl                "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
   endif()
- elseif( ANDROID_STL MATCHES "c\\+\\+_shared" OR ANDROID_STL MATCHES "c\\+\\+_static" )
-  set( ANDROID_EXCEPTIONS       ON )
-  set( ANDROID_RTTI             ON )
-  set( ANDROID_CXX_ROOT     "${ANDROID_NDK}/sources/cxx-stl/" )
-  set( ANDROID_LLVM_ROOT    "${ANDROID_CXX_ROOT}/llvm-libc++" )
-  if( X86 )
-   set( ANDROID_ABI_INCLUDE_DIRS "${ANDROID_CXX_ROOT}/gabi++/include" )
-  else()
-   set( ANDROID_ABI_INCLUDE_DIRS "${ANDROID_CXX_ROOT}/llvm-libc++abi/include" )
-  endif()
-  set( ANDROID_STL_INCLUDE_DIRS     "${ANDROID_LLVM_ROOT}/libcxx/include"
-                                    "${ANDROID_ABI_INCLUDE_DIRS}" )
-  # android support sfiles
-  include_directories ( SYSTEM ${ANDROID_NDK}/sources/android/support/include )
-  if( ANDROID_STL MATCHES "c\\+\\+_shared" AND EXISTS "${ANDROID_LLVM_ROOT}/libs/${ANDROID_NDK_ABI_NAME}/libc++_shared.so" )
-   set( __libstl "${ANDROID_LLVM_ROOT}/libs/${ANDROID_NDK_ABI_NAME}/libc++_shared.so" )
-  elseif( ANDROID_STL MATCHES "c\\+\\+_static" AND EXISTS "${ANDROID_LLVM_ROOT}/libs/${ANDROID_NDK_ABI_NAME}/libc++_static.a" )
-   set( __libstl "${ANDROID_LLVM_ROOT}/libs/${ANDROID_NDK_ABI_NAME}/libc++_static.a" )
-  else()
-   message( "c++ library doesn't exist" )
-  endif()
  else()
   message( FATAL_ERROR "Unknown runtime: ${ANDROID_STL}" )
  endif()
@@ -1122,7 +1098,12 @@ if( NOT CMAKE_C_COMPILER )
  endif()
  set( CMAKE_ASM_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}"     CACHE PATH "assembler" )
  set( CMAKE_STRIP        "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-strip${TOOL_OS_SUFFIX}"   CACHE PATH "strip" )
+ if( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc-ar${TOOL_OS_SUFFIX}" )
+  # Use gcc-ar if we have it for better LTO support.
+  set( CMAKE_AR           "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc-ar${TOOL_OS_SUFFIX}"      CACHE PATH "archive" )
+ else()
   set( CMAKE_AR           "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ar${TOOL_OS_SUFFIX}"      CACHE PATH "archive" )
+ endif()
  set( CMAKE_LINKER       "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ld${TOOL_OS_SUFFIX}"      CACHE PATH "linker" )
  set( CMAKE_NM           "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-nm${TOOL_OS_SUFFIX}"      CACHE PATH "nm" )
  set( CMAKE_OBJCOPY      "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objcopy${TOOL_OS_SUFFIX}" CACHE PATH "objcopy" )

examples/android/jni/Application.mk

@@ -1,5 +1,5 @@
-NDK_TOOLCHAIN_VERSION := 4.8
+NDK_TOOLCHAIN_VERSION := 4.9
 APP_PLATFORM := android-9
-APP_STL := c++_shared
+APP_STL := stlport_shared
 APP_ABI := armeabi-v7a
 APP_MODULES := sfml-activity sfml-example

include/SFML/OpenGL.hpp

@@ -68,6 +68,9 @@
     #include <GLES/gl.h>
     #include <GLES/glext.h>
     
+    // We're not using OpenGL ES 2+ yet, but we can use the sRGB extension
+    #include <GLES2/gl2ext.h>
+
 #endif
 
 

src/SFML/Graphics/GLExtensions.hpp

@@ -112,8 +112,13 @@
     #define GLEXT_GL_INVALID_FRAMEBUFFER_OPERATION    GL_INVALID_FRAMEBUFFER_OPERATION_OES
 
     // Core since 3.0 - EXT_sRGB
+    #ifdef GL_EXT_sRGB
         #define GLEXT_texture_sRGB                        GL_EXT_sRGB
         #define GLEXT_GL_SRGB8_ALPHA8                     GL_SRGB8_ALPHA8_EXT
+    #else
+        #define GLEXT_texture_sRGB                        false
+        #define GLEXT_GL_SRGB8_ALPHA8                     0
+    #endif
 
 #else