Travis CI: Test Android configuration (#546)

I don't know if this actually works, but it compiles, which is good enough for CI.

16 files changed, 187 insertions, 69 deletions

diff --git a/.travis.yml b/.travis.yml
index 3cfce867..82f73e8d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -29,24 +29,39 @@ matrix:
                   - libegl1-mesa-dev
     - os: osx
       env: ARCH=universal
+    - os: linux
+      env: ARCH=arm64-android
+      sudo: required
 
 before_script:
 
 before_install:
+  - export PLATFORM=Desktop
   - if [ "$TRAVIS_OS_NAME" == "linux" ]; then
-      sudo apt-get install -y gcc-multilib
-                              libasound2-dev:$ARCH
-                              libxcursor-dev:$ARCH libxinerama-dev:$ARCH mesa-common-dev:$ARCH
-                              libx11-dev:$ARCH libxrandr-dev:$ARCH libxrandr2:$ARCH libxi-dev:$ARCH
-                              libgl1-mesa-dev:$ARCH libglu1-mesa-dev:$ARCH;
-      if [ "$ARCH" == "i386" ]; then
-        export CMAKE_ARCH_ARGS='-DCMAKE_C_FLAGS=-m32 -DCMAKE_SYSTEM_LIBRARY_PATH=/usr/lib/i386-linux-gnu';
-      fi;
-      export RAYLIB_PACKAGE_SUFFIX="-Linux-$ARCH";
-      if [ "$GLFW" == "SYSTEM" ]; then
-        wget 'http://ftp.de.debian.org/debian/pool/main/g/glfw3/libglfw3_3.2.1-1_amd64.deb';
-        wget 'http://ftp.de.debian.org/debian/pool/main/g/glfw3/libglfw3-dev_3.2.1-1_amd64.deb';
-        sudo dpkg -i libglfw3_3.2.1-1_amd64.deb libglfw3-dev_3.2.1-1_amd64.deb;
+      if [[ "$ARCH" == *-android ]]; then
+        export RAYLIB_PACKAGE_SUFFIX="-Android-arm64";
+        wget https://dl.google.com/android/repository/android-ndk-r17-linux-x86_64.zip;
+        unzip -qq android-ndk*.zip;
+        android-ndk*/build/tools/make_standalone_toolchain.py --arch arm64 --api 21 --install-dir /tmp/android-toolchain;
+        export PATH=/tmp/android-toolchain/bin:$PATH;
+        export PLATFORM=Android;
+        export CC=aarch64-linux-android-clang;
+        export CXX=aarch64-linux-android-clang++;
+      else
+        sudo apt-get install -y gcc-multilib
+                                libasound2-dev:$ARCH
+                                libxcursor-dev:$ARCH libxinerama-dev:$ARCH mesa-common-dev:$ARCH
+                                libx11-dev:$ARCH libxrandr-dev:$ARCH libxrandr2:$ARCH libxi-dev:$ARCH
+                                libgl1-mesa-dev:$ARCH libglu1-mesa-dev:$ARCH;
+        if [ "$ARCH" == "i386" ]; then
+          export CMAKE_ARCH_ARGS='-DCMAKE_C_FLAGS=-m32 -DCMAKE_SYSTEM_LIBRARY_PATH=/usr/lib/i386-linux-gnu';
+        fi;
+        export RAYLIB_PACKAGE_SUFFIX="-Linux-$ARCH";
+        if [ "$GLFW" == "SYSTEM" ]; then
+          wget 'http://ftp.de.debian.org/debian/pool/main/g/glfw3/libglfw3_3.2.1-1_amd64.deb';
+          wget 'http://ftp.de.debian.org/debian/pool/main/g/glfw3/libglfw3-dev_3.2.1-1_amd64.deb';
+          sudo dpkg -i libglfw3_3.2.1-1_amd64.deb libglfw3-dev_3.2.1-1_amd64.deb;
+        fi;
       fi;
     fi
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then
@@ -66,12 +81,14 @@ script:
       git checkout 1.12 && ./autogen.sh --prefix=/usr && make && sudo make install;
       popd;
     fi
-  - cmake $CMAKE_ARCH_ARGS -DMACOS_FATLIB=ON -DSTATIC=ON -DSHARED=ON -DBUILD_EXAMPLES=ON -DBUILD_GAMES=ON -DUSE_EXTERNAL_GLFW=IF_POSSIBLE -DUSE_WAYLAND=${USE_WAYLAND} ..
+  - cmake $CMAKE_ARCH_ARGS -DMACOS_FATLIB=ON -DSTATIC=ON -DSHARED=ON -DBUILD_EXAMPLES=ON -DBUILD_GAMES=ON -DUSE_EXTERNAL_GLFW=IF_POSSIBLE -DUSE_WAYLAND=${USE_WAYLAND} -DPLATFORM=${PLATFORM} ..
   - make VERBOSE=1
   - if [ "$GLFW" != "SYSTEM" ]; then make package; fi;
   - sudo make install
   - pkg-config --static --libs raylib
-  - nm -g release/libraylib.a | grep glfwGetProcAddress || (echo "libraylib.a doesn't contain GLFW symbols! Aborting..." && false)
+  - if [[ "$ARCH" != *-android ]]; then
+      nm -g release/libraylib.a | grep glfwGetProcAddress || (echo "libraylib.a doesn't contain GLFW symbols! Aborting..." && false);
+    fi
 
 deploy:
   provider: releases
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 38d98c35..34411b46 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,5 @@
 cmake_minimum_required(VERSION 3.0)
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
 # Config options
 option(BUILD_EXAMPLES "Build the examples." ON)
@@ -15,47 +16,25 @@ else()
   set (CMAKE_C_STANDARD 99)
 endif()
 
-include(CheckCCompilerFlag)
-function(add_if_flag_works flag)
-    CHECK_C_COMPILER_FLAG("${flag}" COMPILER_HAS_THOSE_TOGGLES)
-    set(outcome "Failed")
-    if(COMPILER_HAS_THOSE_TOGGLES)
-        foreach(var ${ARGN})
-            set(${var} "${flag} ${${var}}" PARENT_SCOPE)
-        endforeach()
-        set(outcome "works")
-    endif()
-    message(STATUS "Testing if ${flag} can be used -- ${outcome}")
-endfunction()
-
-add_if_flag_works(-Werror=pointer-arith CMAKE_C_FLAGS)
-add_if_flag_works(-Werror=implicit-function-declaration CMAKE_C_FLAGS)
+include(AddIfFlagCompiles)
+add_if_flag_compiles(-Werror=pointer-arith CMAKE_C_FLAGS)
+add_if_flag_compiles(-Werror=implicit-function-declaration CMAKE_C_FLAGS)
 # src/external/jar_xm.h does shady stuff
-add_if_flag_works(-fno-strict-aliasing CMAKE_C_FLAGS)
+add_if_flag_compiles(-fno-strict-aliasing CMAKE_C_FLAGS)
 
-message(STATUS "Testing if file system supports symlinks")
-execute_process(
-  COMMAND ${CMAKE_COMMAND} -E create_symlink CMakeLists.txt "${CMAKE_CURRENT_BINARY_DIR}/TestingIfSymlinkWorks"
-    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-    RESULT_VARIABLE FILESYSTEM_LACKS_SYMLINKS
-)
-If (FILESYSTEM_LACKS_SYMLINKS)
-  message(STATUS "Testing if file system supports symlinks -- unsupported")
-else()
-  message(STATUS "Testing if file system supports symlinks -- supported")
-endif()
+include(CheckFileSystemSymlinkSupport)
 
 if (ENABLE_ASAN)
-    add_if_flag_works(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
-    add_if_flag_works(-fsanitize=address CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_compiles(-fsanitize=address CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
 endif()
 if (ENABLE_UBSAN)
-    add_if_flag_works(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
-    add_if_flag_works(-fsanitize=undefined CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_compiles(-fsanitize=undefined CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
 endif()
 if (ENABLE_MSAN)
-    add_if_flag_works(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
-    add_if_flag_works(-fsanitize=memory CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_compiles(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_compiles(-fsanitize=memory CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
 endif()
 
 if (ENABLE_MSAN AND ENABLE_ASAN)
diff --git a/cmake/AddIfFlagCompiles.cmake b/cmake/AddIfFlagCompiles.cmake
new file mode 100644
index 00000000..403607b5
--- /dev/null
+++ b/cmake/AddIfFlagCompiles.cmake
@@ -0,0 +1,12 @@
+include(CheckCCompilerFlag)
+function(add_if_flag_compiles flag)
+  CHECK_C_COMPILER_FLAG("${flag}" COMPILER_HAS_THOSE_TOGGLES)
+  set(outcome "Failed")
+  if(COMPILER_HAS_THOSE_TOGGLES)
+    foreach(var ${ARGN})
+      set(${var} "${flag} ${${var}}" PARENT_SCOPE)
+    endforeach()
+    set(outcome "compiles")
+  endif()
+  message(STATUS "Testing if ${flag} can be used -- ${outcome}")
+endfunction()
diff --git a/cmake/BuildType.cmake b/cmake/BuildType.cmake
new file mode 100644
index 00000000..80ccdee2
--- /dev/null
+++ b/cmake/BuildType.cmake
@@ -0,0 +1,43 @@
+# Set a default build type if none was specified
+set(default_build_type "Release")
+if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    set(default_build_type "Debug")
+endif()
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
+    set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
+        STRING "Choose the type of build." FORCE)
+    # Set the possible values of build type for cmake-gui
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
+        "MinSizeRel" "RelWithDebInfo")
+endif()
+
+# Taken from the https://github.com/OpenChemistry/tomviz project
+# Copyright (c) 2014-2017, Kitware, Inc.
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 
+# 1. Redistributions of source code must retain the above copyright notice, this
+# list of conditions and the following disclaimer.
+# 
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+# 
+# 3. Neither the name of the copyright holder nor the names of its contributors
+# may be used to endorse or promote products derived from this software
+# without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/cmake/CheckFileSystemSymlinkSupport.cmake b/cmake/CheckFileSystemSymlinkSupport.cmake
new file mode 100644
index 00000000..798840ef
--- /dev/null
+++ b/cmake/CheckFileSystemSymlinkSupport.cmake
@@ -0,0 +1,13 @@
+# Populates a ${FILESYSTEM_LACKS_SYMLINKS} variable
+message(STATUS "Testing if file system supports symlinks")
+execute_process(
+  COMMAND ${CMAKE_COMMAND} -E create_symlink CMakeLists.txt "${CMAKE_CURRENT_BINARY_DIR}/TestingIfSymlinkWorks"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    RESULT_VARIABLE FILESYSTEM_LACKS_SYMLINKS
+)
+If (FILESYSTEM_LACKS_SYMLINKS)
+  message(STATUS "Testing if file system supports symlinks -- unsupported")
+else()
+  message(STATUS "Testing if file system supports symlinks -- supported")
+endif()
+
diff --git a/utils.cmake b/cmake/utils.cmake
index 27f74e68..a3e60fb5 100755
--- a/utils.cmake
+++ b/cmake/utils.cmake
@@ -16,6 +16,9 @@ if(APPLE)
                    ${IOKIT_LIBRARY} ${COREFOUNDATION_LIBRARY} ${COREVIDEO_LIBRARY})
 elseif(WIN32)
   # no pkg-config --static on Windows yet...
+elseif(${PLATFORM} MATCHES "Android")
+  find_library(OPENGL_LIBRARY OpenGL)
+  set(LIBS_PRIVATE m log android EGL GLESv2 OpenSLES atomic c)
 else()
   find_library(pthread NAMES pthread)
   find_package(OpenGL QUIET)
@@ -38,13 +41,15 @@ else()
   endif()
 endif()
 
-if(USE_EXTERNAL_GLFW STREQUAL "ON")
+if(${PLATFORM} MATCHES "Desktop")
+  if(USE_EXTERNAL_GLFW STREQUAL "ON")
     find_package(glfw3 3.2.1 REQUIRED)
-elseif(USE_EXTERNAL_GLFW STREQUAL "IF_POSSIBLE")
+  elseif(USE_EXTERNAL_GLFW STREQUAL "IF_POSSIBLE")
     find_package(glfw3 3.2.1 QUIET)
-endif()
-if (glfw3_FOUND)
-  set(LIBS_PRIVATE ${LIBS_PRIVATE} glfw)
+  endif()
+  if (glfw3_FOUND)
+    set(LIBS_PRIVATE ${LIBS_PRIVATE} glfw)
+  endif()
 endif()
 
 if(CMAKE_SYSTEM_NAME STREQUAL Linux)
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 1f05d529..fd65a74b 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(examples)
 
-include("../utils.cmake")
+include("../cmake/utils.cmake")
 
 # Make sure raylib has been built
 # TODO `build` directory should maybe be something else...
@@ -40,6 +40,29 @@ if(NOT HAVE_OCULUS_CAPI)
 endif()
 list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/standard_lighting.c)
 
+if(${PLATFORM} MATCHES "Android")
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/others/rlgl_standalone.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_3d_picking.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_vr_simulator.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_3d_camera_free.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_3d_camera_first_person.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/core/core_world_screen.c)
+
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_mesh_picking.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_material_pbr.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_cubicmap.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_skybox.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_mesh_picking.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_mesh_generation.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_heightmap.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_billboard.c)
+
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_custom_uniform.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_model_shader.c)
+  list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_postprocessing.c)
+  
+endif()
+
 
 # Do each example
 foreach(example_source ${example_sources})
diff --git a/games/CMakeLists.txt b/games/CMakeLists.txt
index 278d1330..35c99139 100644
--- a/games/CMakeLists.txt
+++ b/games/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(games)
 
-include("../utils.cmake")
+include("../cmake/utils.cmake")
 
 # Make sure raylib has been built
 # TODO `build` directory should maybe be something else...
diff --git a/games/drturtle/CMakeLists.txt b/games/drturtle/CMakeLists.txt
index 59813fb3..bdd91970 100644
--- a/games/drturtle/CMakeLists.txt
+++ b/games/drturtle/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(drturtle)
 
-include("../../utils.cmake")
+include("../../cmake/utils.cmake")
 
 
 # Make sure raylib has been built
diff --git a/games/just_do/CMakeLists.txt b/games/just_do/CMakeLists.txt
index 11644008..4c5e1ee4 100644
--- a/games/just_do/CMakeLists.txt
+++ b/games/just_do/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(just_do)
 
-include("../../utils.cmake")
+include("../../cmake/utils.cmake")
 
 
 # Make sure raylib has been built
diff --git a/games/koala_seasons/CMakeLists.txt b/games/koala_seasons/CMakeLists.txt
index 16069a7e..f79ab911 100644
--- a/games/koala_seasons/CMakeLists.txt
+++ b/games/koala_seasons/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(koala_seasons)
 
-include("../../utils.cmake")
+include("../../cmake/utils.cmake")
 
 
 # Make sure raylib has been built
diff --git a/games/light_my_ritual/CMakeLists.txt b/games/light_my_ritual/CMakeLists.txt
index 1e2cafe1..11d2e4f4 100644
--- a/games/light_my_ritual/CMakeLists.txt
+++ b/games/light_my_ritual/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(light_my_ritual)
 
-include("../../utils.cmake")
+include("../../cmake/utils.cmake")
 
 
 # Make sure raylib has been built
diff --git a/games/skully_escape/CMakeLists.txt b/games/skully_escape/CMakeLists.txt
index d14f52d9..337e1db5 100644
--- a/games/skully_escape/CMakeLists.txt
+++ b/games/skully_escape/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(skully_escape)
 
-include("../../utils.cmake")
+include("../../cmake/utils.cmake")
 
 
 # Make sure raylib has been built
diff --git a/games/wave_collector/CMakeLists.txt b/games/wave_collector/CMakeLists.txt
index c16bd426..ca6c37b8 100644
--- a/games/wave_collector/CMakeLists.txt
+++ b/games/wave_collector/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Setup the project and settings
 project(wave_collector)
 
-include("../../utils.cmake")
+include("../../cmake/utils.cmake")
 
 
 # Make sure raylib has been built
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 458b9606..41b417a0 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,14 +1,17 @@
 # Setup the project and settings
 project(raylib)
 include(GNUInstallDirs)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/../cmake")
 
 set(PROJECT_VERSION 2.0.0)
 set(API_VERSION 2)
 set(RAYLIB raylib)    # Name of the generated library
 
 include("CMakeOptions.txt")
+include(BuildType)
 configure_file(config.h.in ${CMAKE_BINARY_DIR}/cmake/config.h)
 include_directories(${CMAKE_BINARY_DIR})
+include_directories(SYSTEM .)
 
 if(MACOS_FATLIB)
     if (CMAKE_OSX_ARCHITECTURES)
@@ -22,7 +25,7 @@ endif()
 file(GLOB raylib_sources *.c)
 list(REMOVE_ITEM raylib_sources ${CMAKE_CURRENT_SOURCE_DIR}/rglfw.c)
 
-if(NOT glfw3_FOUND)
+if(NOT glfw3_FOUND AND "${PLATFORM}" MATCHES "Desktop")
   set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
   set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
   set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
@@ -39,7 +42,7 @@ if(NOT glfw3_FOUND)
   list(APPEND raylib_sources $<TARGET_OBJECTS:glfw_objlib>)
 endif()
 
-include("../utils.cmake")
+include(utils)
 
 if(USE_AUDIO)
   file(GLOB stb_vorbis external/stb_vorbis.c)
@@ -51,6 +54,8 @@ else()
   set(sources ${raylib_sources})
 endif()
 
+include(AddIfFlagCompiles)
+
 ### Config options ###
 # Translate the config options to what raylib wants
 if(${PLATFORM} MATCHES "Desktop")
@@ -90,14 +95,27 @@ elseif(${PLATFORM} MATCHES "Web")
 elseif(${PLATFORM} MATCHES "Android")
   set(PLATFORM "PLATFORM_ANDROID")
   set(GRAPHICS "GRAPHICS_API_OPENGL_ES2")
+  add_if_flag_compiles(-ffunction-sections CMAKE_C_FLAGS)
+  add_if_flag_compiles(-funwind-tables CMAKE_C_FLAGS)
+  add_if_flag_compiles(-fstack-protector-strong CMAKE_C_FLAGS)
+  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+  add_if_flag_compiles(-Wa,--noexecstack CMAKE_C_FLAGS)
+  add_if_flag_compiles(-no-canonical-prefixes CMAKE_C_FLAGS)
+  add_definitions(-DANDROID -D__ANDROID_API__=21)
+  include_directories(external/android/native_app_glue )
+  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--exclude-libs,libatomic.a -Wl,--build-id -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -Wl,--warn-shared-textrel -Wl,--fatal-warnings -uANativeActivity_onCreate")
+
 elseif(${PLATFORM} MATCHES "Raspberry Pi")
   set(PLATFORM "PLATFORM_RPI")
   set(GRAPHICS "GRAPHICS_API_OPENGL_ES2")
 endif()
 
 # Which platform?
-if(${PLATFORM} MATCHES "PLATFORM_DESKTOP")
+if(${PLATFORM} MATCHES "PLATFORM_WEB")
+  # For the web.
+  add_executable(${RAYLIB} ${sources})
 
+else()
   if(${SHARED})
     add_library(${RAYLIB}_shared SHARED ${sources})
 
@@ -111,7 +129,10 @@ if(${PLATFORM} MATCHES "PLATFORM_DESKTOP")
     set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
     set(CMAKE_MACOSX_RPATH ON)
 
-    target_link_libraries(${RAYLIB}_shared ${LIBS_PRIVATE} glfw ${GLFW_LIBRARIES})
+    target_link_libraries(${RAYLIB}_shared ${LIBS_PRIVATE})
+    if (${PLATFORM} MATCHES "Desktop")
+      target_link_libraries(${RAYLIB}_shared glfw ${GLFW_LIBRARIES})
+    endif()
     if (UNIX AND ${FILESYSTEM_LACKS_SYMLINKS})
       MESSAGE(WARNING "Can't version UNIX shared library on file system without symlink support")
     else()
@@ -148,7 +169,9 @@ if(${PLATFORM} MATCHES "PLATFORM_DESKTOP")
     )
 
     set(PKG_CONFIG_LIBS_PRIVATE ${__PKG_CONFIG_LIBS_PRIVATE})
-    target_link_libraries(${RAYLIB} glfw ${GLFW_LIBRARIES})
+    if (${PLATFORM} MATCHES "Desktop")
+      target_link_libraries(${RAYLIB} glfw ${GLFW_LIBRARIES})
+    endif()
 
     if (WITH_PIC)
       set_property(TARGET ${RAYLIB} PROPERTY POSITION_INDEPENDENT_CODE ON)
@@ -169,9 +192,6 @@ if(${PLATFORM} MATCHES "PLATFORM_DESKTOP")
   file(COPY "physac.h" DESTINATION ".")
   file(COPY "raymath.h" DESTINATION ".")
   file(COPY "audio.h" DESTINATION ".")
-elseif(${PLATFORM} MATCHES "PLATFORM_WEB")
-  # For the web.
-  add_executable(${RAYLIB} ${sources})
 endif()
 
 # Print the flags for the user
diff --git a/src/utils.c b/src/utils.c
index 9d9d8b55..cd75e695 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -57,6 +57,12 @@
 #include <stdarg.h>                 // Required for: va_list, va_start(), vfprintf(), va_end()
 #include <string.h>                 // Required for: strlen(), strrchr(), strcmp()
 
+/* This should be in <stdio.h>, but Travis doesn't find it... */
+FILE *funopen(const void *cookie, int (*readfn)(void *, char *, int),
+              int (*writefn)(void *, const char *, int),
+              fpos_t (*seekfn)(void *, fpos_t, int), int (*closefn)(void *));
+
+
 #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_RPI)
     #define STB_IMAGE_WRITE_IMPLEMENTATION
     #include "external/stb_image_write.h"   // Required for: stbi_write_bmp(), stbi_write_png()