Enable optional static library for standalone build

Fixes #89

.travis.yml

@@ -12,6 +12,8 @@ matrix:
       env: CXXSTD=c++11
     - compiler: clang
       env: CXXSTD=c++1y BUILD_NOOPTLIBS=yes
+    - compiler: clang
+      env: CXXSTD=c++1y BUILD_STATIC=yes
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq cmake libsdl2-dev cppcheck doxygen pulseaudio
@@ -26,6 +28,9 @@ before_install:
     else
         sudo apt-get install -qq libsdl2-image-dev libsdl2-ttf-dev libsdl2-mixer-dev
     fi
+    if [ -n "${BUILD_STATIC}" ]; then
+        export CMAKE_EXTRA_ARGS="${CMAKE_EXTRA_ARGS} -DSDL2PP_STATIC=YES"
+    fi
 
   # evironment for live tests
   - dbus-launch pulseaudio --start

CMakeLists.txt

@@ -208,19 +208,26 @@ ENDIF(SDL2PP_WITH_MIXER)
 INCLUDE(GenerateExportHeader)
 
 IF(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
+	# options
+	OPTION(SDL2PP_WITH_EXAMPLES "Build examples" ON)
+	OPTION(SDL2PP_WITH_TESTS "Build tests" ON)
+	OPTION(SDL2PP_ENABLE_LIVE_TESTS "Enable live tests (require X11 display and audio device)" ON)
+	OPTION(SDL2PP_STATIC "Build static library instead of shared one" OFF)
+
 	# library
-	ADD_LIBRARY(SDL2pp SHARED ${LIBRARY_SOURCES} ${LIBRARY_HEADERS})
+	IF(SDL2PP_STATIC)
+		ADD_LIBRARY(SDL2pp STATIC ${LIBRARY_SOURCES} ${LIBRARY_HEADERS})
+	ELSE(SDL2PP_STATIC)
+		ADD_LIBRARY(SDL2pp SHARED ${LIBRARY_SOURCES} ${LIBRARY_HEADERS})
+		TARGET_LINK_LIBRARIES(SDL2pp ${SDL2_ALL_LIBRARIES})
+		SET_TARGET_PROPERTIES(SDL2pp PROPERTIES VERSION 8.0.0 SOVERSION 8)
+	ENDIF(SDL2PP_SHARED)
+
 	GENERATE_EXPORT_HEADER(SDL2pp EXPORT_FILE_NAME SDL2pp/Export.hh)
-	TARGET_LINK_LIBRARIES(SDL2pp ${SDL2_ALL_LIBRARIES})
-	SET_TARGET_PROPERTIES(SDL2pp PROPERTIES VERSION 8.0.0 SOVERSION 8)
 
 	SET(SDL2PP_LIBRARIES ${SDL2PP_EXTRA_LIBRARIES} SDL2pp ${SDL2_ALL_LIBRARIES})
 
 	# examples and tests
-	OPTION(SDL2PP_WITH_EXAMPLES "Build examples" ON)
-	OPTION(SDL2PP_WITH_TESTS "Build tests" ON)
-	OPTION(SDL2PP_ENABLE_LIVE_TESTS "Enable live tests (require X11 display and audio device)" ON)
-
 	IF(SDL2PP_WITH_EXAMPLES)
 		ADD_SUBDIRECTORY(examples)
 	ENDIF(SDL2PP_WITH_EXAMPLES)

README.md

@@ -160,6 +160,7 @@ Following variables may be supplied to CMake to affect build:
 * ```SDL2PP_CXXSTD``` - override C++ standard (default C++11). With C++1y some additional features are enabled such as usage of [[deprecated]] attribute and using stock experimental/optional from C++ standard library
 * ```SDL2PP_WITH_EXAMPLES``` - enable building example programs (only for standalone build, default ON)
 * ```SDL2PP_WITH_TESTS``` - enable building tests (only for standalone build, default ON)
+* ```SDL2PP_STATIC``` - build static library instead of shared (only for standalone build, default OFF)
 * ```SDL2PP_ENABLE_LIVE_TESTS``` - enable tests which require X11 and/or audio device to run (only for standalone build, default ON)
 
 ## Installation ##