Cmake modernization

.gitignore

@@ -0,0 +1,2 @@
+.vscode
+build/*

CMakeLists.txt

@@ -1,10 +1,15 @@
-cmake_minimum_required(VERSION 3.3)
+cmake_minimum_required(VERSION 3.13)
 
 project(lunasvg VERSION 2.3.1 LANGUAGES CXX C)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_C_STANDARD 11)
 
+# Default to hidden visibility for symbols
+set(CMAKE_C_VISIBILITY_PRESET hidden)
+set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
+
 option(BUILD_SHARED_LIBS "Builds as shared library" OFF)
 option(LUNASVG_BUILD_EXAMPLES "Builds examples" OFF)
 
@@ -15,25 +20,61 @@ add_subdirectory(source)
 add_subdirectory(3rdparty/software)
 add_subdirectory(3rdparty/plutovg)
 
-if(BUILD_SHARED_LIBS)
-    target_compile_definitions(lunasvg PUBLIC LUNASVG_SHARED)
-    target_compile_definitions(lunasvg PRIVATE LUNASVG_EXPORT)
+set_target_properties(lunasvg
+    PROPERTIES
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
+)
+
+add_library(lunasvg::lunasvg ALIAS lunasvg)
+
+if(NOT BUILD_SHARED_LIBS)
+    target_compile_definitions(lunasvg PUBLIC LUNASVG_STATIC_DEFINE)
 endif()
 
 if(LUNASVG_BUILD_EXAMPLES)
     add_subdirectory(example)
 endif()
 
-set(LUNASVG_LIBDIR ${CMAKE_INSTALL_PREFIX}/lib)
-set(LUNASVG_INCDIR ${CMAKE_INSTALL_PREFIX}/include)
+#
+# Installation
+#
+include(GNUInstallDirs)
+install(
+    FILES
+    ${CMAKE_CURRENT_SOURCE_DIR}/include/lunasvg.h
+    ${CMAKE_CURRENT_BINARY_DIR}/include/lunasvg_export.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/lunasvg
+)
+install(
+    TARGETS lunasvg
+    EXPORT lunasvg-targets
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
+install(
+    EXPORT lunasvg-targets
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/lunasvg NAMESPACE lunasvg:: FILE lunasvgTargets.cmake
+)
+
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/lunasvgConfig.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/lunasvgConfig.cmake
+    INSTALL_DESTINATION
+    ${CMAKE_INSTALL_LIBDIR}/cmake/lunasvg
+)
+
+write_basic_package_version_file(lunasvgConfigVersion.cmake
+    VERSION ${PROJECT_VERSION}
+    COMPATIBILITY SameMajorVersion
+)
 
 install(FILES
-    include/lunasvg.h
-    DESTINATION ${LUNASVG_INCDIR}
+    ${CMAKE_CURRENT_BINARY_DIR}/lunasvgConfig.cmake
+    ${CMAKE_CURRENT_BINARY_DIR}/lunasvgConfigVersion.cmake
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/lunasvg
 )
 
-install(TARGETS lunasvg
-    LIBRARY     DESTINATION    ${LUNASVG_LIBDIR}
-    ARCHIVE     DESTINATION    ${LUNASVG_LIBDIR}
-    INCLUDES    DESTINATION    ${LUNASVG_INCDIR}
-)
+export(EXPORT lunasvg-targets FILE ${CMAKE_CURRENT_BINARY_DIR}/lunasvgTargets.cmake NAMESPACE lunasvg::)

cmake/lunasvgConfig.cmake.in

@@ -0,0 +1,3 @@
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/lunasvgTargets.cmake")

example/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.3)
+cmake_minimum_required(VERSION 3.13)
 
 set(CMAKE_CXX_STANDARD 14)
 

include/CMakeLists.txt

@@ -1,4 +1,16 @@
+# Generate a standard header with export macros
+include(GenerateExportHeader)
+generate_export_header(lunasvg)
+
 target_include_directories(lunasvg
-PUBLIC
-    "${CMAKE_CURRENT_LIST_DIR}"
+    # When building a project that uses the lunasvg library,
+    # we need to look in the installed include directory
+    PUBLIC
+    $<INSTALL_INTERFACE:include>
+
+    # When building the lunasvg library we need to look in the
+    # build dir for the lunasvg_export.h header and in the source
+    # dir for other headers
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
 )

include/lunasvg.h

@@ -26,15 +26,8 @@
 #include <memory>
 #include <string>
 
-#if defined(_MSC_VER) && defined(LUNASVG_SHARED)
-#ifdef LUNASVG_EXPORT
-#define LUNASVG_API __declspec(dllexport)
-#else
-#define LUNASVG_API __declspec(dllimport)
-#endif
-#else
-#define LUNASVG_API
-#endif
+#include <lunasvg_export.h>
+#define LUNASVG_API LUNASVG_EXPORT
 
 namespace lunasvg {