add CMake build system

Author: drodin

Diff for: CMakeLists.txt

@@ -0,0 +1,60 @@
+cmake_minimum_required(VERSION 3.4)
+
+option(BUILD_OPUSURL "Build opusurl library" ON)
+
+project(opusfile C)
+
+if(MSVC)
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4267 /wd4244 /wd4090")
+endif()
+
+find_path(OGG_INCLUDE_DIR ogg/ogg.h)
+find_library(OGG_LIBRARY ogg)
+
+find_path(OPUS_INCLUDE_DIR opus.h PATH_SUFFIXES opus)
+find_library(OPUS_LIBRARY opus)
+
+add_library(opusfile
+    src/info.c
+    src/internal.c
+    src/opusfile.c
+    src/stream.c)
+
+target_include_directories(opusfile PRIVATE include PUBLIC ${OGG_INCLUDE_DIR} ${OPUS_INCLUDE_DIR})
+target_link_libraries(opusfile PRIVATE ${OGG_LIBRARY} ${OPUS_LIBRARY})
+
+install(TARGETS opusfile
+    RUNTIME DESTINATION bin
+    LIBRARY DESTINATION lib
+    ARCHIVE DESTINATION lib)
+
+if(BUILD_OPUSURL)
+    find_package(OpenSSL MODULE REQUIRED)
+
+    set(opusurl_src
+        src/http.c
+        src/internal.c)
+
+    if(MSVC)
+    list(APPEND opusurl_src
+        src/wincerts.c)
+    endif()
+
+    add_library(opusurl ${opusurl_src})
+
+    target_compile_definitions(opusurl PRIVATE OP_ENABLE_HTTP)
+    target_include_directories(opusurl PRIVATE include)
+    target_link_libraries(opusurl PRIVATE opusfile OpenSSL::SSL)
+
+    if(MSVC)
+    target_link_libraries(opusurl PRIVATE ws2_32.lib crypt32.lib)
+    endif()
+
+    install(TARGETS opusurl
+        RUNTIME DESTINATION bin
+        LIBRARY DESTINATION lib
+        ARCHIVE DESTINATION lib)
+endif()
+
+install(FILES include/opusfile.h
+    DESTINATION include/opus)