Fix build error when not using preset

Author: Louis Fréneau

CMakePresets.json

@@ -12,7 +12,7 @@
          "generator": "Unix Makefiles",
          "binaryDir": "${sourceDir}/_build/${presetName}",
          "cacheVariables": {
-            "UVG_LOG_LEVEL": "INFO",
+            "UVG_LOG_LEVEL_PRESET": "INFO",
             "BUILD_SHARED_LIBS": true,
             "CMAKE_BUILD_TYPE": "RelWithDebInfo",
             "CMAKE_EXPORT_COMPILE_COMMANDS": true,
@@ -27,7 +27,7 @@
          "name": "Release",
          "inherits": "base-config",
          "cacheVariables": {
-            "UVG_LOG_LEVEL": "INFO",
+            "UVG_LOG_LEVEL_PRESET": "INFO",
             "CMAKE_BUILD_TYPE": "Release",
             "ENABLE_TESTING": true,
             "ENABLE_CI_TESTING": true,
@@ -38,7 +38,7 @@
          "name": "RelWithDebInfo",
          "inherits": "base-config",
          "cacheVariables": {
-            "UVG_LOG_LEVEL": "DEBUG",
+            "UVG_LOG_LEVEL_PRESET": "DEBUG",
             "CMAKE_BUILD_TYPE": "RelWithDebInfo",
             "ENABLE_TESTING": true,
             "ENABLE_CI_TESTING": true
@@ -48,7 +48,7 @@
          "name": "Debug",
          "inherits": "base-config",
          "cacheVariables": {
-            "UVG_LOG_LEVEL": "DEBUG",
+            "UVG_LOG_LEVEL_PRESET": "DEBUG",
             "CMAKE_BUILD_TYPE": "Debug",
             "ENABLE_TESTING": true,
             "ENABLE_CI_TESTING": true

src/lib/CMakeLists.txt

@@ -2,7 +2,9 @@ message(DEBUG "./src/lib/cmake")
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
-add_compile_definitions(UVG_LOG_LEVEL=LogLevel::${UVG_LOG_LEVEL})
+if(UVG_LOG_LEVEL_PRESET)
+  add_compile_definitions(UVG_LOG_LEVEL=LogLevel::${UVG_LOG_LEVEL_PRESET})
+endif()
 
 configure_file(version.cpp.in version.cpp)