cmake: disable documentation installation by default

Author: madebr

.github/workflows/main.yml

@@ -109,6 +109,7 @@ jobs:
           -DSDL3IMAGE_WEBP=ON \
           -DSDL3IMAGE_STRICT=ON \
           -DSDL3IMAGE_WERROR=ON \
+          -DSDL3IMAGE_INSTALL_MAN=ON \
           -DCMAKE_INSTALL_PREFIX=prefix_cmake \
           -DCMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE=$PWD/build \
           -DCMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE=$PWD/build \

CMakeLists.txt

@@ -69,7 +69,7 @@ cmake_dependent_option(BUILD_SHARED_LIBS "Build the library as a shared library"
 
 cmake_dependent_option(SDL3IMAGE_INSTALL "Enable SDL3_image install target" ${SDL3IMAGE_ROOTPROJECT} "${sdl3image_install_enableable}" OFF)
 cmake_dependent_option(SDL3IMAGE_INSTALL_CPACK "Create binary SDL3_image archive using CPack" ${SDL3IMAGE_ROOTPROJECT} "SDL3IMAGE_INSTALL" OFF)
-cmake_dependent_option(SDL3IMAGE_INSTALL_MAN "Install man pages for SDL3_image" ${SDL3IMAGE_ROOTPROJECT} "SDL3IMAGE_INSTALL" OFF)
+cmake_dependent_option(SDL3IMAGE_INSTALL_MAN "Install man pages for SDL3_image" OFF "SDL3IMAGE_INSTALL" OFF)
 cmake_dependent_option(SDL3IMAGE_DEPS_SHARED "Load dependencies dynamically" ON PLATFORM_SUPPORTS_SHARED OFF)
 option(SDL3IMAGE_VENDORED "Use vendored third-party libraries" ${vendored_default})
 option(SDL3IMAGE_WERROR "Treat warnings as errors" OFF)