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-rw-r--r--Build/source/libs/libpng/libpng-src/contrib/pngminus/CMakeLists.txt53
1 files changed, 35 insertions, 18 deletions
diff --git a/Build/source/libs/libpng/libpng-src/contrib/pngminus/CMakeLists.txt b/Build/source/libs/libpng/libpng-src/contrib/pngminus/CMakeLists.txt
index 1f815a58251..d7893648a72 100644
--- a/Build/source/libs/libpng/libpng-src/contrib/pngminus/CMakeLists.txt
+++ b/Build/source/libs/libpng/libpng-src/contrib/pngminus/CMakeLists.txt
@@ -1,24 +1,41 @@
-cmake_minimum_required(VERSION 3.1)
-cmake_policy(VERSION 3.1)
+# Copyright (c) 2018-2024 Cosmin Truta
+#
+# This software is released under the MIT license. For conditions of
+# distribution and use, see the LICENSE file part of this package.
-project(PNGMINUS C)
+cmake_minimum_required(VERSION 3.5)
-option(PNGMINUS_USE_STATIC_LIBRARIES "Use the static library builds" ON)
+project(PNGMINUS C)
-# libpng
-add_subdirectory(../.. libpng)
-include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../..)
-include_directories(${CMAKE_CURRENT_BINARY_DIR}/libpng)
-if(PNGMINUS_USE_STATIC_LIBRARIES)
- set(PNGMINUS_PNG_LIBRARY png_static)
-else()
- set(PNGMINUS_PNG_LIBRARY png)
-endif()
+option(PNGMINUS_USE_SYSTEM_PNG
+ "Use the libpng build found in the system" OFF)
-# png2pnm
add_executable(png2pnm png2pnm.c)
-target_link_libraries(png2pnm ${PNGMINUS_PNG_LIBRARY})
-
-# pnm2png
add_executable(pnm2png pnm2png.c)
-target_link_libraries(pnm2png ${PNGMINUS_PNG_LIBRARY})
+
+if(PNGMINUS_USE_SYSTEM_PNG)
+ # Use the system libpng.
+ find_package(PNG REQUIRED)
+ target_link_libraries(png2pnm PRIVATE PNG::PNG)
+ target_link_libraries(pnm2png PRIVATE PNG::PNG)
+else()
+ # Build and use the internal libpng.
+ # Configure libpng for static linking, to produce single-file executables.
+ set(PNG_STATIC ON
+ CACHE STRING "Build the internal libpng as a static library" FORCE)
+ set(PNG_SHARED OFF
+ CACHE STRING "Build the internal libpng as a shared library" FORCE)
+ set(PNG_FRAMEWORK OFF
+ CACHE STRING "Build the internal libpng as a framework bundle" FORCE)
+ add_subdirectory(../.. libpng)
+ target_include_directories(png2pnm PRIVATE
+ "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../..>"
+ "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/libpng>"
+ )
+ target_include_directories(pnm2png PRIVATE
+ "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../..>"
+ "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/libpng>"
+ )
+ target_link_libraries(png2pnm PRIVATE png_static)
+ target_link_libraries(pnm2png PRIVATE png_static)
+endif()