[sdl_image] Fix static sdl_image with shared sdl

recipes/sdl_image/all/conandata.yml

@@ -5,3 +5,8 @@ sources:
  "2.0.5":
  url: "https://www.libsdl.org/projects/SDL_image/release/SDL2_image-2.0.5.tar.gz"
  sha256: "bdd5f6e026682f7d7e1be0b6051b209da2f402a2dd8bd1c4bd9c25ad263108d0"
+patches:
+ "2.6.3":
+ - patch_file: "patches/0001-set-sdl-version-directly.patch"
+ patch_type: "conan"
+ patch_description: "Set SDL version directly in CMake rather than parsing a header"

recipes/sdl_image/all/conanfile.py

@@ -2,7 +2,7 @@
 from conan.errors import ConanInvalidConfiguration
 from conan.tools.apple import is_apple_os
 from conan.tools.cmake import CMake, CMakeDeps, CMakeToolchain, cmake_layout
-from conan.tools.files import copy, get, rmdir
+from conan.tools.files import apply_conandata_patches, copy, export_conandata_patches, get, rmdir
 from conan.tools.scm import Version
 import os
 
@@ -67,6 +67,7 @@ class SDLImageConan(ConanFile):
  }
 
  def export_sources(self):
+ export_conandata_patches(self)
  if Version(self.version) < "2.6":
  copy(self, "CMakeLists.txt", src=self.recipe_folder, dst=self.export_sources_folder)
 
@@ -165,11 +166,14 @@ def generate(self):
  tc.variables["SDL2IMAGE_XV"] = self.options.xv
  tc.variables["SDL2IMAGE_BACKEND_WIC"] = self.options.get_safe("wic")
  tc.variables["SDL2IMAGE_BACKEND_IMAGEIO"] = self.options.get_safe("imageio")
+ if not is_apple_os(self):
+ tc.variables["CMAKE_SHARED_LINKER_FLAGS_INIT"] = '-Wl,--as-needed'
  tc.generate()
  cd = CMakeDeps(self)
  cd.generate()
 
  def build(self):
+ apply_conandata_patches(self)
  rmdir(self, os.path.join(self.source_folder, "external"))
  cmake = CMake(self)
  if Version(self.version) < "2.6":

recipes/sdl_image/all/patches/0001-set-sdl-version-directly.patch

@@ -0,0 +1,21 @@
+diff --git a/cmake/FindPrivateSDL2.cmake b/cmake/FindPrivateSDL2.cmake
+index 0314170..185f352 100644
+--- a/cmake/FindPrivateSDL2.cmake
++++ b/cmake/FindPrivateSDL2.cmake
+@@ -17,7 +17,7 @@ find_path(SDL2_INCLUDE_DIR
+ )
+
+ set(SDL2_VERSION)
+-if(SDL2_INCLUDE_DIR)
++if(FALSE)
+ file(READ "${SDL2_INCLUDE_DIR}/SDL_version.h" _sdl_version_h)
+ string(REGEX MATCH "#define[ \t]+SDL_MAJOR_VERSION[ \t]+([0-9]+)" _sdl2_major_re "${_sdl_version_h}")
+ set(_sdl2_major "${CMAKE_MATCH_1}")
+@@ -29,6 +29,7 @@ if(SDL2_INCLUDE_DIR)
+ set(SDL2_VERSION "${_sdl2_major}.${_sdl2_minor}.${_sdl2_patch}")
+ endif()
+ endif()
++set(SDL2_VERSION ${SDL2_VERSION_STRING})
+
+ find_package_handle_standard_args(PrivateSDL2
+ REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR