[Buildroot] [git commit] package/sdl2: fix sdl2-config.cmake instead of removing it

[Thomas Petazzoni]

commit: https://git.buildroot.net/buildroot/commit/?id=cb46522f3ef1f2efc5785e6151c290af78f837f2
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

SDL2 autotools-provided sdl2-config.cmake uses the absolute /usr prefix.
For this reason, we previously removed it (as of d59261836a).

This commit fixes sdl2-config.cmake to use relative paths instead.

Signed-off-by: Gleb Mazovetskiy <glex.spb at gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
 package/sdl2/sdl2.mk | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/package/sdl2/sdl2.mk b/package/sdl2/sdl2.mk
index a2e426e578..5aad92eda8 100644
--- a/package/sdl2/sdl2.mk
+++ b/package/sdl2/sdl2.mk
@@ -24,13 +24,15 @@ SDL2_CONF_OPTS += \
 
 # We are using autotools build system for sdl2, so the sdl2-config.cmake
 # include path are not resolved like for sdl2-config script.
-# Remove sdl2-config.cmake file and avoid unsafe include path if this
-# file is used by a cmake based package.
+# Change the absolute /usr path to resolve relatively to the sdl2-config.cmake location.
 # https://bugzilla.libsdl.org/show_bug.cgi?id=4597
-define SDL2_REMOVE_SDL2_CONFIG_CMAKE
-	rm -rf $(STAGING_DIR)/usr/lib/cmake/SDL2
+define SDL2_FIX_SDL2_CONFIG_CMAKE
+	$(SED) '2iget_filename_component(PACKAGE_PREFIX_DIR "$${CMAKE_CURRENT_LIST_DIR}/../../../" ABSOLUTE)\n' \
+		$(STAGING_DIR)/usr/lib/cmake/SDL2/sdl2-config.cmake
+	$(SED) 's%"/usr"%$${PACKAGE_PREFIX_DIR}%' \
+		$(STAGING_DIR)/usr/lib/cmake/SDL2/sdl2-config.cmake
 endef
-SDL2_POST_INSTALL_STAGING_HOOKS += SDL2_REMOVE_SDL2_CONFIG_CMAKE
+SDL2_POST_INSTALL_STAGING_HOOKS += SDL2_FIX_SDL2_CONFIG_CMAKE
 
 # We must enable static build to get compilation successful.
 SDL2_CONF_OPTS += --enable-static