@@ -1,28 +1,53 @@
From a4c51ae7897f1ad82d10e593344511b3d7b81dbc Mon Sep 17 00:00:00 2001
From: Jan Vermaete <jan.vermaete@gmail.com>
Date: Wed, 24 Dec 2025 12:58:36 +0100
-Subject: [PATCH 1/1] Add support for legacy OpenGL
+Subject: [PATCH 1/1] Add support for legacy (non-GLVND) OpenGL
+
+Without the glvnd distro feature libglvnd is not built, so libOpenGL.so
+(OPENGL_opengl_LIBRARY) is absent. Make all OpenGL-using code paths work
+against the legacy mesa libGL.so instead:
+
+* Link the legacy OpenGL::GL target rather than the GLVND OpenGL::OpenGL
+ target everywhere (X11, GLES and Wayland).
+
+* X11 / GLES: drop the unsatisfiable GLVND "OpenGL" component from the
+ FIND_PACKAGE() calls; the legacy OpenGL::GL target covers it.
+
+* Wayland: CMake's FindOpenGL couples the EGL component to GLVND -
+ requesting EGL without GLES2/GLES3 forces OPENGL_opengl_LIBRARY to be a
+ required var (FindOpenGL.cmake), so configure fails with:
+
+ Could NOT find OpenGL (missing: OPENGL_opengl_LIBRARY)
+
+ at CMakeLists.txt:435. Find EGL via pkg-config (PkgConfig::EGL) instead,
+ which works regardless of GLVND, and keep the legacy OpenGL::GL target.
Upstream-Status: Pending
Signed-off-by: Rob Woolley <rob.woolley@windriver.com>
Commited-by: Jan Vermaete <jan.vermaete@gmail.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
- CMakeLists.txt | 6 +++---
- 1 file changed, 3 insertions(+), 3 deletions(-)
+ CMakeLists.txt | 19 +++++++------
+ 1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 23741bf..31b3ac8 100644
+index 23741bf..580d1a0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
-@@ -378,13 +378,13 @@ IF(FREEGLUT_GLES)
- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL GLES2 OpenGL)
+@@ -375,16 +375,16 @@ ENDIF()
+ IF(FREEGLUT_GLES)
+ LIST(APPEND PUBLIC_DEFINITIONS -DFREEGLUT_GLES)
+ if(NOT CMAKE_VERSION VERSION_LESS "3.27")
+- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL GLES2 OpenGL)
++ FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL GLES2)
CMAKE_PATH(GET OPENGL_gles2_LIBRARY PARENT_PATH _OPENGL_LIBDIR)
FIND_LIBRARY(GLES1_LIBRARY GLESv1_CM HINTS ${_OPENGL_LIBDIR} REQUIRED)
- LIST(APPEND LIBS ${GLES1_LIBRARY} OpenGL::EGL OpenGL::GLES2 OpenGL::OpenGL)
+ LIST(APPEND LIBS ${GLES1_LIBRARY} OpenGL::EGL OpenGL::GLES2 OpenGL::GL)
elseif(NOT CMAKE_VERSION VERSION_LESS "3.10")
- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL OpenGL)
+- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL OpenGL)
++ FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL)
GET_FILENAME_COMPONENT(_OPENGL_LIBDIR ${OPENGL_egl_LIBRARY} DIRECTORY)
FIND_LIBRARY(GLES1_LIBRARY GLESv1_CM HINTS ${_OPENGL_LIBDIR})
FIND_LIBRARY(GLES2_LIBRARY GLESv2 HINTS ${_OPENGL_LIBDIR})
@@ -31,15 +56,30 @@ index 23741bf..31b3ac8 100644
else()
FIND_PACKAGE(OpenGL REQUIRED)
LIST(GET ${OPENGL_LIBRARIES} 0 _OPENGL_LIB)
-@@ -433,7 +433,7 @@ IF(FREEGLUT_WAYLAND)
+@@ -407,7 +407,7 @@ ELSE()
+ endif()
+
+ if(NOT CMAKE_VERSION VERSION_LESS "3.10")
+- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS OpenGL)
++ FIND_PACKAGE(OpenGL REQUIRED)
+ LIST(APPEND LIBS OpenGL::GL)
+ else()
+ FIND_PACKAGE(OpenGL REQUIRED)
+@@ -432,8 +432,13 @@ IF(FREEGLUT_WAYLAND)
+ ADD_DEFINITIONS(-DFREEGLUT_WAYLAND)
INCLUDE(FindPkgConfig)
if(NOT CMAKE_VERSION VERSION_LESS "3.10")
- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL OpenGL)
+- FIND_PACKAGE(OpenGL REQUIRED COMPONENTS EGL OpenGL)
- LIST(APPEND LIBS OpenGL::EGL OpenGL::OpenGL)
-+ LIST(APPEND LIBS OpenGL::EGL OpenGL::GL)
++ # CMake's FindOpenGL ties the EGL component to GLVND: requesting EGL
++ # without GLES2/GLES3 forces OPENGL_opengl_LIBRARY (libOpenGL.so) to be
++ # required, which is absent without the glvnd distro feature. Find EGL via
++ # pkg-config instead and use the legacy OpenGL::GL (libGL) target.
++ FIND_PACKAGE(OpenGL REQUIRED)
++ PKG_CHECK_MODULES(EGL REQUIRED IMPORTED_TARGET egl)
++ LIST(APPEND LIBS PkgConfig::EGL OpenGL::GL)
else()
FIND_PACKAGE(OpenGL REQUIRED)
LIST(GET ${OPENGL_LIBRARIES} 0 _OPENGL_LIB)
+--
2.47.3
-