meson: re-add incorrect pkg-config files with GLVND for backward compatibility

This is a bit counter-intuitive, but the issue is that GLVND is broken
in versions <= 1.1.1, so we need to keep wrongly providing these files
to cover up their mistake, otherwise the rest of the world ends up
broken.

Suggested-by: Dylan Baker <[email protected]>
Cc: [email protected]
Signed-off-by: Eric Engestrom <[email protected]>
Reviewed-by: Dylan Baker <[email protected]>

3 files changed, 30 insertions, 13 deletions

diff --git a/src/egl/meson.build b/src/egl/meson.build
index 14aca2a2186..7038a68e955 100644
--- a/src/egl/meson.build
+++ b/src/egl/meson.build
@@ -173,18 +173,25 @@ libegl = shared_library(
   version : egl_lib_version,
 )
 
-if not with_glvnd
-  pkg.generate(
-    name : 'egl',
-    description : 'Mesa EGL Library',
-    version : meson.project_version(),
-    libraries : libegl,
-    libraries_private: gl_priv_libs,
-    requires_private : gl_priv_reqs,
-    extra_cflags : gl_pkgconfig_c_flags,
-  )
+# If using glvnd the pkg-config header should not point to EGL_mesa, it should
+# point to EGL. glvnd is only available on unix like platforms so adding -l
+# should be safe here
+if with_glvnd and glvnd_missing_pc_files
+  _egl = '-L${libdir} -lEGL'
+else
+  _egl = libegl
 endif
 
+pkg.generate(
+  name : 'egl',
+  description : 'Mesa EGL Library',
+  version : meson.project_version(),
+  libraries : _egl,
+  libraries_private: gl_priv_libs,
+  requires_private : gl_priv_reqs,
+  extra_cflags : gl_pkgconfig_c_flags,
+)
+
 if with_tests and prog_nm.found()
   if with_glvnd
     egl_symbols = files('egl-glvnd-symbols.txt')
diff --git a/src/mapi/meson.build b/src/mapi/meson.build
index 2c79a04f1df..39c1dba7ce0 100644
--- a/src/mapi/meson.build
+++ b/src/mapi/meson.build
@@ -35,7 +35,7 @@ if with_shared_glapi
 else
   libglapi = []
 endif
-if not with_glvnd
+if not with_glvnd or glvnd_missing_pc_files
   if with_gles1
     subdir('es1api')
   endif
diff --git a/src/meson.build b/src/meson.build
index 11e0011c057..ddbcd7f3ae4 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -111,12 +111,22 @@ endif
 
 # This must be after at least mesa, glx, and gallium, since libgl will be
 # defined in one of those subdirs depending on the glx provider.
-if with_glx != 'disabled' and not with_glvnd
+if with_glx != 'disabled'
+  # If using glvnd the pkg-config header should not point to GL_mesa, it should
+  # point to GL. glvnd is only available on unix like platforms so adding -l
+  # should be safe here
+  # TODO: in the glvnd case glvnd itself should really be providing this.
+  if with_glvnd and glvnd_missing_pc_files
+    _gl = '-L${libdir} -lGL'
+  else
+    _gl = libgl
+  endif
+
   pkg.generate(
     name : 'gl',
     description : 'Mesa OpenGL Library',
     version : meson.project_version(),
-    libraries : libgl,
+    libraries : _gl,
     libraries_private : gl_priv_libs,
     requires_private : gl_priv_reqs,
     variables : ['glx_tls=yes'],