Make libglx optional (alpine doesn't have it)

1 files changed, 4 insertions, 6 deletions

diff --git a/src/gl.c b/src/gl.c
index d905eb0..7c9a6bc 100644
--- a/src/gl.c
+++ b/src/gl.c
@@ -116,8 +116,11 @@ static int mgl_gl_load_glx(mgl_gl *self) {
         { NULL, NULL }
     };
 
+    /* In some distros (alpine for example libGLX doesn't exist, but libGL can be used instead) */
+    void *library = self->glx_library ? self->glx_library : self->gl_library;
+
     for(int i = 0; required_dlsym[i].func; ++i) {
-        *required_dlsym[i].func = dlsym_print_fail(self->glx_library, required_dlsym[i].name, 1);
+        *required_dlsym[i].func = dlsym_print_fail(library, required_dlsym[i].name, 1);
         if(!*required_dlsym[i].func)
             return -1;
     }
@@ -169,11 +172,6 @@ int mgl_gl_load(mgl_gl *self) {
     }
 
     self->glx_library = dlopen("libGLX.so.0", RTLD_LAZY);
-    if(!self->glx_library) {
-        fprintf(stderr, "mgl error:dlopen(\"%s\", RTLD_LAZY) failed\n", "libGLX.so.0");
-        mgl_gl_unload(self);
-        return -1;
-    }
 
     self->egl_library = dlopen("libEGL.so.1", RTLD_LAZY);
     if(!self->egl_library) {