fix errors that prevented compilation/running

common/headless_display.cpp

@@ -1,5 +1,6 @@
 #include "headless_display.hpp"
 
+#include <cstring>
 #include <stdexcept>
 
 namespace mbgl {

common/headless_view.cpp

@@ -118,7 +118,7 @@ void HeadlessView::resize(uint16_t width, uint16_t height, float pixelRatio) {
         GLX_PBUFFER_HEIGHT, h,
         None
     };
-    GLXPbuffer pbuffer = glXCreatePbuffer(x_display, fg_configs[0], attributes);
+    glx_pbuffer = glXCreatePbuffer(x_display, fb_configs[0], attributes);
 #endif
 }
 

common/headless_view.hpp

@@ -4,7 +4,7 @@
 #ifdef __APPLE__
 #define MBGL_USE_CGL 1
 #else
-#include "glx.h"
+#include <GL/glx.h>
 #define MBGL_USE_GLX 1
 #endif
 
@@ -55,7 +55,7 @@ private:
     Display *x_display = nullptr;
     GLXFBConfig *fb_configs = nullptr;
     GLXContext gl_context = nullptr;
-    GLXPBuffer glx_pbuffer = 0;
+    GLXPbuffer glx_pbuffer = 0;
 #endif
 };