diff -u -r --new-file libcaca-0.99.beta20.orig/caca/caca_internals.h libcaca-0.99.beta20/caca/caca_internals.h
--- libcaca-0.99.beta20.orig/caca/caca_internals.h	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/caca/caca_internals.h	2021-12-07 03:03:53.000000000 -0600
@@ -26,6 +26,13 @@
 #   define MAX_DIRTY_COUNT 8
 #endif
 
+#undef __extern
+#if defined CACA_ENABLE_VISIBILITY
+#   define __extern extern __attribute__((visibility("default")))
+#else
+#   define __extern extern
+#endif
+
 struct caca_frame
 {
     /* Frame size */
@@ -116,7 +123,7 @@
 int conio_install(caca_display_t *);
 #endif
 #if defined(USE_GL)
-int gl_install(caca_display_t *);
+__extern int gl_install(caca_display_t *);
 #endif
 #if defined(USE_NCURSES)
 int ncurses_install(caca_display_t *);
@@ -133,7 +140,7 @@
 int win32_install(caca_display_t *);
 #endif
 #if defined(USE_X11)
-int x11_install(caca_display_t *);
+__extern int x11_install(caca_display_t *);
 #endif
 
 /* Timer structure */
@@ -252,8 +259,9 @@
 /* Internal event functions */
 extern void _caca_handle_resize(caca_display_t *);
 #if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO) || defined(USE_GL)
-extern void _push_event(caca_display_t *, caca_privevent_t *);
-extern int _pop_event(caca_display_t *, caca_privevent_t *);
+/* Expose this with ‘__extern’ because the GL driver uses it */
+__extern void _caca_push_event(caca_display_t *, caca_privevent_t *);
+extern int _caca_pop_event(caca_display_t *, caca_privevent_t *);
 #endif
 
 /* Internal window functions */
@@ -269,4 +277,6 @@
 extern void _caca_fini_stat(struct caca_stat *);
 #endif
 
+#undef __extern
+
 #endif /* __CACA_INTERNALS_H__ */
diff -u -r --new-file libcaca-0.99.beta20.orig/caca/driver/conio.c libcaca-0.99.beta20/caca/driver/conio.c
--- libcaca-0.99.beta20.orig/caca/driver/conio.c	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/caca/driver/conio.c	2021-12-07 03:03:53.000000000 -0600
@@ -151,7 +151,7 @@
 
     release = *ev;
     release.type = CACA_EVENT_KEY_RELEASE;
-    _push_event(dp, &release);
+    _caca_push_event(dp, &release);
 
     return 1;
 }
diff -u -r --new-file libcaca-0.99.beta20.orig/caca/driver/gl.c libcaca-0.99.beta20/caca/driver/gl.c
--- libcaca-0.99.beta20.orig/caca/driver/gl.c	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/caca/driver/gl.c	2021-12-07 03:03:53.000000000 -0600
@@ -374,7 +374,7 @@
 
         if(dp->drv.p->mouse_clicked)
         {
-            _push_event(dp, ev);
+            _caca_push_event(dp, ev);
             ev->type = CACA_EVENT_MOUSE_PRESS;
             ev->data.mouse.button = dp->drv.p->mouse_button;
             dp->drv.p->mouse_clicked = 0;
diff -u -r --new-file libcaca-0.99.beta20.orig/caca/driver/ncurses.c libcaca-0.99.beta20/caca/driver/ncurses.c
--- libcaca-0.99.beta20.orig/caca/driver/ncurses.c	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/caca/driver/ncurses.c	2021-12-07 03:03:53.000000000 -0600
@@ -482,9 +482,9 @@
         switch(mevent.bstate)
         {
 #define PRESS(x) ev->data.mouse.button = x; \
-                 ev->type = CACA_EVENT_MOUSE_PRESS; _push_event(dp, ev)
+                 ev->type = CACA_EVENT_MOUSE_PRESS; _caca_push_event(dp, ev)
 #define RELEASE(x) ev->data.mouse.button = x; \
-                   ev->type = CACA_EVENT_MOUSE_RELEASE; _push_event(dp, ev)
+                   ev->type = CACA_EVENT_MOUSE_RELEASE; _caca_push_event(dp, ev)
 #define CLICK(x) PRESS(x); RELEASE(x)
             case BUTTON1_PRESSED: PRESS(1); break;
             case BUTTON1_RELEASED: RELEASE(1); break;
@@ -530,7 +530,7 @@
         }
 
         if(dp->mouse.x == mevent.x && dp->mouse.y == mevent.y)
-            return _pop_event(dp, ev);
+            return _caca_pop_event(dp, ev);
 
         dp->mouse.x = mevent.x;
         dp->mouse.y = mevent.y;
diff -u -r --new-file libcaca-0.99.beta20.orig/caca/driver/slang.c libcaca-0.99.beta20/caca/driver/slang.c
--- libcaca-0.99.beta20.orig/caca/driver/slang.c	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/caca/driver/slang.c	2021-12-07 03:03:53.000000000 -0600
@@ -403,12 +403,12 @@
 
         ev->data.mouse.button = button;
         ev->type = CACA_EVENT_MOUSE_PRESS;
-        _push_event(dp, ev);
+        _caca_push_event(dp, ev);
         ev->type = CACA_EVENT_MOUSE_RELEASE;
-        _push_event(dp, ev);
+        _caca_push_event(dp, ev);
 
         if(dp->mouse.x == x && dp->mouse.y == y)
-            return _pop_event(dp, ev);
+            return _caca_pop_event(dp, ev);
 
         dp->mouse.x = x;
         dp->mouse.y = y;
diff -u -r --new-file libcaca-0.99.beta20.orig/caca/event.c libcaca-0.99.beta20/caca/event.c
--- libcaca-0.99.beta20.orig/caca/event.c	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/caca/event.c	2021-12-07 03:03:53.000000000 -0600
@@ -380,7 +380,7 @@
            && dp->events.autorepeat_ticks > AUTOREPEAT_THRESHOLD
            && dp->events.autorepeat_ticks > AUTOREPEAT_RATE)
     {
-        _push_event(dp, ev);
+        _caca_push_event(dp, ev);
         dp->events.autorepeat_ticks -= AUTOREPEAT_RATE;
         *ev = dp->events.last_key_event;
         return 1;
@@ -403,7 +403,7 @@
           && (dp->events.last_key_ticks > AUTOREPEAT_THRESHOLD
                || (ev->type & CACA_EVENT_KEY_PRESS)))
     {
-        _push_event(dp, ev);
+        _caca_push_event(dp, ev);
         *ev = dp->events.last_key_event;
         ev->type = CACA_EVENT_KEY_RELEASE;
         dp->events.last_key_event.type = CACA_EVENT_NONE;
@@ -425,7 +425,7 @@
 static int _lowlevel_event(caca_display_t *dp, caca_privevent_t *ev)
 {
 #if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO)
-    int ret = _pop_event(dp, ev);
+    int ret = _caca_pop_event(dp, ev);
 
     if(ret)
         return ret;
@@ -435,7 +435,7 @@
 }
 
 #if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO) || defined(USE_GL)
-void _push_event(caca_display_t *dp, caca_privevent_t *ev)
+void _caca_push_event(caca_display_t *dp, caca_privevent_t *ev)
 {
     if(!ev->type || dp->events.queue == EVENTBUF_LEN)
         return;
@@ -443,7 +443,7 @@
     dp->events.queue++;
 }
 
-int _pop_event(caca_display_t *dp, caca_privevent_t *ev)
+int _caca_pop_event(caca_display_t *dp, caca_privevent_t *ev)
 {
     int i;
 
diff -u -r --new-file libcaca-0.99.beta20.orig/configure.ac libcaca-0.99.beta20/configure.ac
--- libcaca-0.99.beta20.orig/configure.ac	2021-10-19 08:58:30.000000000 -0500
+++ libcaca-0.99.beta20/configure.ac	2021-12-07 03:03:53.000000000 -0600
@@ -269,7 +269,6 @@
    [ac_cv_my_have_cocoa="yes"])
   CFLAGS="$save_CFLAGS"
   if test "${ac_cv_my_have_cocoa}" = "yes"; then
-    [[[ "$target_os" =~ [0-9]+ ]]] && darwin_ver="${BASH_REMATCH[[0]]}"
     case x${target} in
     xpowerpc*darwin*)
       # 10.3 needed to link with X11
@@ -297,6 +296,7 @@
     esac
     CC="${CC:-gcc-${GCC_VERSION}}"
     CXX="${CXX:-g++-${GCC_VERSION}}"
+    darwin_ver="$(echo "${target_os}" | sed -ne 's/[^0-9]*\([0-9]\+\).*/\1/p')"
     if [[ "$darwin_ver" -lt "13" ]]; then
       MACOSX_SDK_FRAMEWORKS="${MACOSX_SDK_FRAMEWORKS:--F${MACOSX_SDK}/System/Library/Frameworks}"
       CPPFLAGS="${CPPFLAGS} ${ARCH} ${MACOSX_SDK_FRAMEWORKS}"