libretro-fuse: fix compilation with gcc10

packages/emulation/libretro-fuse/patches/libretro-fuse-Emscripten-fixes.patch

@@ -0,0 +1,50 @@
+From 6640ae1c834c31a776ad1d22c77ed919e8fe3c07 Mon Sep 17 00:00:00 2001
+From: Vladimir Serbinenko <phcoder@google.com>
+Date: Wed, 6 May 2020 02:02:59 +0200
+Subject: [PATCH] Emscripten fixes
+
+---
+ fuse/ui/widget/widget.c | 2 +-
+ src/libretro.c          | 2 +-
+ zlib/gzguts.h           | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/fuse/ui/widget/widget.c b/fuse/ui/widget/widget.c
+index 542a47f..0437cd5 100644
+--- a/fuse/ui/widget/widget.c
++++ b/fuse/ui/widget/widget.c
+@@ -93,7 +93,7 @@ typedef struct widget_recurse_t {
+ static widget_recurse_t widget_return[10]; /* The stack to recurse on */
+ 
+ /* The settings used whilst playing with an options dialog box */
+-settings_info widget_options_settings;
++extern settings_info widget_options_settings;
+ 
+ static int widget_read_font( const char *filename )
+ {
+diff --git a/src/libretro.c b/src/libretro.c
+index ba595b7..19948c6 100644
+--- a/src/libretro.c
++++ b/src/libretro.c
+@@ -476,7 +476,7 @@ static int get_joystick(unsigned device)
+ #ifdef GIT_VERSION
+ static char version[] = PACKAGE_VERSION " " GIT_VERSION;
+ #else
+-const char *fuse_githash;
++extern const char *fuse_githash;
+ static char version[] = PACKAGE_VERSION " .......";
+ #endif
+ 
+diff --git a/zlib/gzguts.h b/zlib/gzguts.h
+index 6463b71..8e83b1d 100644
+--- a/zlib/gzguts.h
++++ b/zlib/gzguts.h
+@@ -18,7 +18,7 @@
+ #  define ZLIB_INTERNAL
+ #endif
+ 
+-#ifdef _IOS_ARM64
++#if defined(_IOS_ARM64) || defined(EMSCRIPTEN)
+ #include <unistd.h>
+ #endif
+