graphics/libfpx: Patch for gcc >= 10.x.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

graphics/libfpx/export-symbols.patch

@@ -0,0 +1,14 @@
+* At least the Darwin linker doesn't like double symbols during the
+  final linking stage...
+
+--- a/jpeg/jpegconf.h
++++ b/jpeg/jpegconf.h
+@@ -27,6 +27,6 @@
+ #   pragma warning(disable : 4244)
+ #   pragma warning(disable : 4142)
+ #else
+-#   define JPEGEXPORT
+-#   define FPXEXPORT
++#   define JPEGEXPORT extern
++#   define FPXEXPORT extern
+ #endif

graphics/libfpx/libfpx.SlackBuild

@@ -64,6 +64,8 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+patch -p1 < $CWD/export-symbols.patch
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \