libcaca: remove need for compiler blacklist

See: cacalabs/libcaca#59

graphics/libcaca/Portfile

@@ -2,7 +2,6 @@
 
 PortSystem          1.0
 PortGroup           github 1.0
-PortGroup           compiler_blacklist_versions 1.0
 
 name                libcaca
 categories          graphics
@@ -55,26 +54,13 @@ depends_build       port:pkgconfig
 depends_lib         port:ncurses port:zlib
 
 # temporary patch to fix use of implcitily declared function
-
-patchfiles-append patch-fix-implicit-function.diff
-patch.pre_args -p1
+patchfiles-append   patch-libcaca-common-image.diff
 
 use_autoconf         yes
 # these dependencies are removed by use_autoconf, so add them after
 depends_build-append port:libtool port:autoconf port:automake
 autoconf.cmd         ./bootstrap
 
-# Fix link errors on 10.8 and 10.9:
-#   Undefined symbols for architecture x86_64:
-#     "__caca_alloc2d", referenced from:
-#         _load_image in img2txt-common-image.o
-#   Undefined symbols for architecture x86_64:
-#     "__caca_alloc2d", referenced from:
-#         _load_image in cacaview-common-image.o
-#   ld: symbol(s) not found for architecture x86_64
-compiler.blacklist-append \
-                    {clang < 900}
-
 # require C++11 for CppUnit API
 compiler.cxx_standard   2011
 configure.cxxflags-append -std=gnu++11

graphics/libcaca/files/patch-libcaca-common-image.diff

@@ -0,0 +1,14 @@
+_caca_alloc2d is an internal function and not exported to
+the image viewer. It is basically a glorified call to malloc.
+
+--- src/common-image.c.orig	2021-11-06 10:15:28.000000000 -0400
++++ src/common-image.c	2021-11-06 10:15:59.000000000 -0400
+@@ -161,7 +161,7 @@
+     uint32_t depth = (bpp + 7) / 8;
+
+     /* Allocate the pixel buffer */
+-    im->pixels = _caca_alloc2d(im->w, im->h, depth);
++    im->pixels = malloc(im->w * im->h * depth);
+     if (!im->pixels)
+     {
+         caca_file_close(f);