Ports: Add port for SDL2_net

Ports/AvailablePorts.md

@@ -123,6 +123,7 @@ Please make sure to keep this list up to date when adding and updating ports. :^
 | [`SDL2_gfx`](SDL2_gfx/)                | SDL2\_gfx (Graphics primitives add-on for SDL2)            | 1.0.4                    | https://sourceforge.net/projects/sdl2gfx/                                      |
 | [`SDL2_image`](SDL2_image/)            | SDL2\_image (Image loading add-on for SDL2)                | 2.0.5                    | https://www.libsdl.org/projects/SDL_image/                                     |
 | [`SDL2_mixer`](SDL2_mixer/)            | SDL2\_mixer (audio mixer add-on for SDL2)                  | 2.0.4                    | https://www.libsdl.org/projects/SDL_mixer/                                     |
+| [`SDL2_net`](SDL2_net/)                | SDL2\_net (network add-on for SDL2)                        | 2.0.1                    | https://www.libsdl.org/projects/SDL_net/                                       |
 | [`SDL2_ttf`](SDL2_ttf/)                | SDL2\_ttf (TrueType Font add-on for SDL2)                  | 2.0.15                   | https://www.libsdl.org/projects/SDL_ttf/                                       |
 | [`sed`](sed/)                          | GNU sed                                                    | 4.2.1                    | https://www.gnu.org/software/sed/                                              |
 | [`sl`](sl/)                            | Steam Locomotive (SL)                                      |                          | https://github.com/mtoyoda/sl                                                  |

Ports/SDL2_net/package.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port=SDL2_net
+version=2.0.1
+useconfigure=true
+configopts=--with-sdl-prefix="${SERENITY_INSTALL_ROOT}/usr/local"
+files="https://www.libsdl.org/projects/SDL_net/release/SDL2_net-${version}.tar.gz SDL2_net-${version}.tar.gz 15ce8a7e5a23dafe8177c8df6e6c79b6749a03fff1e8196742d3571657609d21"
+auth_type=sha256
+depends="SDL2"
+
+post_install() {
+    run ${CC} -shared -o ${SERENITY_INSTALL_ROOT}/usr/local/lib/libSDL2_net.so -Wl,-soname,libSDL2_net.so -Wl,--whole-archive ${SERENITY_INSTALL_ROOT}/usr/local/lib/libSDL2_net.a -Wl,--no-whole-archive
+}

Ports/SDL2_net/patches/configure.patch

@@ -0,0 +1,12 @@
+diff -Naur SDL2_net-2.0.1/config.sub SDL2_net-2.0.1.serenity/config.sub
+--- SDL2_net-2.0.1/config.sub	2016-01-03 08:57:09.000000000 +0100
++++ SDL2_net-2.0.1.serenity/config.sub	2021-06-16 10:40:58.771380293 +0200
+@@ -1364,7 +1364,7 @@
+ 	# The portable systems comes first.
+ 	# Each alternative MUST END IN A *, to match a version number.
+ 	# -sysv* is not here because it comes later, after sysvr4.
+-	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
++	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* | -serenity* \
+ 	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
+ 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
+ 	      | -sym* | -kopensolaris* \

Ports/SDL2_net/patches/ifconf.patch

@@ -0,0 +1,14 @@
+diff -Naur SDL2_net-2.0.1/SDLnet.c SDL2_net-2.0.1.serenity/SDLnet.c
+--- SDL2_net-2.0.1/SDLnet.c	2016-01-03 08:57:09.000000000 +0100
++++ SDL2_net-2.0.1.serenity/SDLnet.c	2021-06-16 10:48:32.073734588 +0200
+@@ -184,6 +184,10 @@
+     return inet_ntoa(in);
+ }
+ 
++#ifdef __serenity__
++#undef SIOCGIFCONF
++#endif
++
+ int SDLNet_GetLocalAddresses(IPaddress *addresses, int maxcount)
+ {
+     int count = 0;

Ports/SDL2_net/patches/select.patch

@@ -0,0 +1,11 @@
+diff -Naur SDL2_net-2.0.1/SDLnetsys.h SDL2_net-2.0.1.serenity/SDLnetsys.h
+--- SDL2_net-2.0.1/SDLnetsys.h	2021-06-16 10:42:24.609750625 +0200
++++ SDL2_net-2.0.1.serenity/SDLnetsys.h	2016-01-03 08:57:09.000000000 +0100
+@@ -46,6 +46,7 @@
+ #include <iphlpapi.h>
+ #else /* UNIX */
+ #include <sys/types.h>
++#include <sys/select.h>
+ #ifdef __FreeBSD__
+ #include <sys/socket.h>
+ #endif