Add enet.

enet/VITABUILD

@@ -0,0 +1,19 @@
+pkgname=enet
+pkgver=1.3.18
+pkgrel=1
+url="https://github.com/lsalzman/enet"
+source=("https://github.com/lsalzman/${pkgname}/archive/refs/tags/v${pkgver}.tar.gz")
+sha256sums=('28603c895f9ed24a846478180ee72c7376b39b4bb1287b73877e5eae7d96b0dd')
+
+build() {
+  cd $pkgname-$pkgver
+  patch unix.c "${srcdir}/enet.patch"
+  cmake -DCMAKE_TOOLCHAIN_FILE=$VITASDK/share/vita.toolchain.cmake
+  make -j$(nproc)
+}
+
+package () {
+  cd $pkgname-$pkgver
+  cp lib$pkgname.a $pkgdir/$VITASDK/arm-vita-eabi/lib/
+  cp include/$pkgname $pkgdir/$VITASDK/arm-vita-eabi/include/
+}

enet/enet.patch

@@ -0,0 +1,28 @@
+--- unix.c	2024-04-15 05:06:53.000000000 +0200
++++ unix.c	2024-06-09 13:46:43.009847600 +0200
+@@ -6,7 +6,9 @@
+
+ #include <sys/types.h>
+ #include <sys/socket.h>
++#ifndef __vita__
+ #include <sys/ioctl.h>
++#endif
+ #include <sys/time.h>
+ #include <netinet/tcp.h>
+ #include <netdb.h>
+@@ -303,11 +305,15 @@
+     switch (option)
+     {
+         case ENET_SOCKOPT_NONBLOCK:
++#ifdef __vita__
++            result = setsockopt (socket, SOL_SOCKET, SO_NONBLOCK, (char *) & value, sizeof (int));
++#else
+ #ifdef HAS_FCNTL
+             result = fcntl (socket, F_SETFL, (value ? O_NONBLOCK : 0) | (fcntl (socket, F_GETFL) & ~O_NONBLOCK));
+ #else
+             result = ioctl (socket, FIONBIO, & value);
+ #endif
++#endif
+             break;
+
+         case ENET_SOCKOPT_BROADCAST: