ports: Add mesa port

ports/mesa/build.sh

@@ -0,0 +1,30 @@
+#!/bin/bash ../install.sh
+
+NAME='mesa'
+VERSION='25.0.7'
+DOWNLOAD_URL="https://archive.mesa3d.org/mesa-$VERSION.tar.xz#592272df3cf01e85e7db300c449df5061092574d099da275d19e97ef0510f8a6"
+DEPENDENCIES=('zlib' 'zstd' 'expat')
+CONFIGURE_OPTIONS=(
+	'-Dprefix=/usr'
+	'-Dosmesa=true'
+	'-Dgallium-drivers=softpipe'
+	'-Dvulkan-drivers=[]'
+	'-Dplatforms=[]'
+	'-Dglx=disabled'
+	'-Dbuildtype=release'
+)
+
+configure() {
+	meson setup --reconfigure --cross-file "$MESON_CROSS_FILE" "${CONFIGURE_OPTIONS[@]}" build || exit 1
+}
+
+build() {
+	meson compile -C build || exit 1
+}
+
+install() {
+	meson install --destdir="$BANAN_SYSROOT" -C build || exit 1
+
+	ln -sf osmesa.pc $BANAN_SYSROOT/usr/lib/pkgconfig/opengl.pc
+	ln -sf libOSMesa.so $BANAN_SYSROOT/usr/lib/libGL.so
+}

ports/mesa/patches/0001-define-static_assert-on-banan_os.patch

@@ -0,0 +1,12 @@
+diff -ruN mesa-25.0.7/src/util/macros.h mesa-25.0.7-banan_os/src/util/macros.h
+--- mesa-25.0.7/src/util/macros.h	2025-05-28 18:20:23.000000000 +0300
++++ mesa-25.0.7-banan_os/src/util/macros.h	2025-06-17 13:59:03.341231717 +0300
+@@ -25,7 +25,7 @@
+ #define UTIL_MACROS_H
+ 
+ #include <assert.h>
+-#if defined(__HAIKU__)  && !defined(__cplusplus)
++#if (defined(__HAIKU__) || defined(__banan_os__)) && !defined(__cplusplus)
+ #define static_assert _Static_assert
+ #endif
+ #include <stddef.h>

ports/mesa/patches/0002-detect-banan_os-as-posix.patch

@@ -0,0 +1,25 @@
+diff -ruN mesa-25.0.7/src/util/detect_os.h mesa-25.0.7-banan_os/src/util/detect_os.h
+--- mesa-25.0.7/src/util/detect_os.h	2025-05-28 18:20:23.000000000 +0300
++++ mesa-25.0.7-banan_os/src/util/detect_os.h	2025-06-17 14:04:20.625567958 +0300
+@@ -76,6 +76,11 @@
+ #define DETECT_OS_WINDOWS 1
+ #endif
+ 
++#if defined(__banan_os__)
++#define DETECT_OS_BANAN_OS 1
++#define DETECT_OS_POSIX 1
++#endif
++
+ #if defined(__HAIKU__)
+ #define DETECT_OS_HAIKU 1
+ #define DETECT_OS_POSIX 1
+@@ -113,6 +118,9 @@
+ #ifndef DETECT_OS_FREEBSD
+ #define DETECT_OS_FREEBSD 0
+ #endif
++#ifndef DETECT_OS_BANAN_OS
++#define DETECT_OS_BANAN_OS 0
++#endif
+ #ifndef DETECT_OS_HAIKU
+ #define DETECT_OS_HAIKU 0
+ #endif

ports/mesa/patches/0003-add-banan_os-memory-detection.patch

@@ -0,0 +1,34 @@
+diff -ruN mesa-25.0.7/src/util/os_misc.c mesa-25.0.7-banan_os/src/util/os_misc.c
+--- mesa-25.0.7/src/util/os_misc.c	2025-05-28 18:20:23.000000000 +0300
++++ mesa-25.0.7-banan_os/src/util/os_misc.c	2025-06-17 14:14:54.254785327 +0300
+@@ -69,6 +69,9 @@
+ #    include <mach/vm_param.h>
+ #    include <mach/vm_statistics.h>
+ #   endif
++#elif DETECT_OS_BANAN_OS
++#  include <fcntl.h>
++#  include <sys/banan-os.h>
+ #elif DETECT_OS_HAIKU
+ #  include <kernel/OS.h>
+ #elif DETECT_OS_WINDOWS
+@@ -311,6 +314,20 @@
+ #endif
+ 
+    return (sysctl(mib, 2, size, &len, NULL, 0) == 0);
++#elif DETECT_OS_BANAN_OS
++    int meminfo_fd = open("/proc/meminfo", O_RDONLY);
++    if (meminfo_fd == -1)
++        return false;
++
++    struct full_meminfo_t meminfo;
++    ssize_t nread = read(meminfo_fd, &meminfo, sizeof(meminfo));
++    close(meminfo_fd);
++
++    if (nread != sizeof(meminfo))
++        return false;
++
++    *size = (meminfo.free_pages + meminfo.used_pages) * meminfo.page_size;
++    return true;
+ #elif DETECT_OS_HAIKU
+    system_info info;
+    status_t ret;

ports/mesa/patches/0004-define-alloca-on-banan_os.patch

@@ -0,0 +1,14 @@
+diff -ruN mesa-25.0.7/include/c99_alloca.h mesa-25.0.7-banan_os/include/c99_alloca.h
+--- mesa-25.0.7/include/c99_alloca.h	2025-05-28 18:20:23.000000000 +0300
++++ mesa-25.0.7-banan_os/include/c99_alloca.h	2025-06-17 14:29:11.535095878 +0300
+@@ -39,6 +39,10 @@
+ 
+ #  include <alloca.h>
+ 
++#elif defined(__banan_os__)
++
++#  define alloca __builtin_alloca
++
+ #else /* !defined(_MSC_VER) */
+ 
+ #  include <stdlib.h>