Add FreeBSD support

Partially based on an earlier porting attempt by Johannes Lundberg from
https://github.com/FreeBSDDesktop/freebsd-ports-graphics
(specifically, the vt switching code)

Author: valpackett

.gitignore

@@ -67,6 +67,7 @@ weston-nested-client
 weston-presentation-shm
 weston-resizor
 weston-scaler
+weston-simple-dmabuf-drm
 weston-simple-dmabuf-intel
 weston-simple-dmabuf-v4l
 weston-simple-egl

Makefile.am

@@ -1609,7 +1609,7 @@ $(if $(findstring unstable,$1),unstable,stable)
 endef
 
 define protoname
-$(shell echo $1 | sed 's/\([a-z\-]\+\)-[a-z]\+-v[0-9]\+/\1/')
+$(shell echo $1 | $(SED) 's/\([a-z\-]\+\)-[a-z]\+-v[0-9]\+/\1/')
 endef
 
 protocol/%-protocol.c : $(WAYLAND_PROTOCOLS_DATADIR)/$$(call protostability,$$*)/$$(call protoname,$$*)/$$*.xml

clients/desktop-shell.c

@@ -41,6 +41,9 @@
 #include <ctype.h>
 #include <time.h>
 #include <assert.h>
+#ifdef __FreeBSD__
+#include <signal.h>
+#endif
 
 #include <wayland-client.h>
 #include "window.h"

clients/terminal.c

@@ -32,7 +32,11 @@
 #include <unistd.h>
 #include <math.h>
 #include <time.h>
+#ifdef __linux__
 #include <pty.h>
+#elif __FreeBSD__
+#include <libutil.h>
+#endif
 #include <ctype.h>
 #include <cairo.h>
 #include <sys/epoll.h>

clients/weston-info.c

@@ -695,9 +695,15 @@ clock_name(clockid_t clk_id)
 	static const char *names[] = {
 		[CLOCK_REALTIME] =		"CLOCK_REALTIME",
 		[CLOCK_MONOTONIC] =		"CLOCK_MONOTONIC",
+#ifdef __linux__
 		[CLOCK_MONOTONIC_RAW] =		"CLOCK_MONOTONIC_RAW",
 		[CLOCK_REALTIME_COARSE] =	"CLOCK_REALTIME_COARSE",
 		[CLOCK_MONOTONIC_COARSE] =	"CLOCK_MONOTONIC_COARSE",
+#elif __FreeBSD__
+		[CLOCK_REALTIME_FAST] =		"CLOCK_REALTIME_FAST",
+		[CLOCK_MONOTONIC_FAST] =	"CLOCK_MONOTONIC_FAST",
+#endif
+
 #ifdef CLOCK_BOOTTIME
 		[CLOCK_BOOTTIME] =		"CLOCK_BOOTTIME",
 #endif

compositor/main.c

@@ -41,7 +41,11 @@
 #include <sys/socket.h>
 #include <libinput.h>
 #include <sys/time.h>
+#ifdef __linux__
 #include <linux/limits.h>
+#else
+#include <sys/param.h>
+#endif
 
 #ifdef HAVE_LIBUNWIND
 #define UNW_LOCAL_ONLY
@@ -681,9 +685,14 @@ clock_name(clockid_t clk_id)
 	static const char *names[] = {
 		[CLOCK_REALTIME] =		"CLOCK_REALTIME",
 		[CLOCK_MONOTONIC] =		"CLOCK_MONOTONIC",
+#ifdef __linux__
 		[CLOCK_MONOTONIC_RAW] =		"CLOCK_MONOTONIC_RAW",
 		[CLOCK_REALTIME_COARSE] =	"CLOCK_REALTIME_COARSE",
 		[CLOCK_MONOTONIC_COARSE] =	"CLOCK_MONOTONIC_COARSE",
+#elif __FreeBSD__
+		[CLOCK_REALTIME_FAST] =		"CLOCK_REALTIME_FAST",
+		[CLOCK_MONOTONIC_FAST] =	"CLOCK_MONOTONIC_FAST",
+#endif
 #ifdef CLOCK_BOOTTIME
 		[CLOCK_BOOTTIME] =		"CLOCK_BOOTTIME",
 #endif

configure.ac

@@ -107,6 +107,27 @@ AC_CHECK_HEADERS([execinfo.h])
 
 AC_CHECK_FUNCS([mkostemp strchrnul initgroups posix_fallocate])
 
+AC_MSG_CHECKING([for program_invocation_short_name])
+AC_TRY_COMPILE([#include <errno.h>],
+	       [const char *pn = program_invocation_short_name;],
+	       AC_DEFINE(HAVE_PROGRAM_INVOCATION_SHORT_NAME, 1, [Define to 1 if program_invocation_short_name exists])
+	       AC_MSG_RESULT(yes),
+	       AC_MSG_RESULT(no))
+
+AC_MSG_CHECKING([for getprogname])
+AC_TRY_COMPILE([#include <stdlib.h>],
+	       [getprogname();],
+	       AC_DEFINE(HAVE_GETPROGNAME, 1, [Define to 1 if getprogname exists])
+	       AC_MSG_RESULT(yes),
+	       AC_MSG_RESULT(no))
+
+AH_BOTTOM([#ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
+#ifdef HAVE_GETPROGNAME
+#include <stdlib.h>
+#define program_invocation_short_name getprogname()
+#endif
+#endif])
+
 # check for libdrm as a build-time dependency only
 # libdrm 2.4.30 introduced drm_fourcc.h.
 PKG_CHECK_MODULES(LIBDRM, [libdrm >= 2.4.30], [], [AC_MSG_ERROR([

libweston/compositor-drm.c

@@ -34,7 +34,9 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <linux/input.h>
+#ifdef __linux__
 #include <linux/vt.h>
+#endif
 #include <assert.h>
 #include <sys/mman.h>
 #include <dlfcn.h>
@@ -3739,11 +3741,26 @@ drm_device_is_kms(struct drm_backend *b, struct udev_device *device)
 static struct udev_device*
 find_primary_gpu(struct drm_backend *b, const char *seat)
 {
+	struct udev_device *device;
+#ifndef __FreeBSD__
+	struct udev_device *drm_device, *pci;
 	struct udev_enumerate *e;
 	struct udev_list_entry *entry;
 	const char *path, *device_seat, *id;
-	struct udev_device *device, *drm_device, *pci;
+#endif
 
+#ifdef __FreeBSD__
+	// libudev-devd doesn't support matching
+	device = udev_device_new_from_syspath(b->udev, "/dev/dri/card0");
+	/* Make sure this device is actually capable of modesetting;
+	 * if this call succeeds, b->drm.{fd,filename} will be set,
+	 * and any old values freed. */
+	if (!drm_device_is_kms(b, device)) {
+		udev_device_unref(device);
+		device = NULL;
+	}
+	return device;
+#else
 	e = udev_enumerate_new(b->udev);
 	udev_enumerate_add_match_subsystem(e, "drm");
 	udev_enumerate_add_match_sysname(e, "card[0-9]*");
@@ -3811,6 +3828,7 @@ find_primary_gpu(struct drm_backend *b, const char *seat)
 
 	udev_enumerate_unref(e);
 	return drm_device;
+#endif
 }
 
 static void

libweston/compositor-x11.c

@@ -37,6 +37,9 @@
 #include <errno.h>
 #include <sys/time.h>
 #include <sys/shm.h>
+#ifdef __FreeBSD__
+#include <sys/stat.h>
+#endif
 #include <linux/input.h>
 
 #include <xcb/xcb.h>

libweston/compositor.c

@@ -5435,10 +5435,18 @@ weston_compositor_set_presentation_clock_software(
 {
 	/* In order of preference */
 	static const clockid_t clocks[] = {
+#ifdef __linux__
 		CLOCK_MONOTONIC_RAW,	/* no jumps, no crawling */
 		CLOCK_MONOTONIC_COARSE,	/* no jumps, may crawl, fast & coarse */
+#elif __FreeBSD__
+		CLOCK_MONOTONIC_FAST,	/* no jumps, may crawl, fast & coarse */
+#endif
 		CLOCK_MONOTONIC,	/* no jumps, may crawl */
+#ifdef __linux__
 		CLOCK_REALTIME_COARSE,	/* may jump and crawl, fast & coarse */
+#elif __FreeBSD__
+		CLOCK_REALTIME_FAST,	/* may jump and crawl, fast & coarse */
+#endif
 		CLOCK_REALTIME		/* may jump and crawl */
 	};
 	unsigned i;