configure changes for OpenBSD

Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -261,11 +261,16 @@ DEFAULT_INT10="x86emu"
 dnl Override defaults as needed for specific platforms:
 
 case $host_cpu in
+  aarch64*)
+	ARM64_VIDEO=yes
+	GLX_ARCH_DEFINES="-D__GLX_ALIGN64"
+	;;
   alpha*)
 	ALPHA_VIDEO=yes
 	case $host_os in
 	        *freebsd*)	SYS_LIBS=-lio ;;
 		*netbsd*)	AC_DEFINE(USE_ALPHA_PIO, 1, [NetBSD PIO alpha IO]) ;;
+		*openbsd*)	SYS_LIBS=-lalpha ;;
 	esac
 	GLX_ARCH_DEFINES="-D__GLX_ALIGN64 -mieee"
 	;;
@@ -292,6 +297,19 @@ case $host_cpu in
 		*freebsd*)	DEFAULT_INT10=stub ;;
 	esac
 	;;
+  riscv64*)
+	RISCV64_VIDEO=yes
+	BSD_ARCH_SOURCES="riscv64_video.c ioperm_noop.c"
+	GLX_ARCH_DEFINES="-D__GLX_ALIGN64"
+	;;
+  m88k)
+	LUNA88K_VIDEO=yes
+	BSD_ARCH_SOURCES="luna88k_video.c ioperm_noop.c"
+	;;
+  mips*)
+	SGI_VIDEO=yes
+	BSD_ARCH_SOURCES="sgi_video.c ioperm_noop.c"
+	;;
   sparc*)
 	SPARC64_VIDEO=yes
 	BSD_ARCH_SOURCES="sparc64_video.c ioperm_noop.c"
@@ -317,14 +335,25 @@ case $host_cpu in
   s390*)
   	GLX_ARCH_DEFINES="-D__GLX_ALIGN64"
 	;;
+  hppa*)
+	case $host_os in
+		*openbsd*)	HPPA_VIDEO=yes
+	     			;;
+	esac
+	;;
 esac
 AC_SUBST(GLX_ARCH_DEFINES)
 
 dnl BSD *_video.c selection
 AM_CONDITIONAL(ALPHA_VIDEO, [test "x$ALPHA_VIDEO" = xyes])
 AM_CONDITIONAL(ARM_VIDEO, [test "x$ARM_VIDEO" = xyes])
+AM_CONDITIONAL(ARM64_VIDEO, [test "x$ARM64_VIDEO" = xyes])
+AM_CONDITIONAL(HPPA_VIDEO, [test "x$HPPA_VIDEO" = xyes])
 AM_CONDITIONAL(I386_VIDEO, [test "x$I386_VIDEO" = xyes])
+AM_CONDITIONAL(LUNA88K_VIDEO, [test "x$LUNA88K_VIDEO" = xyes])
 AM_CONDITIONAL(PPC_VIDEO, [test "x$PPC_VIDEO" = xyes])
+AM_CONDITIONAL(RISCV64_VIDEO, [test "x$RISCV64_VIDEO" = xyes])
+AM_CONDITIONAL(SGI_VIDEO, [test "x$SGI_VIDEO" = xyes])
 AM_CONDITIONAL(SPARC64_VIDEO, [test "x$SPARC64_VIDEO" = xyes])
 
 DRI=no
@@ -349,8 +378,11 @@ case $host_os in
 	;;
   *openbsd*)
 	AC_DEFINE(CSRG_BASED, 1, [System is BSD-like])
-	AC_DEFINE(PCVT_SUPPORT, 1, [System has PC console])
 	AC_DEFINE(WSCONS_SUPPORT, 1, [System has wscons console])
+	# Disable use of SIGIO by default; it breaks multi-card
+	# configurations.  We don't want to run thousands of lines of
+	# potentially signal-unsafe code for no particular benefit.
+	USE_SIGIO_BY_DEFAULT="no"
 	;;
   *linux*)
 	DRI=yes
@@ -536,6 +568,16 @@ AC_ARG_WITH(khronos-spec-dir, AS_HELP_STRING([--with-k
 				[KHRONOS_SPEC_DIR="${withval}"],
 				[KHRONOS_SPEC_DIR=auto])
 
+dnl Privsep
+AC_ARG_ENABLE(privsep,
+	AC_HELP_STRING([--enable-privsep],
+         [Build support for X server privilege separation (default is NO)]),
+	[ENABLE_PRIVSEP="$enableval"], [ENABLE_PRIVSEP="no"])
+if test x$ENABLE_PRIVSEP = xyes ; then
+	AC_DEFINE(X_PRIVSEP, 1, [Use X server privilege separation])
+fi
+AM_CONDITIONAL(X_PRIVSEP, [test x$ENABLE_PRIVSEP = xyes])
+
 dnl Extensions.
 AC_ARG_ENABLE(composite,      AS_HELP_STRING([--disable-composite], [Build Composite extension (default: enabled)]), [COMPOSITE=$enableval], [COMPOSITE=yes])
 AC_ARG_ENABLE(mitshm,         AS_HELP_STRING([--disable-mitshm], [Build SHM extension (default: auto)]), [MITSHM=$enableval], [MITSHM=auto])
@@ -562,6 +604,7 @@ AC_ARG_ENABLE(xf86bigfont,    AS_HELP_STRING([--enable
 AC_ARG_ENABLE(dpms,           AS_HELP_STRING([--disable-dpms], [Build DPMS extension (default: enabled)]), [DPMSExtension=$enableval], [DPMSExtension=yes])
 AC_ARG_ENABLE(config-udev,    AS_HELP_STRING([--enable-config-udev], [Build udev support (default: auto)]), [CONFIG_UDEV=$enableval], [CONFIG_UDEV=auto])
 AC_ARG_ENABLE(config-udev-kms,    AS_HELP_STRING([--enable-config-udev-kms], [Build udev kms support (default: auto)]), [CONFIG_UDEV_KMS=$enableval], [CONFIG_UDEV_KMS=auto])
+AC_ARG_ENABLE(config-kevent-kms,  AS_HELP_STRING([--enable-config-kevent-kms], [Build kevent kms support (default: auto)]), [CONFIG_KEVENT_KMS=$enableval], [CONFIG_KEVENT_KMS=auto]) 
 AC_ARG_ENABLE(config-hal,     AS_HELP_STRING([--disable-config-hal], [Build HAL support (default: auto)]), [CONFIG_HAL=$enableval], [CONFIG_HAL=auto])
 AC_ARG_ENABLE(config-wscons,  AS_HELP_STRING([--enable-config-wscons], [Build wscons config support (default: auto)]), [CONFIG_WSCONS=$enableval], [CONFIG_WSCONS=auto])
 AC_ARG_ENABLE(xfree86-utils,     AS_HELP_STRING([--enable-xfree86-utils], [Build xfree86 DDX utilities (default: enabled)]), [XF86UTILS=$enableval], [XF86UTILS=yes])
@@ -838,6 +881,10 @@ if test "x$WITH_SYSTEMD_DAEMON" = "xyes" -o "x$WITH_SY
 fi
 AM_CONDITIONAL([HAVE_SYSTEMD_DAEMON], [test "x$HAVE_SYSTEMD_DAEMON" = "xyes"])
 
+if test "x$CONFIG_KEVENT_KMS" != xno; then
+	AC_CHECK_FUNC([kevent], [AC_DEFINE(CONFIG_KEVENT_KMS, 1, [Use kevent for kms enumeration])])
+fi
+
 if test "x$CONFIG_UDEV" = xyes && test "x$CONFIG_HAL" = xyes; then
 	AC_MSG_ERROR([Hotplugging through both libudev and hal not allowed])
 fi
@@ -1259,6 +1306,15 @@ if test "x$PRESENT" = xyes; then
 	PRESENT_LIB='$(top_builddir)/present/libpresent.la'
 fi
 
+# link Xorg with pthreads for llvm-pipe driver on OpenBSD
+if test "x$DRI2" = xyes; then
+	case $host_os in
+	openbsd*)
+        	XORG_SYS_LIBS="-lpthread"
+        	;;
+	esac
+fi
+
 AM_CONDITIONAL(XINERAMA, [test "x$XINERAMA" = xyes])
 if test "x$XINERAMA" = xyes; then
 	AC_DEFINE(XINERAMA, 1, [Support Xinerama extension])
@@ -1654,6 +1710,18 @@ AC_SUBST([UTILS_SYS_LIBS])
 # Some platforms require extra flags to do this.   libtool should set the
 # necessary flags for each platform when -export-dynamic is passed to it.
 LD_EXPORT_SYMBOLS_FLAG="-export-dynamic"
+case $host_os in
+       openbsd*)
+       case $host_cpu in
+       		m88k)
+		LD_EXPORT_SYMBOLS_FLAGS=""
+		;;
+		*)
+		LD_EXPORT_SYMBOLS_FLAG="-Wl,--export-dynamic"
+		;;
+		esac
+       ;;
+esac
 LD_NO_UNDEFINED_FLAG=
 XORG_DRIVER_LIBS=
 case "$host_os" in
@@ -1828,7 +1896,14 @@ if test "x$XORG" = xyes; then
 		esac
 		case $host_cpu in
 		  sparc*)
-			xorg_bus_sparc="yes"
+			case $host_os in
+			  openbsd*)
+			    xorg_bus_sparc="no"
+			    ;;
+			  *)
+			    xorg_bus_sparc="yes"
+			    ;;
+			esac
 			;;
 		esac
 	else