[PR,d/87818] Add D language support for FreeBSD x86

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 14f0a1abbc8..7a286bbaa50 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -775,6 +775,9 @@  case ${target} in
       default_use_cxa_atexit=yes;;
   esac
   use_gcc_stdint=wrap
+  d_target_objs="${d_target_objs} freebsd-d.o"
+  tmake_file="${tmake_file} t-freebsd"
+  target_has_targetdm=yes
   ;;
 *-*-fuchsia*)
   native_system_header_dir=/include
diff --git a/gcc/config/freebsd-d.c b/gcc/config/freebsd-d.c
new file mode 100644
index 00000000000..cdff544d20c
--- /dev/null
+++ b/gcc/config/freebsd-d.c
@@ -0,0 +1,54 @@ 
+/* FreeBSD support needed only by D front-end.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tm_p.h"
+#include "d/d-target.h"
+#include "d/d-target-def.h"
+
+/* Implement TARGET_D_OS_VERSIONS for FreeBSD targets.  */
+
+static void
+freebsd_d_os_builtins (void)
+{
+  char buf[16];
+  snprintf (buf, sizeof (buf), "FreeBSD_%d", FBSD_MAJOR);
+
+  d_add_builtin_version ("FreeBSD");
+  d_add_builtin_version (xstrdup (buf));
+  d_add_builtin_version ("Posix");
+}
+
+/* Implement TARGET_D_CRITSEC_SIZE for FreeBSD targets.  */
+
+static unsigned
+freebsd_d_critsec_size (void)
+{
+  /* This is the sizeof pthread_mutex_t, an opaque pointer.  */
+  return POINTER_SIZE_UNITS;
+}
+
+#undef TARGET_D_OS_VERSIONS
+#define TARGET_D_OS_VERSIONS freebsd_d_os_builtins
+
+#undef TARGET_D_CRITSEC_SIZE
+#define TARGET_D_CRITSEC_SIZE freebsd_d_critsec_size
+
+struct gcc_targetdm targetdm = TARGETDM_INITIALIZER;
diff --git a/gcc/config/t-freebsd b/gcc/config/t-freebsd
new file mode 100644
index 00000000000..15fcf226d08
--- /dev/null
+++ b/gcc/config/t-freebsd
@@ -0,0 +1,21 @@ 
+# Copyright (C) 2019 Free Software Foundation, Inc.
+#
+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GCC is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+freebsd-d.o: $(srcdir)/config/freebsd-d.c
+       $(COMPILE) $<
+       $(POSTCOMPILE)
diff --git a/libphobos/configure.tgt b/libphobos/configure.tgt
index f9c881a8418..2dc05e2cc51 100644
--- a/libphobos/configure.tgt
+++ b/libphobos/configure.tgt
@@ -38,6 +38,9 @@  case "${target}" in
   s390*-linux*)
 	LIBPHOBOS_SUPPORTED=yes
 	;;
+  x86_64-*-freebsd* | i?86-*-freebsd*)
+	LIBPHOBOS_SUPPORTED=yes
+	;;
   x86_64-*-kfreebsd*-gnu | i?86-*-kfreebsd*-gnu)
 	LIBPHOBOS_SUPPORTED=yes
 	;;