config.gcc (*-*-*vms*): Set c_target_objs, cxx_target_objs.

2011-11-07  Tristan Gingold  <gingold@adacore.com>

	* config.gcc (*-*-*vms*): Set c_target_objs, cxx_target_objs.
	* config/vms/t-vms: Add vms-c.o rule.
	* config/vms/vms-c.c: New file.
	* config/vms/vms-protos.h (vms_c_register_pragma): New prototype.
	* config/vms/vms.h (REGISTER_TARGET_PRAGMAS): Define.

From-SVN: r181079

6 files changed, 270 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 632528b..3d3708c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,13 @@
 2011-11-07  Tristan Gingold  <gingold@adacore.com>
 
+	* config.gcc (*-*-*vms*): Set c_target_objs, cxx_target_objs.
+	* config/vms/t-vms: Add vms-c.o rule.
+	* config/vms/vms-c.c: New file.
+	* config/vms/vms-protos.h (vms_c_register_pragma): New prototype.
+	* config/vms/vms.h (REGISTER_TARGET_PRAGMAS): Define.
+
+2011-11-07  Tristan Gingold  <gingold@adacore.com>
+
 	* config/alpha/vms.h (TARGET_OBJECT_SUFFIX,
 	TARGET_EXECUTABLE_SUFFIX, TARGET_OS_CPP_BUILTINS,
 	TARGET_ABI_OPEN_VMS, LONG_TYPE_SIZE, ADA_LONG_TYPE_SIZE,
diff --git a/gcc/config.gcc b/gcc/config.gcc
index ce97c89..45ba919 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -717,6 +717,8 @@ case ${target} in
   extra_objs="vms.o"
   target_gtfiles="$target_gtfiles \$(srcdir)/config/vms/vms.c"
   tm_p_file="${tm_p_file} vms/vms-protos.h"
+  c_target_objs="vms-c.o"
+  cxx_target_objs="vms-c.o"
   if test x$gnu_ld != xyes; then
     # Build wrappers for native case.
     extra_programs="ld\$(exeext) ar\$(exeext)"
diff --git a/gcc/config/vms/t-vms b/gcc/config/vms/t-vms
index 2ebcfd7..61f9df5 100644
--- a/gcc/config/vms/t-vms
+++ b/gcc/config/vms/t-vms
@@ -32,3 +32,9 @@ vms-crtlmap.h: $(srcdir)/config/vms/vms-crtlmap.map  \
 vms.o: $(srcdir)/config/vms/vms.c $(TREE_H) $(CONFIG_H) $(SYSTEM_H) \
   coretypes.h $(TM_P_H) vms-crtlmap.h
 	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $<
+
+vms-c.o: $(srcdir)/config/vms/vms-c.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
+  $(TM_H) $(CPPLIB_H) $(TREE_H) c-family/c-pragma.h toplev.h $(GGC_H) \
+  $(TM_P_H)
+	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+          $(PREPROCESSOR_DEFINES) \$<
diff --git a/gcc/config/vms/vms-c.c b/gcc/config/vms/vms-c.c
new file mode 100644
index 0000000..eb4c635
--- /dev/null
+++ b/gcc/config/vms/vms-c.c
@@ -0,0 +1,248 @@
+/* VMS specific, C compiler specific functions.
+   Copyright (C) 2011
+   Free Software Foundation, Inc.
+   Contributed by Tristan Gingold (gingold@adacore.com).
+
+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/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "cpplib.h"
+#include "tree.h"
+#include "c-family/c-pragma.h"
+#include "c-family/c-common.h"
+#include "toplev.h"
+#include "ggc.h"
+#include "tm_p.h"
+#include "incpath.h"
+#include "diagnostic.h"
+
+/* '#pragma __nostandard' is simply ignored.  */
+
+static void
+vms_pragma_nostandard (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  tree x;
+
+  if (pragma_lex (&x) != CPP_EOF)
+    warning (OPT_Wpragmas, "junk at end of #pragma __nostandard");
+}
+
+/* '#pragma __standard' is simply ignored.  */
+
+static void
+vms_pragma_standard (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  tree x;
+
+  if (pragma_lex (&x) != CPP_EOF)
+    warning (OPT_Wpragmas, "junk at end of #pragma __standard");
+}
+
+/* Saved member alignment.  */
+static int saved_member_alignment;
+
+/* Handle '#pragma member_alignment'.  */
+
+static void
+vms_pragma_member_alignment (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  tree x;
+  int tok;
+  const char *arg;
+
+  tok = pragma_lex (&x);
+
+  if (tok == CPP_EOF)
+    {
+      /* Disable packing.  */
+      maximum_field_alignment = initial_max_fld_align;
+      return;
+    }
+  if (tok != CPP_NAME)
+    {
+      warning (OPT_Wpragmas, "malformed '#pragma member_alignment', ignoring");
+      return;
+    }
+
+  arg = IDENTIFIER_POINTER (x);
+  /* Accept '__' prefix.  */
+  if (arg[0] == '_' && arg[1] == '_')
+    arg += 2;
+
+  if (strcmp (arg, "save") == 0)
+    saved_member_alignment = maximum_field_alignment;
+  else if (strcmp (arg, "restore") == 0)
+    maximum_field_alignment = saved_member_alignment;
+  else
+    {
+      error ("unknown '#pragma member_alignment' name %s", arg);
+      return;
+    }
+  if (pragma_lex (&x) != CPP_EOF)
+    {
+      error ("malformed '#pragma member_alignment'");
+      return;
+    }
+}
+
+/* Handle '#pragma nomember_alignment'.  */
+
+static void
+vms_pragma_nomember_alignment (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  tree x;
+  int tok;
+
+  tok = pragma_lex (&x);
+  if (tok == CPP_NAME)
+    {
+      const char *arg = IDENTIFIER_POINTER (x);
+
+      /* Accept '__' prefix.  */
+      if (arg[0] == '_' && arg[1] == '_')
+        arg += 2;
+
+      if (strcmp (arg, "word") == 0)
+        maximum_field_alignment = 2 * BITS_PER_UNIT;
+      else if (strcmp (arg, "longword") == 0)
+        maximum_field_alignment = 4 * BITS_PER_UNIT;
+      else if (strcmp (arg, "quadword") == 0)
+        maximum_field_alignment = 8 * BITS_PER_UNIT;
+      else
+        {
+          error ("unhandled alignment for '#pragma nomember_alignment'");
+        }
+
+      tok = pragma_lex (&x);
+    }
+  else
+    {
+      /* Enable packing.  */
+      maximum_field_alignment = BITS_PER_UNIT;
+    }
+
+  if (tok != CPP_EOF)
+    {
+      error ("garbage at end of '#pragma nomember_alignment'");
+      return;
+    }
+}
+
+/* The 'extern model' for public data.  */
+
+enum extern_model_kind
+{
+  /* Create one overlaid section per variable.  */
+  extern_model_common_block,
+
+  /* Like unix: multiple not-initialized declarations are allowed.  */
+  extern_model_relaxed_refdef,
+
+  /* Like -fno-common.  */
+  extern_model_strict_refdef,
+
+  /* Declarations creates symbols without storage.  */
+  extern_model_globalvalue
+};
+
+/* Current and saved extern model.  */
+static enum extern_model_kind current_extern_model;
+static enum extern_model_kind saved_extern_model;
+
+/* Partial handling of '#pragma extern_model'.  */
+
+static void
+vms_pragma_extern_model (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  tree x;
+  int tok;
+  const char *arg;
+
+  tok = pragma_lex (&x);
+
+  if (tok != CPP_NAME)
+    {
+      warning (OPT_Wpragmas, "malformed '#pragma extern_model', ignoring");
+      return;
+    }
+
+  arg = IDENTIFIER_POINTER (x);
+  /* Accept "__" prefix.  */
+  if (arg[0] == '_' && arg[1] == '_')
+    arg += 2;
+
+  if (strcmp (arg, "save") == 0)
+    saved_extern_model = current_extern_model;
+  else if (strcmp (arg, "restore") == 0)
+    current_extern_model = saved_extern_model;
+  else if (strcmp (arg, "strict_refdef") == 0)
+    current_extern_model = extern_model_strict_refdef;
+  else if (strcmp (arg, "common_block") == 0)
+    current_extern_model = extern_model_common_block;
+  else if (strcmp (arg, "globalvalue") == 0)
+    {
+      sorry ("extern model globalvalue");
+      return;
+    }
+  else
+    {
+      error ("unknown '#pragma extern_model' model '%s'", arg);
+      return;
+    }
+#if 0
+  if (pragma_lex (&x) != CPP_EOF)
+    {
+      permerror (input_location, "junk at end of '#pragma extern_model'");
+      return;
+    }
+#endif
+}
+
+/* Ignore '#pragma message'.  */
+
+static void
+vms_pragma_message (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  /* Completly ignored.  */
+#if 0
+  pedwarn (input_location, OPT_Wpragmas,
+           "vms '#pragma __message' is ignored");
+#endif
+}
+
+/* Add vms-specific pragma.  */
+
+void
+vms_c_register_pragma (void)
+{
+  c_register_pragma (NULL, "__nostandard", vms_pragma_nostandard);
+  c_register_pragma (NULL, "nostandard", vms_pragma_nostandard);
+  c_register_pragma (NULL, "__standard", vms_pragma_standard);
+  c_register_pragma (NULL, "standard", vms_pragma_standard);
+  c_register_pragma (NULL, "__member_alignment", vms_pragma_member_alignment);
+  c_register_pragma (NULL, "member_alignment", vms_pragma_member_alignment);
+  c_register_pragma (NULL, "__nomember_alignment",
+                     vms_pragma_nomember_alignment);
+  c_register_pragma (NULL, "nomember_alignment",
+                     vms_pragma_nomember_alignment);
+  c_register_pragma (NULL, "__extern_model", vms_pragma_extern_model);
+  c_register_pragma (NULL, "extern_model", vms_pragma_extern_model);
+  c_register_pragma (NULL, "__message", vms_pragma_message);
+}
diff --git a/gcc/config/vms/vms-protos.h b/gcc/config/vms/vms-protos.h
index 04dcd60..c313638 100644
--- a/gcc/config/vms/vms-protos.h
+++ b/gcc/config/vms/vms-protos.h
@@ -17,5 +17,8 @@ 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/>.  */
 
+/* vms-c.c  */
+extern void vms_c_register_pragma (void);
+
 /* vms.c  */
 void vms_patch_builtins (void);
diff --git a/gcc/config/vms/vms.h b/gcc/config/vms/vms.h
index a69c7c7..0da9d85 100644
--- a/gcc/config/vms/vms.h
+++ b/gcc/config/vms/vms.h
@@ -34,6 +34,9 @@ along with GCC; see the file COPYING3.  If not see
       }                                              \
   } while (0)
 
+/* Tell compiler we want to support VMS pragmas */
+#define REGISTER_TARGET_PRAGMAS() vms_c_register_pragma ()
+
 /* By default, allow $ to be part of an identifier.  */
 #define DOLLARS_IN_IDENTIFIERS 2