re PR testsuite/42843 (--enable-build-with-cxx plugin tests fail)

gcc:
	PR testsuite/42843
	* gcc-plugin.h (int plugin_is_GPL_compatible): Declare as extern "C".
	* doc/plugins.texi (Plugin license check): Update information
	on type of plugin_is_GPL_compatible.
	* Makefile.in (PLUGINCC): Define as $(COMPILER).
	(PLUGINCFLAGS): Define as $(COMPILER_FLAGS).
gcc/testsuite:
	PR testsuite/42843
	* gcc.dg/plugin/selfassign.c (pass_warn_self_assign): Use enumerator
	TV_NONE to initialize tv_id field.
	* g++.dg/plugin/selfassign.c (pass_warn_self_assign): Likewise.
	* gcc.dg/plugin/one_time_plugin.c (one_pass): Likewise.
	* g++.dg/plugin/dumb_plugin.c (pass_dumb_plugin_example): Likewise.
	Include toplev.h .
	* gcc.dg/plugin/finish_unit_plugin.c: Include cgraph.h.
	* g++.dg/plugin/attribute_plugin.c: Include toplev.h and plugin.h .
	* g++.dg/plugin/pragma_plugin.c: Include toplev.h .

From-SVN: r160461

gcc/ChangeLog

+2010-06-09  Joern Rennecke  <amylaar@spamcop.net>
+
+	PR testsuite/42843
+	* gcc-plugin.h (int plugin_is_GPL_compatible): Declare as extern "C".
+	* doc/plugins.texi (Plugin license check): Update information
+	on type of plugin_is_GPL_compatible.
+	* Makefile.in (PLUGINCC): Define as $(COMPILER).
+	(PLUGINCFLAGS): Define as $(COMPILER_FLAGS).
+
 2010-06-09  Bernd Schmidt  <bernds@codesourcery.com>
 
 	* config/arm/arm.c (thumb2_reorg): New function.
@@ -13,7 +22,7 @@
 
 2010-06-09  Joern Rennecke  <joern.rennecke@embecosm.com>
 
-	PR plugins/44459:
+	PR plugins/44459
 	* gcc-plugin.h: Encapsulate all declarations in extern "C".
 
 2010-06-08  Jan Hubicka  <jh@suse.cz>

gcc/Makefile.in

@@ -331,10 +331,10 @@ LTO_BINARY_READER = @LTO_BINARY_READER@
 LTO_USE_LIBELF = @LTO_USE_LIBELF@
 
 # Compiler needed for plugin support
-PLUGINCC = @CC@
+PLUGINCC = $(COMPILER)
 
 # Flags needed for plugin support
-PLUGINCFLAGS = @CFLAGS@
+PLUGINCFLAGS = $(COMPILER_FLAGS)
 
 # Libs and linker options needed for plugin support
 PLUGINLIBS = @pluginlibs@

gcc/doc/plugins.texi

@@ -50,8 +50,10 @@ fatal error: plugin <name> is not licensed under a GPL-compatible license
 compilation terminated
 @end smallexample
 
-The type of the symbol is irrelevant.  The compiler merely asserts that
-it exists in the global scope.  Something like this is enough:
+The declared type of the symbol should be int, to match a forward declaration
+in @file{gcc-plugin.h} that suppresses C++ mangling.  It does not need to be in
+any allocated section, though.  The compiler merely asserts that
+the symbol exists in the global scope.  Something like this is enough:
 
 @smallexample
 int plugin_is_GPL_compatible;

gcc/gcc-plugin.h

@@ -151,4 +151,15 @@ extern const char* default_plugin_dir_name (void);
 }
 #endif
 
+/* In case the C++ compiler does name mangling for globals, declare
+   plugin_is_GPL_compatible extern "C" so that a later definition
+   in a plugin file will have this linkage.  */
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern int plugin_is_GPL_compatible;
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* GCC_PLUGIN_H */

gcc/testsuite/ChangeLog

+2010-06-09  Joern Rennecke  <amylaar@spamcop.net>
+
+	PR testsuite/42843
+	* gcc.dg/plugin/selfassign.c (pass_warn_self_assign): Use enumerator
+	TV_NONE to initialize tv_id field.
+	* g++.dg/plugin/selfassign.c (pass_warn_self_assign): Likewise.
+	* gcc.dg/plugin/one_time_plugin.c (one_pass): Likewise.
+	* g++.dg/plugin/dumb_plugin.c (pass_dumb_plugin_example): Likewise.
+	Include toplev.h .
+	* gcc.dg/plugin/finish_unit_plugin.c: Include cgraph.h.
+	* g++.dg/plugin/attribute_plugin.c: Include toplev.h and plugin.h .
+	* g++.dg/plugin/pragma_plugin.c: Include toplev.h .
+
 2010-06-08  Sandra Loosemore  <sandra@codesourcery.com>
 
 	PR tree-optimization/39874

gcc/testsuite/g++.dg/plugin/attribute_plugin.c

@@ -8,6 +8,8 @@
 #include "tree.h"
 #include "tree-pass.h"
 #include "intl.h"
+#include "toplev.h"
+#include "plugin.h"
 
 int plugin_is_GPL_compatible;
 

gcc/testsuite/g++.dg/plugin/dumb_plugin.c

@@ -9,6 +9,7 @@
 #include "tree.h"
 #include "tree-pass.h"
 #include "intl.h"
+#include "toplev.h"
 
 int plugin_is_GPL_compatible;
 
@@ -65,7 +66,7 @@ static struct gimple_opt_pass pass_dumb_plugin_example =
     NULL,                                 /* sub */
     NULL,                                 /* next */
     0,                                    /* static_pass_number */
-    0,                                    /* tv_id */
+    TV_NONE,                              /* tv_id */
     PROP_cfg,                             /* properties_required */
     0,                                    /* properties_provided */
     0,                                    /* properties_destroyed */

gcc/testsuite/g++.dg/plugin/pragma_plugin.c

@@ -13,6 +13,7 @@
 #include "cpplib.h"
 #include "tree-pass.h"
 #include "intl.h"
+#include "toplev.h"
 
 int plugin_is_GPL_compatible;
 

gcc/testsuite/g++.dg/plugin/selfassign.c

@@ -275,7 +275,7 @@ static struct gimple_opt_pass pass_warn_self_assign =
     NULL,                                 /* sub */
     NULL,                                 /* next */
     0,                                    /* static_pass_number */
-    0,                                    /* tv_id */
+    TV_NONE,                              /* tv_id */
     PROP_ssa,                             /* properties_required */
     0,                                    /* properties_provided */
     0,                                    /* properties_destroyed */

gcc/testsuite/gcc.dg/plugin/finish_unit_plugin.c

@@ -12,6 +12,7 @@
 #include "tree.h"
 #include "tree-pass.h"
 #include "intl.h"
+#include "cgraph.h"
 
 int plugin_is_GPL_compatible;
 

gcc/testsuite/gcc.dg/plugin/one_time_plugin.c

@@ -37,7 +37,7 @@ struct gimple_opt_pass one_pass =
   NULL,                                 /* sub */
   NULL,                                 /* next */
   0,                                    /* static_pass_number */
-  0,                                    /* tv_id */
+  TV_NONE,                              /* tv_id */
   PROP_gimple_any,                      /* properties_required */
   0,                                    /* properties_provided */
   0,                                    /* properties_destroyed */

gcc/testsuite/gcc.dg/plugin/selfassign.c

@@ -275,7 +275,7 @@ static struct gimple_opt_pass pass_warn_self_assign =
     NULL,                                 /* sub */
     NULL,                                 /* next */
     0,                                    /* static_pass_number */
-    0,                                    /* tv_id */
+    TV_NONE,                              /* tv_id */
     PROP_ssa,                             /* properties_required */
     0,                                    /* properties_provided */
     0,                                    /* properties_destroyed */