compiler: Add -fgo-pkgpath option.

	* lang.opt: Add -fgo-pkgpath.
	* go-lang.c (go_pkgpath): New static variable.
	(go_prefix): New static variable.
	(go_langhook_init): Pass go_pkgpath and go_prefix to
	go_create_gogo.
	(go_langhook_handle_option): Handle -fgo-pkgpath.  Change
	-fgo-prefix handling to just set go_prefix.
	* go-c.h (go_set_prefix): Don't declare.
	(go_create_gogo): Add pkgpath and prefix to declaration.
	* go-gcc.cc (Gcc_backend::global_variable): Change unique_prefix
	to pkgpath.  Don't include the package name in the asm name.
	* gccgo.texi (Invoking gccgo): Document -fgo-pkgpath.  Update the
	docs for -fgo-prefix.

From-SVN: r187356

1 files changed, 7 insertions, 28 deletions

diff --git a/gcc/go/gofrontend/go.cc b/gcc/go/gofrontend/go.cc
index bfa3afd..1f2ce8a 100644
--- a/gcc/go/gofrontend/go.cc
+++ b/gcc/go/gofrontend/go.cc
@@ -13,11 +13,6 @@
 #include "backend.h"
 #include "gogo.h"
 
-// The unique prefix to use for exported symbols.  This is set during
-// option processing.
-
-static std::string unique_prefix;
-
 // The data structures we build to represent the file.
 static Gogo* gogo;
 
@@ -25,38 +20,22 @@ static Gogo* gogo;
 
 GO_EXTERN_C
 void
-go_create_gogo(int int_type_size, int pointer_size)
+go_create_gogo(int int_type_size, int pointer_size, const char *pkgpath,
+	       const char *prefix)
 {
   go_assert(::gogo == NULL);
   Linemap* linemap = go_get_linemap();
   ::gogo = new Gogo(go_get_backend(), linemap, int_type_size, pointer_size);
-  if (!unique_prefix.empty())
-    ::gogo->set_unique_prefix(unique_prefix);
+
+  if (pkgpath != NULL)
+    ::gogo->set_pkgpath(pkgpath);
+  else if (prefix != NULL)
+    ::gogo->set_prefix(prefix);
 
   // FIXME: This should be in the gcc dependent code.
   ::gogo->define_builtin_function_trees();
 }
 
-// Set the unique prefix we use for exported symbols.
-
-GO_EXTERN_C
-void
-go_set_prefix(const char* arg)
-{
-  unique_prefix = arg;
-  for (size_t i = 0; i < unique_prefix.length(); ++i)
-    {
-      char c = unique_prefix[i];
-      if ((c >= 'a' && c <= 'z')
-	  || (c >= 'A' && c <= 'Z')
-	  || (c >= '0' && c <= '9')
-	  || c == '_')
-	;
-      else
-	unique_prefix[i] = '_';
-    }
-}
-
 // Parse the input files.
 
 GO_EXTERN_C