Fix bug where static forward declarations weren't accepted.

This allows us to fix non-ISO-C constructs in our kernel to legal ISO-C.

Submitted by:	rodrigc
Obtained from:	http://gcc.gnu.org/ml/gcc-patches/2005-09/msg00006.html

10 files changed, 160 insertions, 0 deletions

diff --git a/lang/gcc/files/patch-c-decl.c b/lang/gcc/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc34/files/patch-c-decl.c b/lang/gcc34/files/patch-c-decl.c
new file mode 100644
index 000000000000..cf7e46182736
--- /dev/null
+++ b/lang/gcc34/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Mon Aug  8 00:42:26 2005
++++ gcc/c-decl.c	Wed Sep  7 02:41:09 2005
+@@ -1271,7 +1271,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning ("%Jredundant redeclaration of '%D'", newdecl, newdecl);
+       warned = true;
diff --git a/lang/gcc41/files/patch-c-decl.c b/lang/gcc41/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc41/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc42/files/patch-c-decl.c b/lang/gcc42/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc42/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc43/files/patch-c-decl.c b/lang/gcc43/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc43/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc44/files/patch-c-decl.c b/lang/gcc44/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc44/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc45/files/patch-c-decl.c b/lang/gcc45/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc45/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc46/files/patch-c-decl.c b/lang/gcc46/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc46/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc47/files/patch-c-decl.c b/lang/gcc47/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc47/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);
diff --git a/lang/gcc48/files/patch-c-decl.c b/lang/gcc48/files/patch-c-decl.c
new file mode 100644
index 000000000000..620989f79100
--- /dev/null
+++ b/lang/gcc48/files/patch-c-decl.c
@@ -0,0 +1,16 @@
+$FreeBSD$
+
+--- gcc/c-decl.c.orig	Wed Aug 17 17:21:28 2005
++++ gcc/c-decl.c	Wed Sep  7 02:18:44 2005
+@@ -1555,7 +1555,10 @@ diagnose_mismatched_decls (tree newdecl,
+       && !(DECL_EXTERNAL (olddecl) && !DECL_EXTERNAL (newdecl))
+       /* Don't warn about forward parameter decls.  */
+       && !(TREE_CODE (newdecl) == PARM_DECL
+-	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl)))
++	   && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
++      /* Don't warn about a variable definition following a declaration.  */
++      && !(TREE_CODE (newdecl) == VAR_DECL
++	   && DECL_INITIAL (newdecl) && !DECL_INITIAL (olddecl)))
+     {
+       warning (OPT_Wredundant_decls, "redundant redeclaration of %q+D",
+ 	       newdecl);