diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 807dfcfa..b0bfd9c4 100755
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -3133,7 +3133,7 @@ build_unary_op (code, xarg, noconvert)
       return fold (build1 (code, argtype, arg));
     }
 
-  error (errstring);
+  error ("%s", errstring);
   return error_mark_node;
 }
 
diff --git a/gcc/real.c b/gcc/real.c
index 456edda0..7943b634 100755
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -4042,8 +4042,6 @@ mtherr (name, code)
      char *name;
      int code;
 {
-  char errstr[80];
-
   /* The string passed by the calling program is supposed to be the
      name of the function in which the error occurred.
      The code argument selects which error message string will be printed.  */
@@ -4066,9 +4064,8 @@ mtherr (name, code)
     name = "modulus";
   else if (strcmp (name, "esqrt") == 0)
     name = "square root";
-  sprintf (errstr, "%s during real %s", ermsg[code], name);
   if (extra_warnings)
-    warning (errstr);
+    warning ("%s during real %s", ermsg[code], name);
   /* Set global error message word */
   merror = code + 1;
 }
diff --git a/gcc/toplev.c b/gcc/toplev.c
index f707c28b..ac8e21b7 100755
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -1061,7 +1061,7 @@ fatal_io_error(char *name)
 void
 fatal_insn(char *message, rtx insn)
 {
-    error(message);
+    error("%s", message);
     debug_rtx(insn);
     if (asm_out_file)
         fflush(asm_out_file);
diff --git a/gcc_arm/c-common.c b/gcc_arm/c-common.c
index 936b6096..861b194b 100755
--- a/gcc_arm/c-common.c
+++ b/gcc_arm/c-common.c
@@ -1587,7 +1587,7 @@ check_format_info (info, params)
 	      ++format_chars;
 	      if (params == 0)
 		{
-		  warning (tfaff);
+		  warning ("%s", tfaff);
 		  return;
 		}
 	      if (info->first_arg_num != 0)
@@ -1630,7 +1630,7 @@ check_format_info (info, params)
 		      ++format_chars;
 		      if (params == 0)
 		        {
-			  warning (tfaff);
+			  warning ("%s", tfaff);
 			  return;
 			}
 		      cur_param = TREE_VALUE (params);
@@ -1825,7 +1825,7 @@ check_format_info (info, params)
 	continue;
       if (params == 0)
 	{
-	  warning (tfaff);
+	  warning ("%s", tfaff);
 	  return;
 	}
       cur_param = TREE_VALUE (params);
diff --git a/gcc_arm/c-typeck.c b/gcc_arm/c-typeck.c
index ab3ede71..583793a3 100755
--- a/gcc_arm/c-typeck.c
+++ b/gcc_arm/c-typeck.c
@@ -3147,7 +3147,7 @@ build_unary_op (code, xarg, noconvert)
       return fold (build1 (code, argtype, arg));
     }
 
-  error (errstring);
+  error ("%s", errstring);
   return error_mark_node;
 }
 
diff --git a/gcc_arm/cccp.c b/gcc_arm/cccp.c
index 76ae6137..d95a67c0 100755
--- a/gcc_arm/cccp.c
+++ b/gcc_arm/cccp.c
@@ -8676,7 +8676,7 @@ macroexpand (hp, op)
       else
 	parse_error = macarg (NULL_PTR, 0);
       if (parse_error) {
-	error_with_line (line_for_error (start_line), parse_error);
+	error_with_line (line_for_error (start_line), "%s", parse_error);
 	break;
       }
       i++;
diff --git a/gcc_arm/real.c b/gcc_arm/real.c
index 7c67f4eb..1a187efb 100755
--- a/gcc_arm/real.c
+++ b/gcc_arm/real.c
@@ -5703,8 +5703,6 @@ mtherr (name, code)
      char *name;
      int code;
 {
-  char errstr[80];
-
   /* The string passed by the calling program is supposed to be the
      name of the function in which the error occurred.
      The code argument selects which error message string will be printed.  */
@@ -5727,9 +5725,8 @@ mtherr (name, code)
     name = "modulus";
   else if (strcmp (name, "esqrt") == 0)
     name = "square root";
-  sprintf (errstr, "%s during real %s", ermsg[code], name);
   if (extra_warnings)
-    warning (errstr);
+    warning ("%s during real %s", ermsg[code], name);
   /* Set global error message word */
   merror = code + 1;
 }
diff --git a/gcc_arm/toplev.c b/gcc_arm/toplev.c
index 29833dad..c16480e4 100755
--- a/gcc_arm/toplev.c
+++ b/gcc_arm/toplev.c
@@ -1393,7 +1393,7 @@ fatal_insn (message, insn)
      char *message;
      rtx insn;
 {
-  error (message);
+  error ("%s", message);
   debug_rtx (insn);
   if (asm_out_file)
     fflush (asm_out_file);
diff --git a/libc/Makefile b/libc/Makefile
index d9de489f..25e47c03 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -15,7 +15,7 @@ export AR := $(PREFIX)ar
 export AS := $(PREFIX)as
 endif
 
-SHELL := /bin/bash -o pipefail
+SHELL := bash -o pipefail
 
 ASFLAGS := -mcpu=arm7tdmi