RISC-V: Fix a non null-terminated string.

Fix the random error in gcc.target/riscv/target-attr-06.c.

gcc/ChangeLog:

	* config/riscv/riscv-target-attr.cc (riscv_process_target_str): Clean
	the final byte of str_to_check.

diff --git a/gcc/config/riscv/riscv-target-attr.cc b/gcc/config/riscv/riscv-target-attr.cc
index 54edeebf93c00ebdcab444012b66f4336dd7a9eb..94f0a296e305cd39e0dc45ce37aa975bf5061cc1 100644 (file)
--- a/gcc/config/riscv/riscv-target-attr.cc
+++ b/gcc/config/riscv/riscv-target-attr.cc
@@ -371,6 +371,7 @@ riscv_process_target_str (string_slice args,
 
   std::unique_ptr<char[]> buf (new char[len+1]);
   char *str_to_check = buf.get ();
+  str_to_check[len] = '\0';
   strncpy (str_to_check, args.begin (), args.size ());
 
   /* Used to catch empty spaces between semi-colons i.e.