[gcc r12-41] Fix clang warning (-Wstring-plus-int)

[gcc r12-41] Fix clang warning (-Wstring-plus-int)

[Martin Liska]

https://gcc.gnu.org/g:e9fc9d075f303b50c77c7b497b2982fe6dc7f5c1

commit r12-41-ge9fc9d075f303b50c77c7b497b2982fe6dc7f5c1
Author: Martin Liska <mliska@suse.cz>
Date:   Wed Apr 21 16:52:17 2021 +0200

    Fix clang warning (-Wstring-plus-int)
    
    This fixes:
    
    lto-plugin.c:642:7: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
    
    lto-plugin/ChangeLog:
    
            * lto-plugin.c (exec_lto_wrapper): Make a temp variable.

Diff:
---
 lto-plugin/lto-plugin.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lto-plugin/lto-plugin.c b/lto-plugin/lto-plugin.c
index 32478f070e8..4e90ce03ade 100644
--- a/lto-plugin/lto-plugin.c
+++ b/lto-plugin/lto-plugin.c
@@ -636,10 +636,10 @@ exec_lto_wrapper (char *argv[])
 
   /* Write argv to a file to avoid a command line that is too long
      Save the file locally on save-temps.  */
+  const char *suffix = ".lto_wrapper_args";
+  suffix += skip_in_suffix;
   if (save_temps && link_output_name)
-    arguments_file_name = concat (link_output_name,
-				  ".lto_wrapper_args"
-				  + skip_in_suffix, NULL);
+    arguments_file_name = concat (link_output_name, suffix, NULL);
   else
     arguments_file_name = make_temp_file (".lto_wrapper_args");
   check (arguments_file_name, LDPL_FATAL,