[gcc(refs/users/marxin/heads/fixinclude-speed-up)] Speed up fixincludes.

[Martin Liska <marxin@gcc.gnu.org>]

https://gcc.gnu.org/g:7c16ffb796a7f646ce5b8ea2ca32dca2418a59b2

commit 7c16ffb796a7f646ce5b8ea2ca32dca2418a59b2
Author: Martin Liska <mliska@suse.cz>
Date:   Thu Feb 3 15:49:43 2022 +0100

    Speed up fixincludes.
    
    In my case:
    $ rm ./stmp-fixinc ; time make -j16
    
    takes 17 seconds, where I can reduce it easily with the suggested
    change. Then I get to 11.2 seconds.
    
    The scripts searches ~2500 folders in my case with total 20K header
    files.
    
    fixincludes/ChangeLog:
    
            * fixinc.in: Use mkdir -p rather that a loop.

Diff:
---
 fixincludes/fixinc.in | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/fixincludes/fixinc.in b/fixincludes/fixinc.in
index de5a37f6acc..cdc0ca2e4c4 100755
--- a/fixincludes/fixinc.in
+++ b/fixincludes/fixinc.in
@@ -258,13 +258,9 @@ then echo "All directories (including links to directories):"
      echo $all_dirs
 fi
 
-for file in $all_dirs; do
-  rm -rf $LIB/$file
-  if [ ! -d $LIB/$file ]
-  then mkdir $LIB/$file
-  fi
-done
-mkdir $LIB/root
+cd $LIB
+mkdir -p $all_dirs
+cd ..
 
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