From: Stefano Lattarini <stefano.lattarini@gmail.com>
Date: Thu, 23 Feb 2012 21:36:49 +0000 (+0100)
Subject: deptrack: avoid few forks in configure (minor optimization)
X-Git-Tag: v1.11b~86
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94259756a34b0010ee9f2e3a0f872eccd0678850;p=thirdparty%2Fautomake.git

deptrack: avoid few forks in configure (minor optimization)

* m4/depend.m4 (_AM_DEPENDENCIES): Use 'echo > file' instead of
'touch file' to ensure the creation of a dummy file.  Adjust the
comment that explains why we can't simply use ': > file': the
problem this latter idiom tickles is present also with Solaris 10
/bin/sh, not merely with Solaris 8 /bin/sh.
---

diff --git a/m4/depend.m4 b/m4/depend.m4
index 9fbf438e1..1601c637a 100644
--- a/m4/depend.m4
+++ b/m4/depend.m4
@@ -85,8 +85,8 @@ AC_CACHE_CHECK([dependency style of $depcc],
     for i in 1 2 3 4 5 6; do
       echo '#include "conftst'$i'.h"' >> sub/conftest.c
       # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
-      # Solaris 8's {/usr,}/bin/sh.
-      touch sub/conftst$i.h
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
     done
     echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf