Re: new macros AC_FUNC_EGREP, AC_FUNC_FGREP for POSIX 1003.1-2001 support

[Akim Demaille]

| Index: lib/autoconf/general.m4
| ===================================================================
| RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/general.m4,v
| retrieving revision 1.797
| diff -p -u -r1.797 general.m4
| --- lib/autoconf/general.m4   25 Apr 2002 08:54:47 -0000      1.797
| +++ lib/autoconf/general.m4   29 May 2002 22:10:11 -0000
| @@ -1977,7 +1977,7 @@ AC_DEFUN([_AC_RUN_LOG_STDERR],
|  [{ ($2) >&AS_MESSAGE_LOG_FD
|    ($1) 2>conftest.er1
|    ac_status=$?
| -  egrep -v '^ *\+' conftest.er1 >conftest.err
| +  grep -v '^ *+' conftest.er1 >conftest.err
|    rm -f conftest.er1
|    cat conftest.err >&AS_MESSAGE_LOG_FD
|    echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD

This was not accident.  I don't trust the portability of your change
here.  Maybe '^ *[+]' instead?  I can't find the traces of this, but
the following:

http://www.geocrawler.com/archives/3/402/2000/8/0/4274517/

| @@ -148,7 +148,7 @@ m4_defun([AC_STATE_SAVE],
|    grep '^m4_defn([m4_re_word])=' >address@hidden&address@hidden
|  test $? = 0 || rm -f address@hidden&address@hidden
|  
| -ls -1 | egrep -v '^(at-|state-|config\.)' | sort 
>address@hidden&address@hidden
| +ls -1 | sed '/^at-/d;/^state-/d;/^config\./d' | sort 
>address@hidden&address@hidden

Why did you prefer sed?


|  m4_define([AT_CHECK_DEFINES],
| -[AT_CHECK([[fgrep '#' config.h |
| - egrep -v 
'STDC_HEADERS|STD(INT|LIB)|INTTYPES|MEMORY|PACKAGE_|STRING|SYS_(TYPES|STAT)|UNISTD']],,
| +[AT_CHECK([[sed '/#/!d
| +/INTTYPES/d
| +/MEMORY/d
| +/PACKAGE_/d
| +/STDC_HEADERS/d
| +/STDINT/d
| +/STDLIB/d
| +/STRING/d
| +/SYS_STAT/d
| +/SYS_TYPES/d
| +/UNISTD/d' config.h]],,
|            [$1])])

Likewise.