From 60b3f4eb672a85de28ecaad47ed426f8c8fe6c32 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 20 Oct 2012 23:15:26 -0700
Subject: [PATCH] zgrep: do not assume standard 'grep' has -e

On Solaris 11, /usr/bin/grep -e does not work.
Problem reported by Petr Sumbera in
<http://lists.gnu.org/archive/html/bug-gzip/2012-10/msg00003.html>.
* Makefile.am (.in): Substitute @GREP@.
* configure.ac (AC_PROG_GREP): Invoke.
* zgrep.in (grep): Use @GREP@.
---
 Makefile.am  | 1 +
 configure.ac | 1 +
 zgrep.in     | 2 +-
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index 86a0297..90fff2d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -84,6 +84,7 @@ SUFFIXES = .in
 	$(AM_V_GEN)sed \
 		-e 's|/bin/sh|$(SHELL)|g' \
 		-e 's|[@]bindir@|'\''$(bindir)'\''|g' \
+		-e 's|[@]GREP@|$(GREP)|g' \
 		-e 's|[@]VERSION@|$(VERSION)|g' \
 		$(srcdir)/$@.in >$@-t \
 	  && chmod a+x $@-t \
diff --git a/configure.ac b/configure.ac
index 4705ce4..ecb362b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,6 +33,7 @@ AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
 AC_PROG_CC_STDC
 AM_PROG_CC_C_O
 AC_PROG_CPP
+AC_PROG_GREP
 AC_CHECK_TOOL([NM], [nm], [nm])
 AC_PROG_LN_S
 AC_PROG_RANLIB
diff --git a/zgrep.in b/zgrep.in
index f878acf..aec4a67 100644
--- a/zgrep.in
+++ b/zgrep.in
@@ -28,7 +28,7 @@ case $1 in
 esac
 PATH=$bindir:$PATH
 
-grep='${GREP-grep}'
+grep='${GREP-'\''@GREP@'\''}'
 
 version='zgrep (gzip) @VERSION@
 Copyright (C) 2010-2012 Free Software Foundation, Inc.
-- 
2.47.2