https://bugs.gentoo.org/920798
https://gitlab.com/lvmteam/lvm2/-/merge_requests/4

From 39cb34e56b8c04b4d652eb9dbd643e10a05ff21c Mon Sep 17 00:00:00 2001
From: Kai Kang <kai.kang@windriver.com>
Date: Mon, 6 Nov 2023 16:44:41 +0800
Subject: [PATCH] configure.ac: check egrep

The macro AC_HEADER_STDC which requires AC_PROG_EGREP has been removed
from configure.ac, then it fails to substitute '@EGREP@':

|     [GEN] command-lines-input.h
| /bin/bash: line 2: @EGREP@: command not found
|     [GEN] command-count.h

Call AC_PROG_EGREP to fix the error.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
--- a/configure.ac
+++ b/configure.ac
@@ -78,6 +78,7 @@ AC_PROG_LN_S
 AC_PROG_MAKE_SET
 AC_PROG_MKDIR_P
 AC_PROG_RANLIB
+AC_PROG_EGREP
 AC_CHECK_TOOL([READELF], [readelf])
 AC_CHECK_TOOL(AR, ar)
 AC_PATH_TOOL(CFLOW_CMD, cflow)
-- 
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