From f809ba14df46558ba67ed0b6c3b8a31658774283 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Tue, 6 Sep 2022 20:40:14 -0400
Subject: build: Fix regex in make check

make check fails when /bin/sh is dash, since dash doesn't support $''.

Commit 37dc3f5 ("build: check for trailing whitespace") added the $''
usage, presumably because it was noticed that grep doesn't accept \t.
Fix this by using [:blank:] instead.

Bug: https://bugs.gentoo.org/856436
---
 Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index 3cdbcb8..8126a0e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -18,5 +18,5 @@ apns-conf.xml: $(top_srcdir)/apns-conf.xsl $(top_srcdir)/$(SP_XML_DB)
 pkgdata_DATA = apns-conf.xml
 
 check-local:
-	grep $$'^[\t ]* <\|[ \t]$$' serviceproviders.xml && exit 1 || :
+	grep '^[[:blank:]]* <\|[[:blank:]]$$' serviceproviders.xml && exit 1 || :
 	xmllint --valid $(top_srcdir)/$(SP_XML_DB) 2>&1 >/dev/null
-- 
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