Adjust glibc.req so that egrep does not cause eu-readelf to fail

glibc.req.in

@@ -28,8 +28,10 @@ eu-elfclassify --loadable --file --stdin --print | while read path; do
     if $searching; then
 	# Undefined symbols within latest, under-development
 	# (changing) symbol versions trigger the versioned RPM
-	# dependency.
-	if eu-readelf -s "$path" | egrep -q '\sUNDEF\s.*@''@SYMVER@(\s|$)'
+	# dependency.  Do not use "egrep -q" to keep reading from the
+	# pipe, avoiding a spurious EPIPE error in eu-readelf.
+	if eu-readelf -s "$path" \
+		| egrep '\sUNDEF\s.*@''@SYMVER@(\s|$)' >/dev/null
 	then
 	    echo 'glibc >= @VERSION@-@RELEASE@'
 	    # Stop searching after the first match, but keep reading from

glibc.spec

@@ -111,7 +111,7 @@
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 27%{?dist}
+Release: 28%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2212,6 +2212,9 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Sun Jun 27 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-28
+- Adjust glibc.req so that egrep does not cause eu-readelf to fail
+
 * Sun Jun 27 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-27
 - Drop glibc-revert-dtv-gap-reuse.patch, applied upstream.
 - Auto-sync with upstream branch master,