https://bugs.gentoo.org/772992

From: Sam James <sam@gentoo.org>
Date: Tue, 26 Oct 2021 06:44:07 +0100
Subject: [PATCH] Link against pthread for libgloox
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -47,7 +47,7 @@ libgloox_la_SOURCES = jid.cpp parser.cpp connectiontcpclient.cpp clientbase.cpp
                         iodata.cpp
 
 libgloox_la_LDFLAGS = -version-info 18:0:0 -Wl,--no-undefined -Wl,--no-allow-shlib-undefined
-libgloox_la_LIBADD =
+libgloox_la_LIBADD = @PTHREAD_LIBS@
 libgloox_la_CFLAGS = $(CPPFLAGS)
 
 libglooxincludedir = $(includedir)/gloox