https://github.com/cyrusimap/cyrus-imapd/pull/4235
https://bugs.gentoo.org/721466

From 6fb292c3a071febfdb514589f12cc8d4b7329b53 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 15 Sep 2022 00:54:51 +0100
Subject: [PATCH 2/2] Avoid underlinking libcyrus (-lm)

Fixes building with lld.

Bug: https://bugs.gentoo.org/721466
Signed-off-by: Sam James <sam@gentoo.org>
--- a/Makefile.am
+++ b/Makefile.am
@@ -1538,7 +1538,7 @@ lib_libcyrus_la_SOURCES += lib/nonblock_fcntl.c
 else
 lib_libcyrus_la_SOURCES += lib/nonblock_ioctl.c
 endif
-lib_libcyrus_la_LIBADD = libcrc32.la ${LIB_SASL} $(SSL_LIBS) $(GCOV_LIBS)
+lib_libcyrus_la_LIBADD = libcrc32.la ${LIB_SASL} $(SSL_LIBS) $(GCOV_LIBS) $(LIBM)
 lib_libcyrus_la_CFLAGS = $(AM_CFLAGS) $(CFLAG_VISIBILITY)
 
 if USE_ZEROSKIP