https://github.com/ofiwg/ibacm/commit/7a781f6d554532995181b9efbe445599b25c271a.patch
https://bugs.gentoo.org/611778

--- a/Makefile.am
+++ b/Makefile.am
@@ -1,12 +1,13 @@
 AM_CPPFLAGS = -I$(srcdir)/include -I$(srcdir)/linux
 
 AM_CFLAGS = -g -Wall -D_GNU_SOURCE -DSYSCONFDIR=\"$(sysconfdir)\" -DBINDIR=\"$(bindir)\" -DRDMADIR=\"@rdmadir@\"
-
+AM_LDFLAGS = -lpthread -ldl
 bin_PROGRAMS = util/ib_acme
 sbin_PROGRAMS = svc/ibacm
 svc_ibacm_SOURCES = src/acm.c
 util_ib_acme_SOURCES = src/acme.c linux/acme_linux.c src/libacm.c linux/libacm_linux.c src/parse.c
 svc_ibacm_CFLAGS = $(AM_CFLAGS)
+svc_ibacm_LDFLAGS = -rdynamic $(AM_LDFLAGS)
 util_ib_acme_CFLAGS = $(AM_CFLAGS)
 
 ibacmincludedir = $(includedir)/infiniband