Build assembly files with debug info
diff --git a/Makefile.am b/Makefile.am
index 521d378..84c1d53 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -190,7 +190,7 @@
 libffi_la_LDFLAGS = -version-info `grep -v '^\#' $(srcdir)/libtool-version` $(LTLDFLAGS) $(AM_LTLDFLAGS)
 
 AM_CPPFLAGS = -I. -I$(top_srcdir)/include -Iinclude -I$(top_srcdir)/src
-AM_CCASFLAGS = $(AM_CPPFLAGS)
+AM_CCASFLAGS = $(AM_CPPFLAGS) -g
 
 # No install-html or install-pdf support in automake yet
 .PHONY: install-html install-pdf