From 83c457dc273751099190455932afe3cfe9053c78 Mon Sep 17 00:00:00 2001
From: Ian Dowse <iedowse@FreeBSD.org>
Date: Sun, 29 Aug 2004 02:00:50 +0000
Subject: [PATCH] Unconditionally add `-fno-omit-frame-pointer' to CFLAGS when
 building modules on the amd64 platform. Without this, ddb stack traces cannot
 follow module function calls, which makes debugging very difficult.

---
 sys/conf/kmod.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk
index 7fd40a7a28ba..3f76d3e4c968 100644
--- a/sys/conf/kmod.mk
+++ b/sys/conf/kmod.mk
@@ -126,6 +126,9 @@ CFLAGS+=	-fno-common
 LDFLAGS+=	-d -warn-common
 
 CFLAGS+=	${DEBUG_FLAGS}
+.if ${MACHINE_ARCH} == amd64
+CFLAGS+=	-fno-omit-frame-pointer
+.endif
 
 OBJS+=  ${SRCS:N*.h:R:S/$/.o/g}