From c36e692a8e136ab91ba064535120b31bf7bb5fc7 Mon Sep 17 00:00:00 2001
From: logwang <logwang@tencent.com>
Date: Wed, 25 Oct 2017 15:19:26 +0800
Subject: [PATCH] Use `KMOD_SRCS` to pass extra kernel module sourcs.

For example, if you have an extra FreeBSD kernel module, and want to
compile it into F-Stack, you can do it like this:
```
cd f-stack/lib
export "KMOD_SRCS=/your/kmod/path/a.c /your/kmod/path/b.c"
export "CONF_CFLAGS=-I/your/kmod/path"
make
```
---
 lib/Makefile   | 3 +++
 mk/kern.pre.mk | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Makefile b/lib/Makefile
index 432c67db0..507230727 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -421,6 +421,9 @@ SRCS+= ${NETIPSEC_SRCS} ${OPENCRYPTO_SRCS} ${VM_SRCS}
 # If witness is enabled.
 # SRCS+= ${KERN_WITNESS_SRCS}
 
+# Extra FreeBSD kernel module srcs.
+SRCS+= ${KMOD_SRCS}
+
 HOST_SRCS = ${FF_HOST_SRCS}
 
 ASM_OBJS+= $(patsubst %.S,%.o,${ASM_SRCS})
diff --git a/mk/kern.pre.mk b/mk/kern.pre.mk
index 2e6af6211..a946590ad 100644
--- a/mk/kern.pre.mk
+++ b/mk/kern.pre.mk
@@ -79,7 +79,7 @@ CFLAGS+=	${CONF_CFLAGS}
 # Optional linting. This can be overridden in /etc/make.conf.
 LINTFLAGS=	${LINTOBJKERNFLAGS}
 
-NORMAL_C= ${CC} -c ${CFLAGS} ${KERNEL_CFLAGS} ${INCLUDES} ${WERROR} ${PROF} $<
+NORMAL_C= ${CC} -c ${CFLAGS} ${KERNEL_CFLAGS} ${INCLUDES} ${WERROR} ${PROF} $< -o $@
 NORMAL_S= ${CC} -c ${ASM_CFLAGS} ${INCLUDES} ${WERROR} $<
 PROFILE_C= ${CC} -c ${CFLAGS} ${KERNEL_CFLAGS} ${INCLUDES} ${WERROR} $<
 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${KERNEL_CFLAGS} ${INCLUDES} ${PROF} $<