[PATCH] netfilter: fix make target xt_TCPMSS.o error.

[PATCH] netfilter: fix make target xt_TCPMSS.o error.

[Huang Qijun]

When compiling netfilter, there will be an error
"No rule to make target 'net/netfilter/xt_TCPMSS.o'",
because the xt_TCPMSS.c in the makefile is uppercase,
and the file name of the source file (xt_tcpmss.c) is lowercase.
Therefore, change the xt_TCPMSS.c name in the makefile to all lowercase.

Signed-off-by: Huang Qijun <dknightjun@gmail.com>
---
 net/netfilter/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 0e0ded87e27b..b974ade24556 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -157,7 +157,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_REDIRECT) += xt_REDIRECT.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_MASQUERADE) += xt_MASQUERADE.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_TPROXY) += xt_TPROXY.o
-obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_tcpmss.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP) += xt_TCPOPTSTRIP.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_TEE) += xt_TEE.o
 obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o
-- 
2.17.1

Re: [PATCH] netfilter: fix make target xt_TCPMSS.o error.

[Jan Engelhardt]

On Wednesday 2020-05-06 08:50, Huang Qijun wrote:

>When compiling netfilter, there will be an error
>"No rule to make target 'net/netfilter/xt_TCPMSS.o'",
>because the xt_TCPMSS.c in the makefile is uppercase,
>and the file name of the source file (xt_tcpmss.c) is lowercase.

>-obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_TCPMSS.o
>+obj-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += xt_tcpmss.o

Uhm, no:

11:07 a4:../net/netfilter » ls -l xt_*[Mm][Ss]*.c
-rw-r--r-- 1 jengelh users 8948 Feb 27 09:30 xt_TCPMSS.c
-rw-r--r-- 1 jengelh users 2459 Feb 27 09:30 xt_tcpmss.c

Re: [PATCH] netfilter: fix make target xt_TCPMSS.o error.

[Cong Wang]

On Tue, May 5, 2020 at 11:52 PM Huang Qijun <dknightjun@gmail.com> wrote:
>
> When compiling netfilter, there will be an error
> "No rule to make target 'net/netfilter/xt_TCPMSS.o'",
> because the xt_TCPMSS.c in the makefile is uppercase,
> and the file name of the source file (xt_tcpmss.c) is lowercase.
> Therefore, change the xt_TCPMSS.c name in the makefile to all lowercase.

This is what you will get when you compile Linux kernel
on a case-insensitive filesystem like MacOS.

Please use a case-sensitive one.