um: do not evaluate compiler's library path when cleaning
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Message ID 20200417180455.1174340-1-masahiroy@kernel.org
State New
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Series
  • um: do not evaluate compiler's library path when cleaning
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Commit Message

Masahiro Yamada April 17, 2020, 6:04 p.m. UTC
Since commit a83e4ca26af8 ("kbuild: remove cc-option switch from
-Wframe-larger-than="), 'make ARCH=um clean' emits an error message
as follows:

  $ make ARCH=um clean
  gcc: error: missing argument to '-Wframe-larger-than='

We do not care compiler flags when cleaning.

Use the '=' operator for lazy expansion because we do not use
LDFLAGS_pcap.o or LDFLAGS_vde.o when cleaning.

While I was here, I removed the redundant -r option because it
already exists in the recipe.

Fixes: a83e4ca26af8 ("kbuild: remove cc-option switch from -Wframe-larger-than=")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 arch/um/drivers/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Nathan Chancellor April 17, 2020, 10:19 p.m. UTC | #1
On Sat, Apr 18, 2020 at 03:04:55AM +0900, Masahiro Yamada wrote:
> Since commit a83e4ca26af8 ("kbuild: remove cc-option switch from
> -Wframe-larger-than="), 'make ARCH=um clean' emits an error message
> as follows:
> 
>   $ make ARCH=um clean
>   gcc: error: missing argument to '-Wframe-larger-than='
> 
> We do not care compiler flags when cleaning.
> 
> Use the '=' operator for lazy expansion because we do not use
> LDFLAGS_pcap.o or LDFLAGS_vde.o when cleaning.
> 
> While I was here, I removed the redundant -r option because it
> already exists in the recipe.
> 
> Fixes: a83e4ca26af8 ("kbuild: remove cc-option switch from -Wframe-larger-than=")
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
> 
>  arch/um/drivers/Makefile | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
> index a290821e355c..2a249f619467 100644
> --- a/arch/um/drivers/Makefile
> +++ b/arch/um/drivers/Makefile
> @@ -18,9 +18,9 @@ ubd-objs := ubd_kern.o ubd_user.o
>  port-objs := port_kern.o port_user.o
>  harddog-objs := harddog_kern.o harddog_user.o
>  
> -LDFLAGS_pcap.o := -r $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
> +LDFLAGS_pcap.o = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
>  
> -LDFLAGS_vde.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
> +LDFLAGS_vde.o = $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
>  
>  targets := pcap_kern.o pcap_user.o vde_kern.o vde_user.o
>  
> -- 
> 2.25.1
> 

I tested building pcap.o both before and after this change, no changes
there.

I do see the clean error fixed.

Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com> [build]
Masahiro Yamada May 1, 2020, 5:44 a.m. UTC | #2
On Sat, Apr 18, 2020 at 3:06 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> Since commit a83e4ca26af8 ("kbuild: remove cc-option switch from
> -Wframe-larger-than="), 'make ARCH=um clean' emits an error message
> as follows:
>
>   $ make ARCH=um clean
>   gcc: error: missing argument to '-Wframe-larger-than='
>
> We do not care compiler flags when cleaning.
>
> Use the '=' operator for lazy expansion because we do not use
> LDFLAGS_pcap.o or LDFLAGS_vde.o when cleaning.
>
> While I was here, I removed the redundant -r option because it
> already exists in the recipe.
>
> Fixes: a83e4ca26af8 ("kbuild: remove cc-option switch from -Wframe-larger-than=")
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
>
>  arch/um/drivers/Makefile | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
> index a290821e355c..2a249f619467 100644
> --- a/arch/um/drivers/Makefile
> +++ b/arch/um/drivers/Makefile
> @@ -18,9 +18,9 @@ ubd-objs := ubd_kern.o ubd_user.o
>  port-objs := port_kern.o port_user.o
>  harddog-objs := harddog_kern.o harddog_user.o
>
> -LDFLAGS_pcap.o := -r $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
> +LDFLAGS_pcap.o = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
>
> -LDFLAGS_vde.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
> +LDFLAGS_vde.o = $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
>
>  targets := pcap_kern.o pcap_user.o vde_kern.o vde_user.o
>
> --
> 2.25.1
>


Applied to linux-kbuild.

Patch
diff mbox series

diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
index a290821e355c..2a249f619467 100644
--- a/arch/um/drivers/Makefile
+++ b/arch/um/drivers/Makefile
@@ -18,9 +18,9 @@  ubd-objs := ubd_kern.o ubd_user.o
 port-objs := port_kern.o port_user.o
 harddog-objs := harddog_kern.o harddog_user.o
 
-LDFLAGS_pcap.o := -r $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
+LDFLAGS_pcap.o = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
 
-LDFLAGS_vde.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
+LDFLAGS_vde.o = $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
 
 targets := pcap_kern.o pcap_user.o vde_kern.o vde_user.o