[uml-devel] [PATCH] um: Don't build arch/x86/um/user-offsets.s with gcc plugins

[uml-devel] [PATCH] um: Don't build arch/x86/um/user-offsets.s with gcc plugins

[Thomas Meyer]

For some reasons I don't know users-offsets.s get's build before the
gcc-plugins itself.
This patch fixes the problem by not using the gcc-plugins for building
user-offsets.s

make order example:
$ make ARCH=um
  CHK     include/generated/uapi/linux/version.h
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/basic/bin2c
  HOSTCC  scripts/unifdef
  CC      arch/x86/um/user-offsets.s
  CHK     include/generated/user_constants.h
  CHK     include/config/kernel.release
  CHK     include/generated/utsrelease.h
  HOSTCXX -fPIC scripts/gcc-plugins/latent_entropy_plugin.o
  HOSTLLD -shared scripts/gcc-plugins/latent_entropy_plugin.so
  HOSTCXX -fPIC scripts/gcc-plugins/structleak_plugin.o
  HOSTLLD -shared scripts/gcc-plugins/structleak_plugin.so

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
---
 arch/x86/um/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile
index 46cbbfe..d67c78a 100644
--- a/arch/x86/um/Makefile
+++ b/arch/x86/um/Makefile
@@ -36,7 +36,7 @@ subarch-$(CONFIG_MODULES) += ../kernel/module.o
 USER_OBJS := bugs_$(BITS).o ptrace_user.o fault.o
 
 extra-y += user-offsets.s
-$(obj)/user-offsets.s: c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \
+$(obj)/user-offsets.s: c_flags = -Wp,-MD,$(depfile) $(filter-out $(GCC_PLUGINS_CFLAGS), $(USER_CFLAGS) ) \
 	-Iarch/x86/include/generated
 
 UNPROFILE_OBJS := stub_segv.o


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Re: [uml-devel] [PATCH] um: Don't build arch/x86/um/user-offsets.s with gcc plugins

[Richard Weinberger]

Thomas,

On Wed, May 17, 2017 at 10:41 PM, Thomas Meyer <thomas@m3y3r.de> wrote:
> For some reasons I don't know users-offsets.s get's build before the
> gcc-plugins itself.

Can you please figure? I want to make sure that we really fix the root cause
and not just papering over a symptom.

-- 
Thanks,
//richard

[uml-devel] [PATCH] um: Fix gcc-plugins dependency

[Thomas Meyer]

Ensure to build the gcc-plugins for user-offsets.s

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
---
 arch/um/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/Makefile b/arch/um/Makefile
index 0ca46ededfc7..7cb04d9da544 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -146,7 +146,7 @@ archclean:
 
 # Generated files
 
-$(HOST_DIR)/um/user-offsets.s: __headers FORCE
+$(HOST_DIR)/um/user-offsets.s: gcc-plugins __headers FORCE
 	$(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
 
 define filechk_gen-asm-offsets
-- 
2.13.0


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Re: [uml-devel] [PATCH] um: Fix gcc-plugins dependency

[Richard Weinberger]

Thomas,

Am 07.07.2017 um 23:10 schrieb Thomas Meyer:
> Ensure to build the gcc-plugins for user-offsets.s
> 
> Signed-off-by: Thomas Meyer <thomas@m3y3r.de>

Please describe the problem what this commit solves.
IOW the compiler error.

Thanks,
//richard

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[uml-devel] [PATCH] um: v2: Fix gcc-plugins dependency

[Thomas Meyer]

Ensure to build the gcc-plugins for user-offsets.s

The target arch/x86/um/user-offsets.s is build with normal CC flags, i.e with
gcc plugins, e.g. -fplugin=./scripts/gcc-plugins/latent_entropy_plugin.so

Ensure to build all gcc-plugins before trying to build this target; else an error
message is thrown:

cc1: error: cannot load plugin ./scripts/gcc-plugins/structleak_plugin.so
   ./scripts/gcc-plugins/structleak_plugin.so: cannot open shared object file: No such file or directory
cc1: error: cannot load plugin ./scripts/gcc-plugins/latent_entropy_plugin.so
   ./scripts/gcc-plugins/latent_entropy_plugin.so: cannot open shared object file: No such file or directory
cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so
   ./scripts/gcc-plugins/randomize_layout_plugin.so: cannot open shared object file: No such file or directory
make[1]: *** [scripts/Makefile.build:154: arch/x86/um/user-offsets.s] Error 1
make: *** [arch/um/Makefile:150: arch/x86/um/user-offsets.s] Error 2

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
---
 arch/um/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/Makefile b/arch/um/Makefile
index 0ca46ededfc7..7cb04d9da544 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -146,7 +146,7 @@ archclean:
 
 # Generated files
 
-$(HOST_DIR)/um/user-offsets.s: __headers FORCE
+$(HOST_DIR)/um/user-offsets.s: gcc-plugins __headers FORCE
 	$(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
 
 define filechk_gen-asm-offsets
-- 
2.13.0


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