linux-kernel - Re: [PATCH v2 3/4] kselftest: install sanitized kernel headers before compiling

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Date:   Tue, 27 Mar 2018 15:25:41 -0600
From:   Shuah Khan <shuah@...nel.org>
To:     changbin.du@...el.com
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <shuahkh@....samsung.com>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH v2 3/4] kselftest: install sanitized kernel headers before
 compiling

On 03/26/2018 09:11 PM, changbin.du@...el.com wrote:
> From: Changbin Du <changbin.du@...el.com>
> 
> There are test cases that require kernel headers. Some of this
> cases has put the dependency check into individual Makefiles,
> but some not. Let's sync the kernel headers at top level
> Makefile to avoid compiling errors like below.
> 
> make[1]: Entering directory '/home/changbin/work/linux/tools/testing/selftests/membarrier'
> gcc -g -I../../../../usr/include/    membarrier_test.c  -o /home/changbin/work/linux/tools/testing/selftests/membarrier//membarrier_test
> membarrier_test.c: In function ‘test_membarrier_global_success’:
> membarrier_test.c:64:12: error: ‘MEMBARRIER_CMD_GLOBAL’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_GLOBAL, flags = 0;
>             ^
> membarrier_test.c:64:12: note: each undeclared identifier is reported only once for each function it appears in
> membarrier_test.c: In function ‘test_membarrier_private_expedited_fail’:
> membarrier_test.c:80:12: error: ‘MEMBARRIER_CMD_PRIVATE_EXPEDITED’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_register_private_expedited_success’:
> membarrier_test.c:103:12: error: ‘MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_private_expedited_success’:
> membarrier_test.c:120:12: error: ‘MEMBARRIER_CMD_PRIVATE_EXPEDITED’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_private_expedited_sync_core_fail’:
> membarrier_test.c:137:12: error: ‘MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_register_private_expedited_sync_core_success’:
> membarrier_test.c:160:12: error: ‘MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_private_expedited_sync_core_success’:
> membarrier_test.c:177:12: error: ‘MEMBARRIER_CMD_PRIVATE_EXPEDITED’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_register_global_expedited_success’:
> membarrier_test.c:194:12: error: ‘MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier_global_expedited_success’:
> membarrier_test.c:211:12: error: ‘MEMBARRIER_CMD_GLOBAL_EXPEDITED’ undeclared (first use in this function)
>   int cmd = MEMBARRIER_CMD_GLOBAL_EXPEDITED, flags = 0;
>             ^
> membarrier_test.c: In function ‘test_membarrier’:
> membarrier_test.c:253:15: error: ‘MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE’ undeclared (first use in this function)
>   if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
>                ^
> membarrier_test.c: In function ‘test_membarrier_query’:
> membarrier_test.c:296:14: error: ‘MEMBARRIER_CMD_GLOBAL’ undeclared (first use in this function)
>   if (!(ret & MEMBARRIER_CMD_GLOBAL)) {
>               ^
> ../lib.mk:109: recipe for target '/home/changbin/work/linux/tools/testing/selftests/membarrier//membarrier_test' failed
> make[1]: *** [/home/changbin/work/linux/tools/testing/selftests/membarrier//membarrier_test] Error 1
> make[1]: Leaving directory '/home/changbin/work/linux/tools/testing/selftests/membarrier'
> 
> Signed-off-by: Changbin Du <changbin.du@...el.com>
> ---
>  tools/testing/selftests/Makefile | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index 7916aa2..656b674 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -67,13 +67,16 @@ ifndef BUILD
>  endif
>  
>  export BUILD
> -all:
> +all: headers_install
>  	@for TARGET in $(TARGETS); do		\
>  		BUILD_TARGET=$$BUILD/$$TARGET;	\
>  		mkdir $$BUILD_TARGET  -p;	\
>  		make OUTPUT=$$BUILD_TARGET/ -C $$TARGET;\
>  	done;
>  
> +headers_install:
> +	make -C ../../../ headers_install
> +
>  run_tests: all
>  	@for TARGET in $(TARGETS); do \
>  		BUILD_TARGET=$$BUILD/$$TARGET;	\
> 

Sorry. headers_install should not be dependency to run "make kselftest".
Also this will compromise "make O=" use-case where objects are
built in a separate directory to keep the repo clean.

Individual test dependencies should be handled by test Makefiles.

thanks,
-- Shuah