[PATCH] selftests: allow detection of build failures

[PATCH] selftests: allow detection of build failures

[Jiri Benc]

Commit 5f70bde26a48 ("selftests: fix build behaviour on targets' failures")
added a logic to track failure of builds of individual targets. However, it
does exactly the opposite of what a distro kernel needs: we create a RPM
package with a selected set of selftests and we need the build to fail if
build of any of the targets fail.

Both use cases are valid. A distribution kernel is in control of what is
included in the kernel and what is being built; any error needs to be
flagged and acted upon. A CI system that tries to build as many tests as
possible on the best effort basis is not really interested in a failure here
and there.

Support both use cases by introducing a FORCE_TARGETS variable. It is
switched off by default to make life for CI systems easier, distributions
can easily switch it on while building their packages.

Reported-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
---
 tools/testing/selftests/Makefile | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 5182d6078cbc..97fca70d2cd6 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -74,6 +74,12 @@ ifneq ($(SKIP_TARGETS),)
 	override TARGETS := $(TMP)
 endif
 
+# User can set FORCE_TARGETS to 1 to require all targets to be successfully
+# built; make will fail if any of the targets cannot be built. If
+# FORCE_TARGETS is not set (the default), make will succeed if at least one
+# of the targets gets built.
+FORCE_TARGETS ?=
+
 # Clear LDFLAGS and MAKEFLAGS if called from main
 # Makefile to avoid test build failures when test
 # Makefile doesn't have explicit build rules.
@@ -148,7 +154,8 @@ all: khdr
 	for TARGET in $(TARGETS); do				\
 		BUILD_TARGET=$$BUILD/$$TARGET;			\
 		mkdir $$BUILD_TARGET  -p;			\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET;	\
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET	\
+				$(if $(FORCE_TARGETS),|| exit);	\
 		ret=$$((ret * $$?));				\
 	done; exit $$ret;
 
@@ -202,7 +209,8 @@ ifdef INSTALL_PATH
 	@ret=1;	\
 	for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install \
+				$(if $(FORCE_TARGETS),|| exit);	\
 		ret=$$((ret * $$?));		\
 	done; exit $$ret;
 
-- 
2.18.1

Re: [PATCH] selftests: allow detection of build failures

[Cristian Marussi]

Hi Jiri

On 06/02/2020 08:40, Jiri Benc wrote:
> Commit 5f70bde26a48 ("selftests: fix build behaviour on targets' failures")
> added a logic to track failure of builds of individual targets. However, it
> does exactly the opposite of what a distro kernel needs: we create a RPM
> package with a selected set of selftests and we need the build to fail if
> build of any of the targets fail.
> 
> Both use cases are valid. A distribution kernel is in control of what is
> included in the kernel and what is being built; any error needs to be
> flagged and acted upon. A CI system that tries to build as many tests as
> possible on the best effort basis is not really interested in a failure here
> and there.
> 
> Support both use cases by introducing a FORCE_TARGETS variable. It is
> switched off by default to make life for CI systems easier, distributions
> can easily switch it on while building their packages.
> 

Fine for me. My concerns as you said were only for CI systems and the fact that the build
was failing in a non-deterministic way depending on the outcome of the last built subsystem
only: I hadn't considered the opposite needs of a package build system. Sorry for that.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>

Regards

Cristian

> Reported-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
> Signed-off-by: Jiri Benc <jbenc@redhat.com>
> ---
>  tools/testing/selftests/Makefile | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
> index 5182d6078cbc..97fca70d2cd6 100644
> --- a/tools/testing/selftests/Makefile
> +++ b/tools/testing/selftests/Makefile
> @@ -74,6 +74,12 @@ ifneq ($(SKIP_TARGETS),)
>  	override TARGETS := $(TMP)
>  endif
>  
> +# User can set FORCE_TARGETS to 1 to require all targets to be successfully
> +# built; make will fail if any of the targets cannot be built. If
> +# FORCE_TARGETS is not set (the default), make will succeed if at least one
> +# of the targets gets built.
> +FORCE_TARGETS ?=
> +
>  # Clear LDFLAGS and MAKEFLAGS if called from main
>  # Makefile to avoid test build failures when test
>  # Makefile doesn't have explicit build rules.
> @@ -148,7 +154,8 @@ all: khdr
>  	for TARGET in $(TARGETS); do				\
>  		BUILD_TARGET=$$BUILD/$$TARGET;			\
>  		mkdir $$BUILD_TARGET  -p;			\
> -		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET;	\
> +		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET	\
> +				$(if $(FORCE_TARGETS),|| exit);	\
>  		ret=$$((ret * $$?));				\
>  	done; exit $$ret;
>  
> @@ -202,7 +209,8 @@ ifdef INSTALL_PATH
>  	@ret=1;	\
>  	for TARGET in $(TARGETS); do \
>  		BUILD_TARGET=$$BUILD/$$TARGET;	\
> -		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
> +		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install \
> +				$(if $(FORCE_TARGETS),|| exit);	\
>  		ret=$$((ret * $$?));		\
>  	done; exit $$ret;
>  
>