[LTP] running LTP on uClinux

[LTP] running LTP on uClinux

[David Marlin]

I was building LTP to test a uClinux system, but encountered some
problems.  As far as I could tell UCLINUX=1 is not being passed to all
testcases when defined at the top level before running make.

   export UCLINUX=1
   make


I modified the following file and the build proceeded as expected:

--- include/mk/testcases.mk.orig     2010-04-01 01:23:08.000000000 -0500
+++ include/mk/testcases.mk     2010-07-01 17:38:10.240628708 -0500
@@ -53,3 +53,8 @@

  $(APICMDS_DIR) $(LIBLTP_DIR) $(abs_top_builddir)/$(TKI_DIR): %:
         mkdir -p "$@"
+
+ifeq ($(UCLINUX),1)
+CFLAGS                  += -D__UCLIBC__ -DUCLINUX
+endif


Has anyone else had to make similar changes in order to build LTP for
uClinux?


d.marlin



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Re: [LTP] running LTP on uClinux

[Garrett Cooper]

[-- Attachment #1: Type: text/plain, Size: 1114 bytes --]

On Tue, Aug 17, 2010 at 8:58 AM, David Marlin <dmarlin@redhat.com> wrote:
>
> I was building LTP to test a uClinux system, but encountered some
> problems.  As far as I could tell UCLINUX=1 is not being passed to all
> testcases when defined at the top level before running make.
>
>   export UCLINUX=1
>   make
>
>
> I modified the following file and the build proceeded as expected:
>
> --- include/mk/testcases.mk.orig     2010-04-01 01:23:08.000000000 -0500
> +++ include/mk/testcases.mk     2010-07-01 17:38:10.240628708 -0500
> @@ -53,3 +53,8 @@
>
>  $(APICMDS_DIR) $(LIBLTP_DIR) $(abs_top_builddir)/$(TKI_DIR): %:
>         mkdir -p "$@"
> +
> +ifeq ($(UCLINUX),1)
> +CFLAGS                  += -D__UCLIBC__ -DUCLINUX
> +endif
>
>
> Has anyone else had to make similar changes in order to build LTP for
> uClinux?

It should be CPPFLAGS, and the definition should be in env_post.mk; I
never had a UCLINUX infrastructure to test with, so this might have
fallen between the cracks by accident about 8 months ago.

Let me know how this patch works for you.

Thanks,
-Garrett

[-- Attachment #2: fix-ltp-uclinux-compiles.diff --]
[-- Type: application/octet-stream, Size: 496 bytes --]

diff --git a/include/mk/env_post.mk b/include/mk/env_post.mk
index 56aca27..ebaee1f 100644
--- a/include/mk/env_post.mk
+++ b/include/mk/env_post.mk
@@ -37,6 +37,10 @@ CPPFLAGS			+= -I$(top_srcdir)/include -I$(top_builddir)/include
 
 LDFLAGS				+= -L$(top_builddir)/lib
 
+ifeq ($(UCLINUX),1)
+CPPFLAGS			+= -D__UCLIBC__ -DUCLINUX
+endif
+
 MAKE_TARGETS			?= $(notdir $(patsubst %.c,%,$(wildcard $(abs_srcdir)/*.c)))
 
 MAKE_TARGETS			:= $(filter-out $(FILTER_OUT_MAKE_TARGETS),$(MAKE_TARGETS))

[-- Attachment #3: Type: text/plain, Size: 224 bytes --]

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Re: [LTP] running LTP on uClinux

[Mike Frysinger]

On Tue, Aug 17, 2010 at 12:31 PM, Garrett Cooper wrote:
> It should be CPPFLAGS, and the definition should be in env_post.mk; I
> never had a UCLINUX infrastructure to test with, so this might have
> fallen between the cracks by accident about 8 months ago.

building for a nommu target should work even when you're running a mmu
toolchain for an mmu target.  the testcases simply assume things like
fork() wont work and so fall back to ones that work in both places
(like vfork).  the tests should be able to run & pass even with a mmu.

> Let me know how this patch works for you.

the logic in lib/Makefile should be unified with this
-mike

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Re: [LTP] running LTP on uClinux

[David Marlin]

Garrett Cooper wrote:
> On Tue, Aug 17, 2010 at 8:58 AM, David Marlin <dmarlin@redhat.com> wrote:
>> I was building LTP to test a uClinux system, but encountered some
>> problems.  As far as I could tell UCLINUX=1 is not being passed to all
>> testcases when defined at the top level before running make.
>>
>>   export UCLINUX=1
>>   make
>>
>>
>> I modified the following file and the build proceeded as expected:
>>
>> --- include/mk/testcases.mk.orig     2010-04-01 01:23:08.000000000 -0500
>> +++ include/mk/testcases.mk     2010-07-01 17:38:10.240628708 -0500
>> @@ -53,3 +53,8 @@
>>
>>  $(APICMDS_DIR) $(LIBLTP_DIR) $(abs_top_builddir)/$(TKI_DIR): %:
>>         mkdir -p "$@"
>> +
>> +ifeq ($(UCLINUX),1)
>> +CFLAGS                  += -D__UCLIBC__ -DUCLINUX
>> +endif
>>
>>
>> Has anyone else had to make similar changes in order to build LTP for
>> uClinux?
> 
> It should be CPPFLAGS, and the definition should be in env_post.mk; I
> never had a UCLINUX infrastructure to test with, so this might have
> fallen between the cracks by accident about 8 months ago.
> 
> Let me know how this patch works for you.

The patch works for me.  Thank you.

I am now seeing some other UCLINUX related problems/questions with 
individual testcases, but will follow up in separate emails on those.


Thanks again,

d.marlin
==========

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Re: [LTP] running LTP on uClinux

[Garrett Cooper]

On Tue, Aug 17, 2010 at 9:42 AM, Mike Frysinger <vapier@gentoo.org> wrote:
> On Tue, Aug 17, 2010 at 12:31 PM, Garrett Cooper wrote:
>> It should be CPPFLAGS, and the definition should be in env_post.mk; I
>> never had a UCLINUX infrastructure to test with, so this might have
>> fallen between the cracks by accident about 8 months ago.
>
> building for a nommu target should work even when you're running a mmu
> toolchain for an mmu target.  the testcases simply assume things like
> fork() wont work and so fall back to ones that work in both places
> (like vfork).  the tests should be able to run & pass even with a mmu.

Ok.

>> Let me know how this patch works for you.
>
> the logic in lib/Makefile should be unified with this

lib.mk picks up env_post.mk, so it's already caught there. Or are you
referring to how libltp is built and what headers are picked up from
include/ ?
Thanks!
-Garrett

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Re: [LTP] running LTP on uClinux

[Mike Frysinger]

On Tue, Aug 17, 2010 at 3:51 PM, Garrett Cooper wrote:
> On Tue, Aug 17, 2010 at 9:42 AM, Mike Frysinger wrote:
>> On Tue, Aug 17, 2010 at 12:31 PM, Garrett Cooper wrote:
>>> Let me know how this patch works for you.
>>
>> the logic in lib/Makefile should be unified with this
>
> lib.mk picks up env_post.mk, so it's already caught there. Or are you
> referring to how libltp is built and what headers are picked up from
> include/ ?

i mean there should not be more than one place in the whole tree which
adds -DUCLINUX/etc...  if we merge your patch, there will be.  i'm not
saying your patch is wrong, just that something needs fixing to avoid
the aforementioned scenario.
-mike

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Re: [LTP] running LTP on uClinux

[Garrett Cooper]

On Tue, Aug 17, 2010 at 12:58 PM, Mike Frysinger <vapier@gentoo.org> wrote:
> On Tue, Aug 17, 2010 at 3:51 PM, Garrett Cooper wrote:
>> On Tue, Aug 17, 2010 at 9:42 AM, Mike Frysinger wrote:
>>> On Tue, Aug 17, 2010 at 12:31 PM, Garrett Cooper wrote:
>>>> Let me know how this patch works for you.
>>>
>>> the logic in lib/Makefile should be unified with this
>>
>> lib.mk picks up env_post.mk, so it's already caught there. Or are you
>> referring to how libltp is built and what headers are picked up from
>> include/ ?
>
> i mean there should not be more than one place in the whole tree which
> adds -DUCLINUX/etc...  if we merge your patch, there will be.  i'm not
> saying your patch is wrong, just that something needs fixing to avoid
> the aforementioned scenario.

Sure. I had forgotten whether or not there was still a reference to
UCLINUX in lib/Makefile. Thanks for the reminder :).
-Garrett

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