[libcamera-devel] [PATCH v2] test: threads: Fix link failure due to missing dependency

[Umang Jain]

On 10/5/22 11:05 PM, Umang Jain via libcamera-devel wrote:
> Hi Laurent,
>
> On 10/5/22 9:10 PM, Laurent Pinchart via libcamera-devel wrote:
>> Commit 036d26d6677e ("test: threads: Test thread cleanup upon abnormal
>> termination") added calls to functions provided by the pthread library
>> in the threads test, but didn't add the corresponding dependency. This
>> caused a link breakage on some platforms:
>>
>> /usr/bin/ld: test/threads.p/threads.cpp.o: undefined reference to 
>> symbol 'pthread_cancel@@GLIBC_2.4'
>> /usr/bin/ld: /lib/arm-linux-gnueabihf/libpthread.so.0: error adding 
>> symbols: DSO missing from command line
>> collect2: error: ld returned 1 exit status
>>
>> The threads test binary needs to be linked with the pthread library. To
>> keep meson.build simple, link all internal tests to pthread
>> unconditionally.
>>
>> Fixes: 036d26d6677e ("test: threads: Test thread cleanup upon 
>> abnormal termination")
>> Reported-by: Naushir Patuck <naush at raspberrypi.com>
>> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
>> Reviewed-by: Naushir Patuck <naush at raspberrypi.com>
>> Tested-by: Naushir Patuck <naush at raspberrypi.com>
>> ---
>> By popular request, a simplified version. I personally think it's much
>> more of a quick & dirty solution than v1, which I still prefer over v2.
>
> I like this one for simplicity ;-)
>
> Reviewed-by: Umang Jain <umang.jain at ideasonboard.com>
>
>
> But I understand the concern linking it with every thread so I guess 
> you already have some thoughts on improving the v1 perhaps on top...

s/thread/test/
>> ---
>>   src/libcamera/base/meson.build | 2 +-
>>   src/libcamera/meson.build      | 1 +
>>   test/meson.build               | 2 +-
>>   3 files changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/src/libcamera/base/meson.build 
>> b/src/libcamera/base/meson.build
>> index 3b9d74efe935..7a75914ab2a8 100644
>> --- a/src/libcamera/base/meson.build
>> +++ b/src/libcamera/base/meson.build
>> @@ -38,9 +38,9 @@ if libunwind.found()
>>   endif
>>     libcamera_base_deps = [
>> -    dependency('threads'),
>>       libatomic,
>>       libdw,
>> +    libthreads,
>>       libunwind,
>>   ]
>>   diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
>> index 63b47b177fd2..7fcbb2ddc9e7 100644
>> --- a/src/libcamera/meson.build
>> +++ b/src/libcamera/meson.build
>> @@ -58,6 +58,7 @@ includes = [
>>   ]
>>     libatomic = cc.find_library('atomic', required : false)
>> +libthreads = dependency('threads')
>>     subdir('base')
>>   subdir('ipa')
>> diff --git a/test/meson.build b/test/meson.build
>> index 6cc778415dc8..f39f537035be 100644
>> --- a/test/meson.build
>> +++ b/test/meson.build
>> @@ -75,7 +75,7 @@ endforeach
>>     foreach t : internal_tests
>>       exe = executable(t[0], t[1],
>> -                     dependencies : libcamera_private,
>> +                     dependencies : [libcamera_private, libthreads],
>>                        link_with : test_libraries,
>>                        include_directories : test_includes_internal)
>>
>> base-commit: 487989eec64aa9f57f39b3bdcf619a5d435efac6
>