Re: [Xenomai-core] Built-in libxenomai dependency

[Jan Kiszka <jan.kiszka@domain.hid>]

On 2012-02-01 16:17, Gilles Chanteperdrix wrote:
> On 02/01/2012 03:37 PM, Jan Kiszka wrote:
>> Hi,
>>
>> don't remember anymore: Is there any subtle reason that prevent a
>> change like
>>
>> diff --git a/src/skins/native/Makefile.am b/src/skins/native/Makefile.am
>> index 39eaaed..4cc8859 100644
>> --- a/src/skins/native/Makefile.am
>> +++ b/src/skins/native/Makefile.am
>> @@ -22,6 +22,9 @@ libnative_la_SOURCES = \
>>  	wrappers.c \
>>  	wrappers.h
>>  
>> +libnative_la_LIBADD = \
>> +	../common/libxenomai.la
>> +
>>  libnative_la_CPPFLAGS = \
>>  	@XENO_USER_CFLAGS@ \
>>  	-I$(top_srcdir)/include
>> diff --git a/src/skins/rtdm/Makefile.am b/src/skins/rtdm/Makefile.am
>> index 8ad74be..2dc0a90 100644
>> --- a/src/skins/rtdm/Makefile.am
>> +++ b/src/skins/rtdm/Makefile.am
>> @@ -8,6 +8,9 @@ librtdm_la_SOURCES = \
>>  	core.c \
>>  	init.c
>>  
>> +librtdm_la_LIBADD = \
>> +	../common/libxenomai.la
>> +
>>  librtdm_la_CPPFLAGS = \
>>  	@XENO_USER_CFLAGS@ \
>>  	-I$(top_srcdir)/include
>> diff --git a/src/testsuite/latency/Makefile.am b/src/testsuite/latency/Makefile.am
>> index c772c26..6534df5 100644
>> --- a/src/testsuite/latency/Makefile.am
>> +++ b/src/testsuite/latency/Makefile.am
>> @@ -14,5 +14,4 @@ latency_LDFLAGS = @XENO_USER_LDFLAGS@
>>  latency_LDADD = \
>>  	../../skins/native/libnative.la \
>>  	../../skins/rtdm/librtdm.la \
>> -	../../skins/common/libxenomai.la \
>>  	-lpthread -lm
>>
>> i.e. that we let the skin libraries depend on libxenomai and then remove
>> the explicit dependency from our binaries and the xeno-config output?
>> Is there some ordering issue again (we have -l<skin> before -lxenomai
>> in the ldflags).
>>
>> If possible, this would allow for things like dlopen("libnative.so").
> 
> It allows xeno-config result to work both with dynamic and static
> libraries. Static libraries have no dependency system, so, when linking
> a program whith libnative.a for instance, without libtool, you still
> have to link it with libxenomai.a.

OK, part two could stay, but the dependencies should still be added to
the skin libs - if possible.

> 
> How come you can not dlopen libnative.so, dlopening libxenomai.so before
> does not work?

Dependencies of libnative on libxenomai are not resolved when you open
the former even if the latter is already loaded. Maybe you can do this
by pulling in all required symbols one by one manually, haven't tried
yet. But that would at least be unhandy.

Jan

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