[lttng-dev] [PATCH liburcu 2/5] Dont link pthread on Android

[mathieu.desnoyers@efficios.com (Mathieu Desnoyers)]

----- Original Message -----

> From: "Charles Bri?re" <charlesbriere.flatzo@gmail.com>
> To: "Thomas Petazzoni" <thomas.petazzoni at free-electrons.com>, "Mathieu
> Desnoyers" <mathieu.desnoyers at efficios.com>
> Cc: lttng-dev at lists.lttng.org
> Sent: Friday, November 29, 2013 1:10:53 AM
> Subject: Re: [lttng-dev] [PATCH liburcu 2/5] Dont link pthread on Android

> Dear Thomas,

> To be honest, I haven't even though about other libc. But you are right, that
> is probably a better idea.

> What about adding those lines to configure.ac ( modified from configure.ac
> found in lttng-tools )

> # Check for pthread
> AC_CHECK_LIB([pthread], [pthread_create],
> [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
> [AC_CHECK_LIB([c], [pthread_create],
> [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
> [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its
> location.])]
> )]
> )

> and changing the if in the patch to "if !LIBC_INCLUDES_PTHREAD"

> Thanks for the comment,
> Charles

> Mathieu,

> if I am to submit a patch for that, should it be intended to replace this
> one, or on top of HEAD as a Fix ?

Please submit against HEAD, as a fix, since the patch discussed here was already merged. 

Thanks, 

Mathieu 

> Thanks,
> Charles

> On Thu, Nov 28, 2013 at 1:30 AM, Thomas Petazzoni <
> thomas.petazzoni at free-electrons.com > wrote:

> > Dear Charles Briere,
> 

> > On Wed, 27 Nov 2013 07:48:30 -0800, Charles Briere wrote:
> 

> > > #Add the -version-info directly here since we are only building
> 
> > > # library that use the version-info
> 
> > > -AM_LDFLAGS=-lpthread -version-info $(URCU_LIBRARY_VERSION)
> 
> > > +AM_LDFLAGS=-version-info $(URCU_LIBRARY_VERSION)
> 
> > > +if !TARGET_IS_ANDROID
> 
> > > +AM_LDFLAGS += -lpthread
> 
> > > +endif
> 

> > Instead of making that conditional on Android, wouldn't it make more
> 
> > sense to make it conditional on whether linking with pthread is
> 
> > necessary or not?
> 

> > I can at least think of one other C library than Bionic that has
> 
> > everything in libc instead of things split in several libraries: the
> 
> > Musl C library ( http://www.musl-libc.org ).
> 

> > Best regards,
> 

> > Thomas
> 
> > --
> 
> > Thomas Petazzoni, CTO, Free Electrons
> 
> > Embedded Linux, Kernel and Android engineering
> 
> > http://free-electrons.com
> 

-- 
Mathieu Desnoyers 
EfficiOS Inc. 
http://www.efficios.com 
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