[libdispatch-dev] [PATCH] missing kqueue libs in testing/Makefile.am
Mark Heily
mark at heily.com
Wed Nov 18 19:31:06 PST 2009
Paolo Bonzini wrote:
> On 11/18/2009 05:26 AM, Mark Heily wrote:
>>
>> I believe that libkqueue r101 solves this problem by changing the output
>> of `pkg-config --libs` from this:
>>
>> -L${libdir} -lkqueue
>>
>> to this:
>>
>> ${libdir}/libkqueue.la
>
> Does it actually make a difference? libtool should look for the .la
> file anyway, and now you've forced every libkqueue.pc client to use
> libtool... :-)
>
> Paolo
Good question. The description of PKG_CHECK_MODULES Autoconf macro in the
pkg-config manpage doesn't say anything about libtool [1]. Likewise, the
libtool documentation doesn't say anything about pkg-config. I assumed that
adding the .la file to the .pc file was the only way to get them to work
together.
However, you are correct that Libtool is smart enough to look for the .la
file and use it instead of the output of `pkg-config --libs`. Thanks for
pointing this out, and I have committed r102 that sets the pkg-config Libs
variable to:
Libs: -L${libdir} -lpthread -lrt -lkqueue
Regards,
- Mark
[1] From pkg-config(1):
PKG_CHECK_MODULES(VARIABLE-PREFIX,MODULES[,ACTION-IF-FOUND,[ACTION-IF-
NOT-FOUND]])
The macro PKG_CHECK_MODULES can be used in configure.ac to check
whether modules exist. A typical usage would be:
PKG_CHECK_MODULES([MYSTUFF], [gtk+-2.0 >= 1.3.5 libxml = 1.8.4])
This would result in MYSTUFF_LIBS and MYSTUFF_CFLAGS substitu-
tion variables, set to the libs and cflags for the given module
list.
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