Re: How to check the size of pthread_t?

[Ralf Wildenhues]

Hello Vasil,

* Vasil Dimov wrote on Fri, Feb 27, 2009 at 07:47:49AM CET:
> 
> I am trying to create an autoconf script that does check the size of 
> pthread_t,
> but I am experiencing some troubles in the way.
> 
> To be precise, what I need is a macro like SIZEOF_PTHREAD_T, similar to
> SIZEOF_LONG. The problem is that pthread.h must be included in the test 
> program
> and it must be linked with the OS-dependent -pthread or -lpthread or
> whatever flag
> the OS is using to link against the POSIX threads library.
> 
> Can anyone send me a quick snippet of autoconf magic how to achieve this?

Completely untested: grab the ACX_PTHREAD macro from the Autoconf Macro
Archive, then use something like this:

  ACX_PTHREAD
  LIBS="$PTHREAD_LIBS $LIBS"
  CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
  CC="$PTHREAD_CC"
  AC_CHECK_SIZEOF([pthread_t], [],
    [AC_INCLUDES_DEFAULT
    #include <pthread.h>
    ])

If you don't want LIBS, CFLAGS, and CC mangled, then save and restore
their values before resp. afterwards.

Hope that helps (otherwise please report back).

Cheers,
Ralf