Re: pthread + SUN Compiler

[Bob Friesenhahn]

On Tue, 16 Feb 2010, address@hidden wrote:

> I wrote a configure.ac (below), use autoreconf --install
>
> Everything runs fine if I use
> CC=gcc CFLAGS="" LDFLAGS="" ./configure
>
> But if I use
> CC=suncc CFLAGS="" LDFLAGS="" ./configure
>
> I get a linking problem.
>
> /bin/bash ../../../libtool --tag=CC   --mode=link suncc -O3 -UPASSIVE -DFFTW
> -mt    -o cyto.run cyto_main.o cyto_allocation.o cyto_initialisation.o
> cyto_boundary_conditions.o cyto_initial_condition.o cyto_output.o
> cyto_equation.o cyto_laplace.o cyto_parallel_derivates.o
> ../../../common/libutils.a  -lpthread  -L/usr/lib -lmfhdf -ldf -ljpeg -lz -
> L/usr/lib -lmpi -L/usr/lib -lfftw3
> libtool: link: suncc -O3 -UPASSIVE -DFFTW -mt -o cyto.run cyto_main.o
> cyto_allocation.o cyto_initialisation.o cyto_boundary_conditions.o
> cyto_initial_condition.o cyto_output.o cyto_equation.o cyto_laplace.o
> cyto_parallel_derivates.o  ../../../common/libutils.a -L/usr/lib -lmfhdf -ldf
> /usr/lib/libjpeg.so -lz -lmpi /usr/lib/libfftw3.so -pthread -mt
>
>
> I can't figure out where the pthread is come from.

If it is not hard-coded in the configure script, then the most likely 
place it comes from is a library used in your link which uses threads, 
but which was built with GCC rather than the Sun compiler.  Libtool 
stores the -pthread option in the installed .la file.  The .la files 
are just ASCII text so you can easily inspect their content.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/