Re: [fuse-devel] Re: FBSD linking problems: -lpthread vs. -pthread

[Terrence C. <ter...@tr...>]

Csaba Henk wrote:
> On 2006-05-29, Terrence Cole <ter...@tr...> wrote:
>> Csaba Henk wrote:
>>> On 2006-05-28, Terrence Cole <ter...@tr...> wrote:
>> A very good question.  From what I can glean in `man gcc`, -pthread is 
>> ...
>> Thanks for prompting me to look all this up; I've been meaning to figure 
>> out the semantic differences on this issue for awhile. :-)
> 
> Thank you for looking it up.
> 
> Miklos, what do you think about this patch?
> 
> One more weirdness can be seen related to pkg-config (for which you
> didn't do the adjustments). What seemed logical to me is the following
> for fuse.pc.in:

Whoops.

> ---------------------------------------------
> prefix=@prefix@
> exec_prefix=@exec_prefix@
> libdir=@libdir@
> includedir=@includedir@
> pthread_cflags=@PTHREAD_CFLAGS@
> pthread_libs=@PTHREAD_LIBS@
> 
> Name: fuse
> Description: Filesystem in Userspace
> Version: @VERSION@
> Libs: -L${libdir} -lfuse ${pthread_libs}
> Cflags: -I${includedir}/fuse -D_FILE_OFFSET_BITS=64 ${pthread_cflags}
> ---------------------------------------------
> 
> However, it's not good. (Eg. on FreeBSD, PTHREAD_CFLAGS will be set to
> "-D_THREAD_SAFE -pthread", PTHREAD_LIBS to "", and then, sshfs
> compilation fails at the final linking stage.)
> 
> What works indeed is 
> 
> ---------------------------------------------
> prefix=@prefix@
> exec_prefix=@exec_prefix@
> libdir=@libdir@
> includedir=@includedir@
> pthread_cflags=@PTHREAD_CFLAGS@
> 
> Name: fuse
> Description: Filesystem in Userspace
> Version: @VERSION@
> Libs: -L${libdir} -lfuse ${pthread_cflags}
> Cflags: -I${includedir}/fuse -D_FILE_OFFSET_BITS=64
> ---------------------------------------------
> 
> That is, it seems as if the toolchain would like to see the "-pthread"
> exactly at those places where you'd put "-lpthread", regardless the
> semantical difference between the two.

Found why this is.  From the documentation:

"NOTE: You are assumed to not only compile your program with these 
flags, but also link it with them as well. e.g. you should link with 
$PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS"

Looks like I borked the patch.  I'll fix this and resubmit it.

-Terrence

> Regards,
> Csaba
> 
>