[Libguestfs] [PATCH] lib: Add thread-safety to global list of handles.

[Jim Meyering]

Richard W.M. Jones wrote:
> Subject: [PATCH] lib: Add thread-safety to global list of handles.
>
> This commit uses the Gnulib 'lock' module to implement a mutex on
> the global list of handles which is stored by the library.
>
> Note that Gnulib nicely avoids explicitly linking with -lpthread
> unless the application program itself links to -lpthread.  Locks
> are only enabled in multithreaded applications.
>
> $ ldd src/.libs/libguestfs.so.0.217.0
> 	linux-vdso.so.1 =>  (0x00007fffcb7ff000)
> 	libc.so.6 => /lib64/libc.so.6 (0x00007f96a4e6c000)
> 	/lib64/ld-linux-x86-64.so.2 (0x00007f96a544d000)
>
> Please enter the commit message for your changes. Lines starting
> ---
>  bootstrap     |    1 +
>  m4/.gitignore |    2 ++
>  src/guestfs.c |   19 ++++++++++---------

Hi Rich,
That change looks fine.
However, don't you want to link with $(LIBTHREAD)?

This is from gnulib/modules/lock:

    Link:
    $(LTLIBTHREAD) when linking with libtool, $(LIBTHREAD) otherwise

which should imply you see that advice when running gnulib-tool
(albeit along with hundreds of other less-important lines)