[gnutls-dev] Guile problems in 1.7.12

Simon Josefsson simon at josefsson.org
Fri Jun 29 16:21:08 CEST 2007

ludo at gnu.org (Ludovic Courtès) writes:

> Hi,
> Simon Josefsson <simon at josefsson.org> writes:
>> ludo at chbouib.org (Ludovic Courtès) writes:
>>> Simon Josefsson <simon at josefsson.org> writes:
>>>> Still, the paths look right for me:
>>> I think I got it (I hope so!):
>>>   * On my machine, Guile is installed in `/usr/local/'.  Thus,
>>>     `GUILE_LDFLAGS' contain `-L /usr/local/lib', which leads Libtool to
>>>     add `/usr/local/lib' to RPATH.
>>>   * On your machine, Guile is installed in `/usr', so this does not
>>>     happen.  And a `-L /usr/local/lib' to your Libtool link command-line
>>>     and you'll make the same observations as I do.
>>> Unless I'm mistaken, the fix is to revert your `_LIBADD' patch and get
>>> back to something along the lines of:
>>>                    $(GUILE_LDFLAGS)
>>> which makes sure that third-party libs (here, Guile) appear last.
>> I didn't reply to this mail.  Is this still a problem for you?  I think
>> it is more correct to use LIBADD rather than LDFLAGS here, so I'd like
>> to debug why that doesn't work (and possibly report it as a bug) before
>> making a change.
> Well, I had forgotten about it too, but that's still valid.  ;-)
> To sum up: on my machine, Guile is installed in `/usr/local/lib', and so
> is GnuTLS.  The libtool link command-line looks like:
>   -L/usr/local/lib -lguile  ...  ../../lib/libgnutls.la  ... \
>   -o libguile-gnutls.la
> The first `-L' leads libtool to add `/usr/local/lib' to the RPATH of
> `libguile-gnutls.so'; the `../../lib/libgnutls.la' that follows leads
> libtool to *append* `../../lib/.libs' to the RPATH.  Consequently, the
> `libgnutls.so' and `libguile-gnutls.so' that are picked up at run-time
> are those from `/usr/local/lib', *not* the freshly-built ones.
> The proposed fix (above) fixes the problem.  That the `XXX_LIBS' vars
> would better fit in `XXX_LIBADD' than in `XXX_LDFLAGS' really isn't an
> issue: there's nothing in the libtool manual that forbids listing
> libtool archives as part of LDFLAGS.
> Is that clearer?

Thanks.  I've now built installed guile-1.8.1 locally and was able to
reproduce the problem.

I re-read the automake manual on this, and it says:

     Extra objects can be added to a _library_ using the `_LIBADD'
     variable.  For instance, this should be used for objects
     determined by `configure' (*note A Library::).

     In the case of libtool libraries, `maude_LIBADD' can also refer to
     other libtool libraries.

     Extra objects (`*.$(OBJEXT)') and libraries (`*.a', `*.la') can be
     added to a _program_ by listing them in the `_LDADD' variable.
     For instance, this should be used for objects determined by
     `configure' (*note Linking::).

     `_LDADD' and `_LIBADD' are inappropriate for passing
     program-specific linker flags (except for `-l', `-L', `-dlopen'
     and `-dlpreopen').  Use the `_LDFLAGS' variable for this purpose.

     For instance, if your `configure.ac' uses `AC_PATH_XTRA', you
     could link your program against the X libraries like so:

          maude_LDADD = $(X_PRE_LIBS) $(X_LIBS) $(X_EXTRA_LIBS)

     We recommend that you use `-l' and `-L' only when referring to
     third-party libraries, and give the explicit file names of any
     library built by your package.  Doing so will ensure that
     `maude_DEPENDENCIES' (see below) is correctly defined by default.

This suggests to me that we shouldn't use LDFLAGS at all for any -lguile
-L/usr/local/lib stuff, and I installed the following patch.

Does this work for you?


commit 1020d967f04532f5f39f2d4906b1f1d7893c58e1
Author: Simon Josefsson <simon at josefsson.org>
Date:   Fri Jun 29 16:16:24 2007 +0200

    Reported by ludo at gnu.org (Ludovic Courtès).

diff --git a/guile/src/Makefile.am b/guile/src/Makefile.am
index 7db4bec..daaab28 100644
--- a/guile/src/Makefile.am
+++ b/guile/src/Makefile.am
@@ -46,18 +46,17 @@ GNULIB_CFLAGS  = -I$(top_builddir)/lgl -I$(top_srcdir)/lgl
 libguile_gnutls_v_0_la_SOURCES = core.c errors.c utils.c
 libguile_gnutls_v_0_la_CFLAGS =			\
-libguile_gnutls_v_0_la_LDFLAGS = $(GUILE_LDFLAGS)
-libguile_gnutls_v_0_la_LIBADD =			\
+libguile_gnutls_v_0_la_LIBADD = \
 libguile_gnutls_extra_v_0_la_SOURCES = extra.c
 libguile_gnutls_extra_v_0_la_CFLAGS =		\
-libguile_gnutls_extra_v_0_la_LDFLAGS = $(GUILE_LDFLAGS)
 libguile_gnutls_extra_v_0_la_LIBADD =		\
   $(builddir)/libguile-gnutls-v-0.la		\
 AM_CPPFLAGS = -I$(top_builddir) -I$(builddir)

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