sub-project link problem

["Lars J. Aas" <larsa at sim dot no>]

  Hi,

After building a C++ library (autoconf/automake/libtool setup), the build
process continues in a sub-project (a subdir with it's own configure setup)
to build some example programs using the libraryš.  This is done with this
line:
  AC_CONFIG_SUBDIRS(examples)

The example programs are also C++, and compile without any problem.
The examples/configure.in has got the following two lines at the top:
  AC_PROG_CXX
  AC_LANG_CPLUSPLUS

The problem is that when it's time to link against the C++ library in
the parent project, a C linker is chosen, which fails on a lot of
platforms (IRIX is one of them).  For Linux, gcc handles it so it took
some time before we noticed the problem.

Does anyone know why $(LINK) is chosen instead of $(CXXLINK) in the
subproject, even though it's a C++ project, using the C++ compiler while
compiling the objects?

  Lars J
--
[1]  For those interested in the code, the projects are the GUI toolkit
libraries for Coin, an Open Inventor implementation.
  cvs -d :pserver:cvs@cvs.sim.no:/export/cvsroot login (password: cvs)
  cvs -d :pserver:cvs@cvs.sim.no:/export/cvsroot co simage
  cvs -d :pserver:cvs@cvs.sim.no:/export/cvsroot co Coin
  cvs -d :pserver:cvs@cvs.sim.no:/export/cvsroot co SoQt
                                                (or SoXt if you don't have Qt)