Re: How do I get libtool to use g++?
Neil Roeth <email@example.com> writes:
> I recently had a bug (193950) filed against one of my packages because the
> shared libraries had "undefined non-weak symbols" - libstdc++ was not being
> linked in. I resolved it with what I consider a gruesome hack. I discovered
> that forcing libtool to use g++ while linking would automatically link in
> libstdc++. The hack came about because I could not figure out how to get
> libtool to use g++ instead of gcc. So, I did
> sed -e 's/CC="gcc"/CC="g++"/g' libtool > lt.tmp && mv -f lt.tmp libtool
> to force it. What's the right way to get libstdc++ linked in to shared
> libraries of C++ code? The package uses autoconf, automake, libtool, etc.
Would you care to show us your Makefile.am?
automake should be using CXX (and CXXFLAGS and AM_CXXFLAGS) to invoke
the C++ compiler, *not* CC/CFLAGS/AM_CFLAGS. It should pick the
correct compiler if you specifiy the sources properly:
bin_PROGRAMS = foo
foo_SOURCES = foo.cc
will work, but if you miss out the _SOURCES, it will imply foo.c as
being the source, since C is the default language.
Does configure.ac call the "AC_PROG_CXX" macro? Without it, automake
won't know anything about there being a C++ compiler available.
Whether you love or hate libtool, this is not a libtool problem. Are
you using libtool 1.5 yet?
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