Hello,
I've been having linking problems with a C++ project after an update to
more recent g++ versions (post-4.5). Here's an example, where the
building of an executable fails:
*************************************************************************
/bin/bash ../libtool --tag=CXX --mode=link g++ -I.. -g -O2 -lgsl
-lgslcblas -lm -o minga minga.o libminga.la
libtool: link: g++ -I.. -g -O2 -o .libs/minga minga.o -lgsl -lgslcblas
-lm ./.libs/libminga.so
./.libs/libminga.so: undefined reference to `gsl_rng_uniform_int'
./.libs/libminga.so: undefined reference to `gsl_rng_uniform'
collect2: ld returned 1 exit status
*************************************************************************
The linking problem does not occur if the order of arguments called by
g++ is altered to
g++ -I.. -g -O2 -o .libs/minga minga.o ./.libs/libminga.so -lgsl
-lgslcblas -lm
... but the call to g++ is autogenerated by the autotools, and I don't
know if/how I can ask for the order of arguments to be re-ordered.
A workaround I have found is to add a line to configure.ac,
CXXFLAGS="$CXXFLAGS -Wl,--no-as-needed"
... but I'd like to know if there is any more elegant solution to this
problem from an autoconf/autotools point of view.
Can anyone advise?
Thanks and best wishes,
-- Joe
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