Roberto Bagnara wrote:

Dear Sir,

I have downloaded Giac 0.4.0 from

ftp://ftp-fourier.ujf-grenoble.fr/xcas/giac_unstable.tgz

and tried to compile it with GCC 3.4.0. The compilation aborts very soon as follows:

... c++ -DHAVE_CONFIG_H -I. -I. -I.. -I. -I.. -g -O2 -c gausspol.cc -fPIC -DPIC -o .libs/gausspol.lo In file included from poly.h:26, from sym2poly.h:23, from sym2poly.cc:32: monomial.h: In function `giac::monomial<T> giac::Untrunc1(const T&, int)': monomial.h:151: error: insufficient contextual information to determine type monomial.h:151: error: base operand of `->' is not a pointer monomial.h:302: confused by earlier errors, bailing out In file included from poly.h:26, from gausspol.h:22, from gausspol.cc:28: monomial.h: In function `giac::monomial<T> giac::Untrunc1(const T&, int)': monomial.h:151: error: insufficient contextual information to determine type monomial.h:151: error: base operand of `->' is not a pointer monomial.h:302: confused by earlier errors, bailing out make[2]: *** [sym2poly.lo] Error 1 make[2]: *** Waiting for unfinished jobs.... make[2]: *** [gausspol.lo] Error 1 make[2]: Leaving directory `/usr/local/distrib/giac-0.4.0/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/local/distrib/giac-0.4.0' make: *** [all-recursive-am] Error 2

I am unsure about whether this is an indication that Giac 0.4.0 uses some non-standard C++ features that are now rejected by g++ or if we are presented with a bug in g++. What do you think?

Hello!

First I'm not a C++ expert, therefore I might be wrong, but I don't see anything non-standard inside my code (at least there). Since it compiles with gcc 2.95 to gcc 3.3, either it's a gcc bug or it should be possible to find what's wrong by looking at the gcc Changelog. I'll probably try to compile with gcc 3.4 in the next few days and I'll keep you informed.

Bernard Parisse