[Pkg-scicomp-devel] Bug#456046: FTBFS with GCC 4.3: missing #includes

[Martin Michlmayr]

Package: orsa
Version: 0.7.0-10
Usertags: ftbfs-gcc-4.3

Your package fails to build with GCC 4.3.  Version 4.3 has not been
released yet but I'm building with a snapshot in order to find errors
and give people an advance warning.  In GCC 4.3, the C++ header
dependencies have been cleaned up.  The advantage of this is that
programs will compile faster.  The downside is that you actually
need to directly #include everything you use (but you really should
do this anyway, otherwise your program won't work with any compiler
other than GCC).  There's some more information about this at
http://www.cyrius.com/journal/2007/05/10#gcc-4.3-include

You can reproduce this problem with gcc-snapshot from unstable.  Note
that Red Hat, Novell and Ubuntu have done some work getting packages
to build with GCC 4.3 so there might be patches floating around
somewhere.  I suggest you talk to your upstream.

> Automatic build of orsa_0.7.0-10 on em64t by sbuild/amd64 0.53
...
> /bin/sh ../../libtool --tag=CXX --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I../../src -I./misc -I./..  -DQT_THREAD_SUPPORT  -D_REENTRANT  -g -Wall -W -pipe -ftemplate-depth-64 -O3 -fno-exceptions -funroll-loops -fstrict-aliasing -fno-gcse -I/usr/include    -c -o orsa_interaction_tree.lo orsa_interaction_tree.cc
>  g++ -DHAVE_CONFIG_H -I. -I. -I../../src -I./misc -I./.. -DQT_THREAD_SUPPORT -D_REENTRANT -g -Wall -W -pipe -ftemplate-depth-64 -O3 -fno-exceptions -funroll-loops -fstrict-aliasing -fno-gcse -I/usr/include -c orsa_interaction_tree.cc  -fPIC -DPIC -o .libs/orsa_interaction_tree.o
> orsa_interaction_tree.cc: In function 'orsa::Vector orsa::ComputeAcceleration(std::_List_const_iterator<orsa::Body>, std::_List_const_iterator<orsa::TreeNode>, bool)':
> orsa_interaction_tree.cc:131: error: 'memcpy' was not declared in this scope
> orsa_interaction_tree.cc: In member function 'double* orsa::TreeNode::node_quadrupole() const':
> orsa_interaction_tree.cc:202: error: 'memcpy' was not declared in this scope
> make[5]: *** [orsa_interaction_tree.lo] Error 1
> make[5]: Leaving directory `/build/tbm/orsa-0.7.0/src/liborsa'

-- 
Martin Michlmayr
http://www.cyrius.com/