[igraph] Trouble in igraph Installation from Source on Debian Testing amd64 architecture

[Lorenzo Isella]

Dear igraph users,
Some weeks ago I downloaded and installed from source the igraph
library on a box running Debian testing for the amd64 architecture.
Now, I think I have replicated the same steps on a new box (again
amd64 and Debian testing), but I am bumping into troubles.
Here is what I did:

sudo apt-get source igraph

$ sudo apt-get build-dep igraph
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

sudo apt-get -b source igraph

Then a lot of output till I get to the point:

[...]

 x86_64-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I.. -Wall -g -O2 -MT
libigraph_la-walktrap_heap.lo -MD -MP -MF
.deps/libigraph_la-walktrap_heap.Tpo -c walktrap_heap.cpp -o
libigraph_la-walktrap_heap.o >/dev/null 2>&1
mv -f .deps/libigraph_la-walktrap_heap.Tpo .deps/libigraph_la-walktrap_heap.Plo
/bin/sh ../libtool --tag=CXX   --mode=compile x86_64-linux-gnu-g++
-DHAVE_CONFIG_H -I. -I..    -Wall -g -O2 -MT
libigraph_la-walktrap_graph.lo -MD -MP -MF
.deps/libigraph_la-walktrap_graph.Tpo -c -o
libigraph_la-walktrap_graph.lo `test -f 'walktrap_graph.cpp' || echo
'./'`walktrap_graph.cpp
 x86_64-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I.. -Wall -g -O2 -MT
libigraph_la-walktrap_graph.lo -MD -MP -MF
.deps/libigraph_la-walktrap_graph.Tpo -c walktrap_graph.cpp  -fPIC
-DPIC -o .libs/libigraph_la-walktrap_graph.o
walktrap_graph.cpp: In member function 'long int Graph::memory()':
walktrap_graph.cpp:191: error: 'strlen' was not declared in this scope
make[4]: *** [libigraph_la-walktrap_graph.lo] Error 1
make[4]: Leaving directory `/home/lorenzo/internet-downloads/igraph-0.5/src'
make[3]: *** [all] Error 2
make[3]: Leaving directory `/home/lorenzo/internet-downloads/igraph-0.5/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/lorenzo/internet-downloads/igraph-0.5'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/lorenzo/internet-downloads/igraph-0.5'
make: *** [build-stamp] Error 2
dpkg-buildpackage: failure: debian/rules build gave error exit status 2
Build command 'cd igraph-0.5 && dpkg-buildpackage -b -uc' failed.
E: Child process failed


This sounds Greek to me...I do not what is failing, but it would seem
that the trouble is in the code to be compiled rather than in my box,
but I could be mistaken?
Anyone has any idea about what is going on?
Many thanks

Lorenzo