Re: [igraph] Cygwin -> Windows compilation - again.

[Tamas Nepusz]

> Well, I guessed that you meant:
> ./configure CFLAGS=-mno-cygwin CXXFLAGS=-mno-cygwin
> make
Yes, sorry about that. (By the way, it's also fine if you write the  
variable assignments _before_ ./configure, these set the environment  
variables only for the next command, contrary to the usual case of  
"export CFLAGS=-mno-cygwin CXXFLAGS=-mno-cygwin" which set them for  
the lifetime of the shell).

> Unfortunately, I now get the following compilation error:
> [...]
> In file included from foreign-graphml.c:34:
> /usr/include/libxml2/libxml/encoding.h:28:19: iconv.h: No such file  
> or directory
Hmmm... I think Cygwin uses a different include and library path when  
you use -mno-cygwin and I guess that the iconv and libxml2 headers are  
installed only in the "main" include path but not in the directory  
used when compiling with -mno-cygwin. This might be because the  
libxml2 and iconv versions you have also depend on Cygwin's DLLs. You  
might try an alternative version of libxml2 and iconv (not the one  
shipped with Cygwin). I think these are the ones I used some time ago  
to compile igraph:

http://www.zlatkovic.com/libxml.en.html

Obviously you have to adjust the include and library paths  
accordingly; i.e., you can try:

./configure CFLAGS=-mno-cygwin CXXFLAGS=-mno-cygwin -I/cygdrive/c/ 
wherever/you/put/libxml2/include -L/cygdrive/c/wherever/you/put/ 
libxml2/lib

Alternatively, you can simply disable GraphML support in igraph which  
gets rid of the dependency on libxml2 and iconv:

./configure --disable-graphml CFLAGS=-mno-cygwin CXXFLAGS=-mno-cygwin

--
T.