Re: compile problems (was Re: [libann-users] Where to download libann?)

[John Darrington]

On Fri, Feb 20, 2004 at 07:36:44PM +0100, Zbynek Winkler wrote:

     I am using cygwin and I am having some troubles compiling.
     
     'make demo' fails saying:
     g++ -c  -I /usr/local/include -I . -I . -I ./demos/common -I ./demos -I 
     demos -g demos/main.cc -o de
     mos/main.o
     demos/main.cc:40: error: syntax error before `/' token
     demos/main.cc: In function `int main(int, char**)':
     demos/main.cc:78: error: call of overloaded `log(int&)' is ambiguous
     /usr/include/math.h:58: error: candidates are: double log(double)
     /usr/include/c++/3.3.1/cmath:422: error:                 long double
       std::log(long double)
     /usr/include/c++/3.3.1/cmath:411: error:                 float 
     std::log(float)
     make: *** [demos/main.o] Error 1
     
     I do not understand the error since there is no 'log(int&)' call in the 
     main.cc file. It could be some macro magic though.

I suspect you're right, and cygwin has its own macro for log2.  So you
could try commenting out the definition of log2 in demos/main.cc

Also, #include <math.h> should in fact read #include <cmath> 

     
     I am also not able to create the documentation. What are the steps to do 
     so? Just 'make' in the 'doc' directory tells me
     make: *** No rule to make target `doc/libann.texinfo', needed by 
     `doc/libann.d'.  Stop.

libann uses a non-recursive make system so you need to build from the
root of the distribution tree.  Or you can do it manually.  But I
don't know if cygwin comes with texinfo by default.  You may have to
download it separately, Try texi2dvi doc/libann.texinfo  

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