<complex.h> for Cygwin?

Jan Chludzinski jan.chludzinski@gmail.com
Fri Oct 1 15:08:00 GMT 2010

I need to write some simple code which involves complex values.  I
remembered that C99 added support for complex values and tried to use
<complex.h> (different from C++'s <complex>) - I tried ccos() and got
the error below.

Another option is to use GLS?


On Thu, Sep 30, 2010 at 4:18 PM, Marco Atzeri <marco_atzeri@yahoo.it> wrote:
> --- Gio 30/9/10, Jan Chludzinski  ha scritto:
>> After doing some web searches for
>> <complex.h> and Cygwin, I found
>> there doesn't seem to be any support unless I use: gcc
>> -I/usr/include/mingw -lm tc.c  But I still end up with:
>> /cygdrive/c/DOCUME~1/JOHNC~1.ECS/LOCALS~1/Temp/ccAPGnIv.o:tc.c:(.text+0x3d):
>> undefined reference to `_ccos'
>> collect2: ld returned 1 exit status
>> I'm really not interested in working with MinGW either.
>>  All the
>> messages about <complex.h> and Cygwin are rather old
>> (<2007) so I was
>> hoping that 1.7 would remedy the problem.  Evidently not?
>> ---John
> John,
> newlib (cygwin libc-like library) has not the complex type,
> however on cygwin complex numbers are supported by
> the gcc/g++ compiler
> /usr/lib/gcc/i686-pc-cygwin/4.3.4/include/c++/complex.h
> what are exactly your needs ?
> Marco

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