After compiling program that uses gsl a got linking errors:
./libs/statistics//libice_statistics.a(iceu_density_correl.o):iceu_density_correl.c:(.text+0xa4):
undefined reference to `_gsl_fft_complex_wavetable_free'
./libs/statistics//libice_statistics.a(iceu_density_correl.o):iceu_density_correl.c:(.text+0xbf):
undefined reference to `_gsl_fft_complex_workspace_free'
and so on.

-L/usr/lib -lgsl -lgslcblas -lm is mentioned in my command line to gcc.
Libraries are physically present in /usr/lib:
cd /usr/lib; ls libgsl*
libgsl.a  libgsl.dll.a  libgsl.la  libgslcblas.a  libgslcblas.dll.a
libgslcblas.la


Reinstallation of packages gsl* didnt help

information of "cygcheck -s" and "cygcheck -c" in attaches 'out' and
'out2' respectivetly
-- 
Kind regards,
Sergey Ivanov