Hello, I compiled Olena 0.9 on Intel P4 RedHat Fedora with gcc 3.3.2 compiler. But I encountered the following errors when running make check. Before I compiled Olena I installed fftw-2.1.5 and both libraries librfftw.a and libfftw.a are located in /usr/local/directory. I did not disabled fft option when configuring Olena build. I appreciate your attention. Michal g++ -O3 -finline-limit-1500 -Wall -pedantic -Werror -lz -o multiple_sources -lz -lfftw -lrfftw multiple_sources-multiple_sources_1.o multiple_sources-multiple_sources_2.o ../check/libolncheck.a multiple_sources-multiple_sources_1.o(.text+0xab1): In function `first_check()':: undefined reference to `rfftw2d_create_plan' multiple_sources-multiple_sources_1.o(.text+0xb07): In function `first_check()':: undefined reference to `rfftw2d_create_plan' multiple_sources-multiple_sources_1.o(.text+0xbd0): In function `first_check()':: undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_1.o(.text+0xbdc): In function `first_check()':: undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_1.o(.text+0x13ad): In function `first_check()': : undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_1.o(.text+0x13b6): In function `first_check()': : undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_2.o(.text+0xab1): In function `second_check()': : undefined reference to `rfftw2d_create_plan' multiple_sources-multiple_sources_2.o(.text+0xb07): In function `second_check()': : undefined reference to `rfftw2d_create_plan' multiple_sources-multiple_sources_2.o(.text+0xbd0): In function `second_check()': : undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_2.o(.text+0xbdc): In function `second_check()': : undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_2.o(.text+0x13ad): In function `second_check()': : undefined reference to `fftwnd_destroy_plan' multiple_sources-multiple_sources_2.o(.text+0x13b6): In function `second_check()': : undefined reference to `fftwnd_destroy_plan'