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Valued Contributor III

How to install and configure FFTW-3.3.3 that can be compiled by "nios2-linux-gcc"



I want to use fftw-3.3.3 in my nios2-uclinux , I install it follow "fftw installation user manual": 


(1)first, verify whether it works well on linux (centos-6.4) 


[root@localhost fftw-3.3.3]# ./configure 

[root@localhost fftw-3.3.3]# make 

[root@localhost fftw-3.3.3]# make install 


Edit the PATH: 


export path=$path: /root/opt/nios2/bin:/usr/local/bin 

export c_include_path=/usrlocal/include 

export library_path=/usr/local/lib 



After that, I write and compile a testfft.c: 


[root@localhost root]# gcc testfft.c -lm -lfftw3 -i/usr/local/bin 

[root@localhost root]# ./a.out 


--the output is correct! it can work on my linux:). 


(2) change to "nios2-linux-gcc" 


[root@localhost root]# nios2-linux-gcc -v 

--the version is 3.4.6, it's ok. 

[root@localhost fftw-3.3.3]# make clean 

--clean fftw pre-install 

[root@localhost fftw-3.3.3]# ./configure cc="nios2-linux-gcc" --host=nios2 

[root@localhost fftw-3.3.3]# make  

[root@localhost fftw-3.3.3]# make install 



then copy the "fftw3.f , fftw3.f03 , fftw3.h , fftw3l.f03 ,fftw3q.f03" from " /usr/local/include" folder to nios2 toolchain folder ".../nios2/include"  

copy the the "fftw-wisedom, fftw-wisdom-to-conf" from "/usr/local/bin" to nios2 toolchain ".../nios2/bin"folder. 

copy the "libfftw3.a," from "/usr/local/lib" to nios2 toolchain ".../nios2/lib" 


(3) compile testfft.c again: 


[root@localhost root]# nios2-linux-gcc testfft.c -lm -lfftw3 -i/usr/local/bin 


/root/opt/nios2/bin/../lib/gcc/nios2-linux-uclibc/3.4.6/../../../../nios2-linux-uclibc/lib/libfftw3.a(mapflags.o)(.text+0x49c): in function `fftw_mapflags': 

: undefined reference to `log' 

/root/opt/nios2/bin/../lib/gcc/nios2-linux-uclibc/3.4.6/../../../../nios2-linux-uclibc/lib/libfftw3.a(mapflags.o)(.text+0x4b8): in function `fftw_mapflags': 

: undefined reference to `log' 

/root/opt/nios2/bin/../lib/gcc/nios2-linux-uclibc/3.4.6/../../../../nios2-linux-uclibc/lib/libfftw3.a(trig.o)(.text+0xf0): in function `real_cexp': 

: undefined reference to `cos' 

/root/opt/nios2/bin/../lib/gcc/nios2-linux-uclibc/3.4.6/../../../../nios2-linux-uclibc/lib/libfftw3.a(trig.o)(.text+0x10c): in function `real_cexp': 

: undefined reference to `sin' 

collect2: ld returned 1 exit status 



--something is wrong, "nios2-linux-gcc" can't compile it .:confused: 


the nios2-linux is "nios2-linux-20090929.tar" 

the nios2gcc is "nios2gcc-20080203.tar.bz2" 


--the nios2-linux is ok, i have verified it on my fpga hardware. 


maybe the configuration is wrong, so would somebody give me some suggestions? 

thank you very much!
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