Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for -lfftw3
Writing Makefile for Math::FFTW
cp lib/Math/FFTW.pm blib/lib/Math/FFTW.pm
/Users/cpanrun/build/5.10.0/bin/perl /Users/cpanrun/build/5.10.0/lib/ExtUtils/xsubpp  -typemap /Users/cpanrun/build/5.10.0/lib/ExtUtils/typemap  FFTW.xs > FFTW.xsc && mv FFTW.xsc FFTW.c
Please specify prototyping behavior for FFTW.xs (see perlxs manual)
gcc -c  -I. -fno-common -DPERL_DARWIN -no-cpp-precomp -arch ppc -arch i386 -nostdinc -B/Developer/SDKs/MacOSX10.4u.sdk/usr/include/gcc -B/Developer/SDKs/MacOSX10.4u.sdk/usr/lib/gcc -isystem/Developer/SDKs/MacOSX10.4u.sdk/usr/include -F/Developer/SDKs/MacOSX10.4u.sdk/System/Library/Frameworks -mmacosx-version-min=10.3 -DPRIVLIB_LAST_IN_INC -fno-strict-aliasing -pipe -O3   -DVERSION=\"0.01\" -DXS_VERSION=\"0.01\"  "-I/Users/cpanrun/build/5.10.0/lib/CORE"   FFTW.c
FFTW.xs:4:19: error: fftw3.h: No such file or directory
FFTW.xs: In function 'XS_Math__FFTW_fftw_dft_real2complex_1d':
FFTW.xs:14: error: 'fftw_complex' undeclared (first use in this function)
FFTW.xs:14: error: (Each undeclared identifier is reported only once
FFTW.xs:14: error: for each function it appears in.)
FFTW.xs:14: error: 'out' undeclared (first use in this function)
FFTW.xs:17: error: 'fftw_plan' undeclared (first use in this function)
FFTW.xs:17: error: parse error before 'p'
FFTW.xs:31: error: parse error before ')' token
FFTW.xs:35: error: 'p' undeclared (first use in this function)
FFTW.xs:35: error: 'FFTW_ESTIMATE' undeclared (first use in this function)
FFTW.xs: In function 'XS_Math__FFTW_fftw_idft_complex2real_1d':
FFTW.xs:60: error: 'fftw_complex' undeclared (first use in this function)
FFTW.xs:60: error: 'in' undeclared (first use in this function)
FFTW.xs:64: error: 'fftw_plan' undeclared (first use in this function)
FFTW.xs:64: error: parse error before 'p'
FFTW.xs:79: error: parse error before ')' token
FFTW.xs:85: error: 'p' undeclared (first use in this function)
FFTW.xs:85: error: 'FFTW_ESTIMATE' undeclared (first use in this function)
FFTW.xs:4:19: error: fftw3.h: No such file or directory
FFTW.xs: In function 'XS_Math__FFTW_fftw_dft_real2complex_1d':
FFTW.xs:14: error: 'fftw_complex' undeclared (first use in this function)
FFTW.xs:14: error: (Each undeclared identifier is reported only once
FFTW.xs:14: error: for each function it appears in.)
FFTW.xs:14: error: 'out' undeclared (first use in this function)
FFTW.xs:17: error: 'fftw_plan' undeclared (first use in this function)
FFTW.xs:17: error: parse error before 'p'
FFTW.xs:31: error: parse error before ')' token
FFTW.xs:35: error: 'p' undeclared (first use in this function)
FFTW.xs:35: error: 'FFTW_ESTIMATE' undeclared (first use in this function)
FFTW.xs: In function 'XS_Math__FFTW_fftw_idft_complex2real_1d':
FFTW.xs:60: error: 'fftw_complex' undeclared (first use in this function)
FFTW.xs:60: error: 'in' undeclared (first use in this function)
FFTW.xs:64: error: 'fftw_plan' undeclared (first use in this function)
FFTW.xs:64: error: parse error before 'p'
FFTW.xs:79: error: parse error before ')' token
FFTW.xs:85: error: 'p' undeclared (first use in this function)
FFTW.xs:85: error: 'FFTW_ESTIMATE' undeclared (first use in this function)
lipo: can't open input file: /var/tmp//ccZAMa1D.out (No such file or directory)
make: *** [FFTW.o] Error 1