Configure fails to spot fftw3 lib on macosx 10.5

ROOT
1

Dear all.
I am trying to install fftw support on latest root (5.30).
I have installes the fftw3 libs manually AND trough fink.
I have the libs under
/sw/lib
and in a local package
/usr/local/lib
but when I run configure (either with or without specifing
–with-fftw3-libdir=/sw/lib --with-fftw3-incdir=/sw/include
or
–with-fftw3-libdir=/usr/local/lib --with-fftw3-incdir=/usr/local/include
the result is alwyas:
Checking for fftw3.h … /sw/include
Checking for libfftw3, or libfftw3-3 … no

so… the .h is found BUT not the lib!

Of course I checked that the libs are there( see below).

Any advice?
Alessio

[21:42:29][asarti@kagome:/Users/Shared/Packages/root]$l /sw/lib/fftw3
-rw-r–r-- 1 root admin 28288 24 Lug 16:34 /sw/lib/libfftw3_threads.a
-rwxr-xr-x 1 root admin 29356 24 Lug 16:34 /sw/lib/libfftw3_threads.3.dylib
-rw-r–r-- 1 root admin 1632800 24 Lug 16:34 /sw/lib/libfftw3.a
-rwxr-xr-x 1 root admin 1145600 24 Lug 16:34 /sw/lib/libfftw3.3.dylib
-rw-r–r-- 1 root admin 28424 24 Lug 16:36 /sw/lib/libfftw3f_threads.a
-rwxr-xr-x 1 root admin 29404 24 Lug 16:36 /sw/lib/libfftw3f_threads.3.dylib
-rw-r–r-- 1 root admin 1592472 24 Lug 16:36 /sw/lib/libfftw3f.a
-rwxr-xr-x 1 root admin 1113364 24 Lug 16:36 /sw/lib/libfftw3f.3.dylib
lrwxr-xr-x 1 root admin 25 24 Lug 16:36 /sw/lib/libfftw3f_threads.dylib -> libfftw3f_threads.3.dylib
lrwxr-xr-x 1 root admin 17 24 Lug 16:36 /sw/lib/libfftw3f.dylib -> libfftw3f.3.dylib
lrwxr-xr-x 1 root admin 24 24 Lug 16:36 /sw/lib/libfftw3_threads.dylib -> libfftw3_threads.3.dylib
lrwxr-xr-x 1 root admin 16 24 Lug 16:36 /sw/lib/libfftw3.dylib -> libfftw3.3.dylib
-rwxr-xr-x 1 root admin 981 24 Lug 16:36 /sw/lib/libfftw3f_threads.la
-rwxr-xr-x 1 root admin 933 24 Lug 16:36 /sw/lib/libfftw3f.la
-rwxr-xr-x 1 root admin 975 24 Lug 16:36 /sw/lib/libfftw3_threads.la
-rwxr-xr-x 1 root admin 927 24 Lug 16:36 /sw/lib/libfftw3.la

2

Are you sure the Fink version is compatible with the architecture for which you configure? If macosx64 is used the library must be 64-bit.

Cheers, Fons.

3

Yeah. I have checked.
I am configuring with macosx…
./configure macosx --with-fftw3-libdir=/sw/lib --with-fftw3-incdir=/sw/include --enable-roofit

BUT what puzzle me most is the fact that the .h is found in /sw/include, while the lib is not found!

Checking for fftw3.h … /sw/include
Checking for libfftw3, or libfftw3-3 … no

alessio

4

The lib might not be found/accepted if it is not compatible with the chosen architecture. Otherwise put some

set -x

set +x

to see what goes on in your case. First time I see a problem with this so it must be something with your setup.

Cheers, Fons.

5

Hello,

I had the same problem on OS 10.6 64-bit and recently solved it.

In the config.log, I was getting the following error

Checking if /sw/lib/libfftw3.a contains compatible code
 file -L /sw/lib/libfftw3.a | grep 'x86_64'
 result: 0

Checking manually, the command was telling me

$ file -L libfftw3.a libfftw3.a: current ar archive random library

But using otool or lipo

$ lipo -info libfftw3.a
input file libfftw3.a is not a fat file
Non-fat file: libfftw3.a is architecture: x86_64

$ otool -hv libfftw3.a
Archive : libfftw3.a
libfftw3.a(align.o):
Mach header
      magic cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
MH_MAGIC_64  X86_64        ALL  0x00      OBJECT     3        336 SUBSECTIONS_VIA_SYMBOLS

I modified the configure file so he could check the architecture using the lipo command and recompiled root.
Everything is working for me, now.

Hope, it’ll help you.

Cheers

6

Hi,

this test was already added in the trunk (but using “ar x|file” for .a’s). I’ve now changed to lipo -info as per your suggestion.

Cheers, Fons.