Bugzilla Bug 149153

scipy-0.5.1 from the main tree fails on amd64:
--------------------------------
/usr/bin/gfortran -Wall -shared
build/temp.linux-x86_64-2.4/build/src.linux-x86_64-2.4/Lib/fftpack/convolvemodule.o
build/temp.linux-x86_64-2.4/Lib/fftpack/src/convolve.o
build/temp.linux-x86_64-2.4/build/src.linux-x86_64-2.4/fortranobject.o
-L/usr/lib -Lbuild/temp.linux-x86_64-2.4 -ldfftpack -lfftw3 -lgfortran -o
build/lib.linux-x86_64-2.4/scipy/fftpack/convolve.so
/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.1/../../../../x86_64-pc-linux-gnu/bin/ld:
build/temp.linux-x86_64-2.4/libdfftpack.a(dfftb.o): relocation R_X86_64_32
against `a local symbol' can not be used when making a shared object; recompile
with -fPIC
build/temp.linux-x86_64-2.4/libdfftpack.a: could not read symbols: Bad value
collect2: ld returned 1 exit status
--------------------------

It looks like it is a PIC problem. Probably caused by the temporary LDFLAGS
removal.
In the gentooscience.org overlay, I added an export F77FLAGS="${CFLAGS} -fPIC"
after the "unset LDFLAGS". Not so nice, but works.

I really hate it when people insist on linking static libraries into shared
libraries.

This is now fixed in 0.5.2 as well as numpy 1.0.1.