[Ecls-list] --enable-local-boehm

[Juan Jose Garcia-Ripoll]

Hi,

I have incorporated Hannu Koivisto's patches for building ECL with an
already installed copy of the Boehm collector. This implies a new flag
--enable-local-boehm that mostly tells ECL not to build the collector
but to assume that both libraries and headers are in suitable places
(You might need to pass CFLAGS and LDFLAGS to configure so that GCC can
find the libraries or headers)

I have also fixed the way headers are grabbed from these two packages.
Now the build process consists on these steps

1) Build GMP and install headers into build/h, and libraries into build/
2) Build BWGC and install headers into build/h and libraries into build/
3) Build ecl_min and link it against libgmp and libgc
4) Build ecl

The installation process copies the libraries (if any) and the headers
(if any) into the same places as before. The novelty is that now less
headers are installed (only gc.h for the collector, a few others for
GMP)

Juanjo