Building gcc on X86_64

["Smith-Rowland, Edward M" <ESmith-rowland@alionscience.com>]

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I'm trying to bootstrap gcc on x86_64.

Here is my configure line:

../gcc/configure --prefix=/home/ed/bin-4.3 --enable-languages=c,c++,fortran --with-gmp-dir=/home/ed/gcc/gmp-4.2.1 --with-mpfr-dir=/home/ed/gcc/mpfr-2.2.0

I just unpacked the GMP and MPFR source directories in the gcc source tree.

My question is why does the configure check require the mpfr library to already be built when I put two source directories?  It seems like it should just check the headers.  Then it should configure and build those packages using the most useful flags for GCC.

Ed

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This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

configure:614: checking host system type
configure:635: checking target system type
configure:653: checking build system type
configure:708: checking for a BSD compatible install
configure:761: checking whether ln works
configure:785: checking whether ln -s works
configure:1850: checking for gcc
configure:1963: checking whether the C compiler (gcc  ) works
configure:1979: gcc -o conftest    conftest.c  1>&5
configure:2005: checking whether the C compiler (gcc  ) is a cross-compiler
configure:2010: checking whether we are using GNU C
configure:2019: gcc -E conftest.c
configure:2038: checking whether gcc accepts -g
configure:2105: checking for gnatbind
configure:2170: checking whether compiler driver understands Ada
configure:2202: checking how to compare bootstrapped objects
configure:2300: checking for correct version of gmp.h
configure:2313: gcc -c -g -O2 -I/home/ed/gcc/mpfr-2.2.0 -I/home/ed/gcc/gmp-4.2.1  conftest.c 1>&5
configure:2328: checking for correct version of mpfr.h
configure:2343: gcc -o conftest -g -O2 -I/home/ed/gcc/mpfr-2.2.0 -I/home/ed/gcc/gmp-4.2.1   conftest.c  /home/ed/gcc/mpfr-2.2.0/libmpfr.a 1>&5
gcc: /home/ed/gcc/mpfr-2.2.0/libmpfr.a: No such file or directory
configure: failed program was:
#line 2330 "configure"
#include "confdefs.h"
#include <gmp.h>
#include <mpfr.h>
int main() {

#if MPFR_VERSION_MAJOR < 2 || (MPFR_VERSION_MAJOR == 2 && MPFR_VERSION_MINOR < 2)
  choke me
#endif
  mpfr_t n; mpfr_init(n);

; return 0; }