I'm trying to upgrade from 5.09 (which built without problem) to
5.10.1.  The build dies almost immediately:

    CONFIGURATION DECISION: Using single-precision floating point for audio samples.
    Checking for C header file stdio.h... no
     *** Failed to compile a simple test program. The compiler is
     *** possibly not set up correctly, or is used with invalid flags.
     *** Check config.log to find out more about the error.

In config.log:

    scons: Configure: Checking for C header file stdio.h...
    .sconf_temp/conftest_0.c <-
      |
      |#include <stdio.h>
      |
      |
    gcc -o .sconf_temp/conftest_0.o -c -DGNU_GETTEXT -g -fomit-frame-pointer -freorder-blocks - D L I N U X - D P I P E S -DBETA -DHAVE_SOCKETS -I. -IH -I/usr/include/fltk-1.1 -I/usr/local/include -I/usr/include -I/usr/include -I/usr/X11R6/include .sconf_temp/conftest_0.c
    gcc: D: No such file or directory
    gcc: L: No such file or directory
    gcc: I: No such file or directory
    gcc: N: No such file or directory
    gcc: U: No such file or directory
    gcc: X: No such file or directory
    gcc: D: No such file or directory
    gcc: P: No such file or directory
    gcc: I: No such file or directory
    gcc: P: No such file or directory
    gcc: E: No such file or directory
    gcc: S: No such file or directory
    gcc: cannot specify -o with -c or -S with multiple files
    scons: Configure: no

Where are those insane "- D L I N U X - D P I P E S" arguments coming
from?

The system is GNU/Linux, gcc 4.1.2, glibc 2.5.1.

Regards,

Jeremy Henty