gcc-4.0: gcc4 fails to compile working FLex 2.5.31

[Wim Delvaux]

Package: gcc-4.0
Version: 4.0.1-4ubuntu9
Severity: normal

When I compile (using configure) Flex 2.5.31 all is fine with version 3 of gcc.

However compiling with gcc4 builds a flex that produces errors from line 1 of the .x source file ...

AC.x:131: unknown error processing section 1


-- System Information:
Debian Release: testing/unstable
  APT prefers hoary-backports
  APT policy: (500, 'hoary-backports'), (500, 'breezy-updates'), (500, 'breezy-security'), (500, 'breezy')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-10-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages gcc-4.0 depends on:
ii  binutils                2.16.1-2ubuntu6  The GNU assembler, linker and bina
ii  cpp-4.0                 4.0.1-4ubuntu9   The GNU C preprocessor
ii  gcc-4.0-base            4.0.1-4ubuntu9   The GNU Compiler Collection (base 
ii  libc6                   2.3.5-1ubuntu12  GNU C Library: Shared libraries an
ii  libgcc1                 1:4.0.1-4ubuntu9 GCC support library

Versions of packages gcc-4.0 recommends:
ii  libc6-dev                2.3.5-1ubuntu12 GNU C Library: Development Librari
pn  libmudflap0-dev          <none>          (no description available)

-- no debconf information