bison -d option generates sparse .h files

[Hal Brodigan]

I've noticed that when creating bison files with C code in the Prologue 
section that this code does not show up in the generated .h files when 
using "bison -d". This is especially annoying when one is trying to 
override the default definitions of bison, such as YYSTYPE. If one 
redefines YYSTYPE, the redefinition will not be included in the 
generated .h file and any other code that expects the new definition to 
be there, such as a flex file, will not find it. I've noticed that this 
bug is well known and Google searches reveal emails on the subject. I've 
already submitted a bug report to my distribution of choice, Gentoo, and 
the Gentoo devs could not render a patch or work-around to resolve the 
issue. So here I am, asking the upstream devs for help. Also the Gentoo 
devs would like me to relay any resolving patches they're way in order 
to benefit the users.

Here is the link to the versions of bison supplied by Gentoo. I have 
already tested versions 1.875d, 2.0 and 2.1, all contain the described bug.
http://packages.gentoo.org/search/?sstring=bison

Also if it's of any help here is my "emerge info" output.

Gentoo Base System version 1.6.13
Portage 2.0.51.22-r3 (default-linux/amd64/2005.0, gcc-3.4.4, 
glibc-2.3.5-r2, 2.6.12-gentoo-r10 x86_64)
=================================================================
System uname: 2.6.12-gentoo-r10 x86_64 AMD Athlon(tm) 64 Processor 3400+
dev-lang/python:     2.3.5-r2
sys-apps/sandbox:    1.2.12
sys-devel/autoconf:  2.13, 2.59-r6
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1
sys-devel/binutils:  2.15.92.0.2-r10
sys-devel/libtool:   1.5.18-r1
virtual/os-headers:  2.6.11-r2
ACCEPT_KEYWORDS="amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-pipe -O3 -march=k8"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config 
/usr/lib/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-pipe -O3 -march=k8"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="http://distfiles.gentoo.org 
http://distro.ibiblio.org/pub/Linux/distributions/gentoo";
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="amd64 X aac alsa avi berkdb bitmap-fonts cdr crypt curl dvd dvdread 
eds emboss encode esd fam flac foomaticdb fortran gif gnome gpm 
gstreamer gtk gtk2 imlib ipv6 jpeg libvisual lzw lzw-tiff mp3 mpeg 
ncurses network nls ogg oggvorbis opengl pam pdflib perl png python 
quicktime readline samba sdl softmmu speex spell sqlite ssl tcpd theora 
tiff truetype-fonts type1-fonts usb userlocales vorbis xine xml2 xpm xv 
zlib userland_GNU kernel_linux elibc_glibc"
Unset:  ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS

Hal Brodigan