Problems building PHP/Mapscript on Redhat Enterprise 4

[Joshua Buysse]

I'm having some trouble getting PHP Mapscript to work correctly on RHEL
4.  I'm using the stock PHP, and some modified versions of the
mappinghacks.com SRPM packages.  I've tried 4.4.2, 4.6.0-beta1 and
4.6.0-beta2.  Some problem with all versions.

With an extremely simple example (hello.phtml from
http://www.mobilegeographics.com/mapserver/), it fails with both the
Apache DSO and the CGI versions of PHP.  Get a segfault from it, and at
a glance, it looks like php3_map_ms_new is passing bogus arguments to
mapObj_new.

I'm not a C programmer typically -- only in emergencies, and I've never
dealt with the PHP API.  Anybody have any ideas what's going on?
Here's the offending PHP code:

<?php
   $map_file="./hello.map";
   $map = ms_newMapObj($map_file);
?>

Here's the GDB output and backtrace:

(gdb) run hello.php
Starting program: /usr/bin/php hello.php
(no debugging symbols found)...(no debugging symbols found)...(no
debugging symbols found)...(no debugging symbols found)...(no debugging
symbols found)...[Thread debugging using libthread_db enabled]
[New Thread -1208023360 (LWP 21889)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208023360 (LWP 21889)]
0x01034b29 in msLoadMap (filename=0x927f214 "", new_mappath=0x0) at
mapfile.c:4178
4178      if((msyyin = fopen(filename,"r")) == NULL) {
(gdb) bt
#0  0x01034b29 in msLoadMap (filename=0x927f214 "", new_mappath=0x0) at
mapfile.c:4178
#1  0x0101175f in mapObj_new (filename=0x40080000 <Address 0x40080000
out of bounds>,
     new_path=0x927f214 "") at mapscript_i.c:100
#2  0x010061b6 in php3_ms_map_new (ht=0, return_value=0x927f1d4,
this_ptr=0x0, return_value_used=1)
     at php_mapscript.c:1729
#3  0x0815fdb6 in execute ()
#4  0x0814e909 in zend_execute_scripts ()
#5  0x0812410d in php_execute_script ()
#6  0x08168213 in main ()

Last, here's the configure line used (sorry about the excess -- RPM
adds a few things):
./configure --host=i686-redhat-linux-gnu --build=i686-redhat-linux-gnu
--target=i386-redhat-linux --program-prefix= --prefix=/usr
--exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
--sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include
--libdir=/usr/lib --libexecdir=/usr/libexec --localstatedir=/var
--sharedstatedir=/usr/com --mandir=/usr/share/man
--infodir=/usr/share/info --with-gd --with-gdal=/usr/bin/gdal-config
--with-ogr=/usr/bin/gdal-config --with-postgis=pg_config --with-geos
--with-proj --with-wcs --with-wfs --with-wfsclient --with-wmsclient
--with-curl-config=curl-config --with-php=/usr/include/php
--with-xpm=/usr/X11R6/lib --enable-debug
--with-php-regex-dir=/usr/include/php/regex

Thanks to anyone who's read this far.
--
Josh Buysse, System Administrator
CLA-OIT, Division of Research Computing Services
University of Minnesota

"Democracy should not be for export only."
   -- Jesse Jackson
   http://www.suntimes.com/output/jesse/cst-edt-jesse30.html