I've compiled this code on several machines aready with the same configuration of Redhat 5.x,
Apache 1.3.3, Postgres 6.3.2, and PHP 3.0.5 and now, while trying to update yet another machine,
I get a compile error, where before I only got compiler warnings concerning "palloc".   The Postgres
include files define a "palloc" and Apache define "palloc".  

Without looking at the mod_php3.c code in detail, it is unclear which version of palloc is the correct
one to use (Postgres: #define palloc malloc  OR  Apache: #define palloc ap_palloc). 


System :

Red Hat Linux release 5.0 (Hurricane)
Kernel 2.0.35 on an i586


Compiler:

[root@kerberos src]# gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.7.2.3/specs
gcc version 2.7.2.3


My configuration for PHP :

./configure \
--with-shared-apache=../apache_1.3.3 \
--with-pgsql=/usr/local/pgsql \
--enable-debug=no \
--enable-track-vars=yes \
--enable-bcmath=yes


Build error :
...
gcc -g -O2 -O2 -fpic  -I. -I.   -I../apache_1.3.3/src/include -I../apache_1.3.3/src/os/unix          -I/usr/local/pgsql/include            -c internal_functions.c -o internal_functions.o
In file included from functions/php3_pgsql.h:46,
                 from internal_functions.c:62:
/usr/local/pgsql/include/libpq-fe.h:349: warning: `palloc' redefined
../apache_1.3.3/src/include/ap_compat.h:232: warning: this is the location of the previous definition
In file included from internal_functions.c:70:
functions/php3_gd.h:44: gd.h: No such file or directory
make: *** [internal_functions.o] Error 1
[root@kerberos php-3.0.5]#