🚀 go-pugleaf

: To refresh your memory, here is what Tom said:

: >  Here is a list of the flags/compilers I have tried on RS/6000's:
: >
: >        CFLAGS= -O2 -funroll-loops  # Breaks with gcc-2.3.3, AIX-3.2.2
: >        CFLAGS= -O -qchars=signed # Seems to work for cc on RS/6000 AIX-3.2.2
: >        CFLAGS= -O2 # Fails with gcc-2.3.3 on AIX-3.2.2
: >        CFLAGS=  # Seems to work with gcc-2.3.3 on AIX-3.2.2, and cc.
: >        CFLAGS= -O # seems to work with gcc-2.3.3 on AIX-3.2.2, and cc.
: >        CFLAGS = -funroll-loops # Seems to work with gcc-2.3.3 on AIX-3.2.2
: >        CFLAGS = -O -funroll-loops # fails with gcc-2.3.3 on AIX-3.2.2
: >
: >  I personally use the "CFLAGS = -O" option

: Also, Chua Kong Sian said:

: > Well, I do have gnuchess on AIX v 3.2 (?) working fine.  Using the resident
: > cc compiler, I have the flags as
: > 
: > CFLAGS = -O3 -D_POSIX_SOURCE

: Note that Kong Sian was NOT using gcc.  You have to fix a small bug in
: gnuchess.h to compile gnuchess without gcc.  Use the following patch:

: iff -c gnuchess.h.~1~ gnuchess.h 
: *** gnuchess.h.~1~      Tue Jun 22 06:49:33 1993
: --- gnuchess.h  Wed Sep 15 11:22:27 1993
: ***************
: *** 27,33 ****
:   
:   #ifndef __GNUC__
:   #define inline
: ! #else
:   #define huge
:   #endif
:   
: --- 27,35 ----
:   
:   #ifndef __GNUC__
:   #define inline
: ! #endif
: ! 
: ! #ifndef MSDOS
:   #define huge
:   #endif


: 	--Tim

Just to add to this, I have tried using gcc with -O2 -funroll-loops.
This does not work (gcc 2.4.5).  -O -funroll-loops does work, but of
course you lose that performance, almost double.  In the end, I decided
to simply use the resident cc compiler with flags -O2 -D_POSIX_SOURCE
-Dhuge= .  I have not encountered any illegal moves with these flags.
Well, I've not play gnuchess vs gnuchess, but I did run quite a number
of gnuan analysis and it has not given any errors so far.

Kong Sian
kongsian@nsrc.nus.sg