[gentoo-ppc-user] gcc flags on iBook2

[Joao F. Serejo]

Hi all

Some time ago the freehacker.org gcc flags where been posted in topic and assumed to
be safe tu use. I have a gentoo distro all compiled for G3 powerBook instruction flag
as it follow:

   750 aka as G3 (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=750 -O3 -pipe -fsigned-char -mpowerpc-gfxopt"
CXXFLAGS="-mcpu=750 -O3 -pipe -fsigned-char -mpowerpc-gfxopt"

in the apple support there is no doubt about the processsor type, but the 'cat /dev/cpuinfo'
is not straight simple:

cpu		: 750FX
temperature 	: 31-33 C (uncalibrated)
clock		: 700MHz
revision	: 2.2 (pvr 7000 0202)
bogomips	: 1389.36
machine		: PowerBook4,3						<<<<<<<< here and
motherboard	: PowerBook4,3 MacRISC2 MacRISC Power Macintosh		<<<<<<<< here ..
board revision	: 00000000
detected as	: 257 (iBook 2 rev. 2)
pmac flags	: 0000000b
L2 cache	: 512K unified
memory		: 640MB
pmac-generation	: NewWorld


The issue is: 

The system is working great with this for a long time now! but some programs (FEW ONES)
give the 'unrecognized -03' WARNING during the build process...

Any chances that the strings above should be diferent?
The G4 use -02 as shown from the same source document:


[quote:]

   Note: do not use -march=
   Note: -O3 is unstable on G4

   7400, aka G4 (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7400 -O2 -pipe -fsigned-char -maltivec -mabi=altivec -mpowerpc-gfxopt"
CXXFLAGS="-mcpu=7400 -O2 -pipe -fsigned-char -maltivec -mabi=altivec -mpowerpc-gfxopt"


   7450, aka G4 second generation (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7450 -O2 -pipe -fsigned-char -maltivec -mabi=altivec -mpowerpc-gfxopt"
CXXFLAGS="-mcpu=7450 -O2 -pipe -fsigned-char -maltivec -mabi=altivec -mpowerpc-gfxopt"

[end quote]

etc ...