Date: Wed, 03 Dec 2003 11:12:47 +1000 From: Peter Grehan <grehan@freebsd.org> To: matt@niblet.co.uk Cc: freebsd-ppc@freebsd.org Subject: Re: cross compile? Message-ID: <3FCD388F.1030708@freebsd.org> In-Reply-To: <EKENLNBIDBAHKIELDLPNIELGCAAA.matt@kittycat.co.uk> References: <EKENLNBIDBAHKIELDLPNIELGCAAA.matt@kittycat.co.uk>
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> I have a FreeBSD 5.1 machine here anyway. Knocking up a PPC version
> on it for my Pegasos would be a sweet deal.
You're all set - FreeBSD already cross-compiles:
cd /usr/src
make -DNO_WERROR TARGET_ARCH=powerpc buildworld
make -DNO_WERROR TARGET_ARCH=powerpc buildkernel
I've made two changes that might be required:
RCS file: /usr/home/ncvs/src/lib/libc/powerpc/_fpmath.h,v
diff -u -r1.2 _fpmath.h
--- _fpmath.h 5 Apr 2003 22:10:13 -0000 1.2
+++ _fpmath.h 18 Nov 2003 02:41:36 -0000
@@ -29,14 +29,13 @@
union IEEEl2bits {
long double e;
struct {
- unsigned int sign :1;
- unsigned int exp :15;
- unsigned long manh :48;
- unsigned long manl :64;
+ unsigned int sign :1;
+ unsigned int exp :15;
+ unsigned long long manh :48;
+ unsigned long long manl :64;
} bits;
};
-/* XXX does powerpc have a normalization bit? */
#define mask_nbit_l(u) ((void)0)
#define LDBL_IMPLICIT_NBIT
RCS file: /usr/home/ncvs/src/sys/conf/kern.mk,v
retrieving revision 1.37
diff -u -r1.37 kern.mk
--- kern.mk 4 Nov 2003 23:29:17 -0000 1.37
+++ kern.mk 18 Nov 2003 03:42:58 -0000
@@ -68,6 +68,14 @@
.endif
#
+# For powerpc disable kernel floating point
+#
+.if ${MACHINE_ARCH} == "powerpc"
+CFLAGS+= -msoft-float
+INLINE_LIMIT?= 15000
+.endif
+
+#
# GCC 3.0 and above like to do certain optimizations based on the
# assumption that the program is linked against libc. Stop this.
#
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