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From: Anonymous on 6 Jul 2010 14:57
(CC'ing freebsd-ports@)

Christopher Key <cjk32(a)cam.ac.uk> writes:

> Is there any equivalent to IA32_BINARY_PORT for linux binary
> distributions? I assume that at the moment, linux binary
> compatibility only exists on i386 and amd64, but I don't see any
> reason why this should always be the true, in which case there would
> need to be some way to define which platforms the distributed binaries
> will run on.

IA32_BINARY_PORT checks /usr/lib32 and compat.ia32.maxvmem presence.
I don't think it'll work with dynmaic linking against 32bit library
from ports (not misc/compat[3-7]x).

As there is currently only 32bit linux base support I think only
compat.linux32.maxvmem needs to be checked for USE_LINUX case.

%%
Index: Mk/bsd.port.mk
===================================================================
RCS file: /a/.cvsup/ports/Mk/bsd.port.mk,v
retrieving revision 1.642
diff -u -p -r1.642 bsd.port.mk
--- Mk/bsd.port.mk 4 Jun 2010 08:09:17 -0000 1.642
+++ Mk/bsd.port.mk 6 Jul 2010 18:50:08 -0000
@@ -1714,10 +1714,14 @@ HAVE_COMPAT_IA32_LIBS?= YES
.if !defined(HAVE_COMPAT_IA32_KERN)
HAVE_COMPAT_IA32_KERN!= if ${SYSCTL} -n compat.ia32.maxvmem >/dev/null 2>&1; then echo YES; fi
.endif
+.if !defined(HAVE_COMPAT_LINUX32_KERN)
+HAVE_COMPAT_LINUX32_KERN!= if ${SYSCTL} -n compat.linux32.maxvmem >/dev/null 2>&1; then echo YES; fi
+.endif
.endif

.if defined(IA32_BINARY_PORT) && ${ARCH} != "i386"
.if ${ARCH} == "amd64" || ${ARCH} == "ia64"
+.if !defined(USE_LINUX)
.if !defined(HAVE_COMPAT_IA32_KERN)
IGNORE= requires a kernel with compiled-in IA32 compatibility
.elif !defined(HAVE_COMPAT_IA32_LIBS)
@@ -1725,6 +1729,9 @@ IGNORE= requires 32-bit libraries insta
.endif
_LDCONFIG_FLAGS=-32
LIB32DIR= lib32
+.elif !defined(HAVE_COMPAT_LINUX32_KERN)
+IGNORE= requires a kernel with compiled-in LINUX32 compatibility
+.endif
.else
IGNORE= requires i386 (or compatible) platform to run
.endif
%%
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