Date: Fri, 27 Apr 2012 14:51:04 -0500 From: Mark Tinguely <marktinguely@gmail.com> To: Tim Kientzle <kientzle@freebsd.org> Cc: arm@freebsd.org Subject: Re: Cross-buildworld works but not native build? Message-ID: <CAP%2BM-_Ev1TE7JEmSRbVPg3HRwMfsPVyNyR92X5UONdxmGryuaQ@mail.gmail.com> In-Reply-To: <9AD7075B-B85D-40DB-84B7-FD630B858A30@freebsd.org>
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On Fri, Apr 27, 2012 at 1:48 AM, Tim Kientzle <kientzle@freebsd.org> wrote: > I've been working with the projects/armv6 tree and have encountered a very confusing situation. > > On i386, this works: > $ make TARGET_ARCH=arm TARGET_CPUTYPE=armv6 buildworld > > If I take the resulting world and run it on arm, then the following fails (with the exact same source): > $ make buildworld > …. > cc -O -pipe -fpic -fvisibility=hidden -DVISIBILITY_HIDDEN -std=gnu99 -Wsystem-headers -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -c /usr/src/lib/libcompiler_rt/../../contrib/compiler-rt/lib/umoddi3.c -o umoddi3.o > cc -O -pipe -fpic -fvisibility=hidden -DVISIBILITY_HIDDEN -std=gnu99 -Wsystem-headers -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -c /usr/src/lib/libcompiler_rt/../../contrib/compiler-rt/lib/umodti3.c -o umodti3.o > cc -O -pipe -fpic -fvisibility=hidden -DVISIBILITY_HIDDEN -std=gnu99 -Wsystem-headers -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -c /usr/src/lib/libcompiler_rt/__sync_fetch_and_add_4.c -o __sync_fetch_and_add_4.o > In file included from /usr/src/lib/libcompiler_rt/__sync_fetch_and_op_n.h:31, > from /usr/src/lib/libcompiler_rt/__sync_fetch_and_add_4.c:6: > /usr/obj/usr/src/tmp/usr/include/machine/atomic.h: In function 'atomic_cmpset_32': > /usr/obj/usr/src/tmp/usr/include/machine/atomic.h:491: error: 'ARM_RAS_START' undeclared (first use in this function) > /usr/obj/usr/src/tmp/usr/include/machine/atomic.h:491: error: (Each undeclared identifier is reported only once > /usr/obj/usr/src/tmp/usr/include/machine/atomic.h:491: error: for each function it appears in.) > /usr/obj/usr/src/tmp/usr/include/machine/atomic.h: In function 'atomic_add_32': > /usr/obj/usr/src/tmp/usr/include/machine/atomic.h:516: error: 'ARM_RAS_START' undeclared (first use in this function) > > > Looking at the source, ARM_RAS_START really does seem to be undeclared (it's declared in sysarch.h, but atomic.h only includes sysarch.h for kernel builds). > > So it looks to me like the cross-buildworld should fail also. In any case, it's not clear why the two aren't behaving the same way. > > Tim > Looks like ARM_ARCH_6 or ARM_ARCH_7A is not defined. ARM_RAS_START/ARM_RAS_END has been removed out of the the ARMv6/ARMv7 in favor of the ldrex/strex operations. Also the ARM_TP_ADDRESS is not used nor mapped and uses a built-in processor thread register. --Mark.home | help
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