The below forwards an example of a possibly more general issue not necessarily
limited to arm context of the example: in a cross compile context the host CPP
is in use via Makefile.libcompat not involving "${XCPP}" and so various macro
checks for the target context fail to work.
[The below and the material leading up to it was originally posted to
freebsd-arm.]
===
Mark Millard
markmi at dsl-only.net
On 2016-Apr-4, at 2:02 PM, Mark Millard <markmi at dsl-only.net> wrote:
As a fix for
>> --- all_subdir_lib/libsysdecode ---
>> In file included from <stdin>:17:
>> In file included from
>> /usr/obj/clang/arm.armv6/usr/src/libsoft/usr/include/dev/nvme/nvme.h:36:
>> In file included from
>> /usr/obj/clang/arm.armv6/usr/src/libsoft/usr/include/sys/param.h:135:
>> In file included from
>> /usr/obj/clang/arm.armv6/usr/src/libsoft/usr/include/machine/param.h:49:
>> /usr/obj/clang/arm.armv6/usr/src/libsoft/usr/include/machine/acle-compat.h:182:4:
>> error: Unable to determine architecture version.
>> # error Unable to determine architecture version.
>> ^
I tested building an amd64 -> arm cross-build based on
> # svnlite diff Makefile.libcompat
> Index: Makefile.libcompat
> ===================================================================
> --- Makefile.libcompat (revision 297514)
> +++ Makefile.libcompat (working copy)
> @@ -90,6 +90,7 @@
> DTRACE="${LIB$COMPATDTRACE:U${DTRACE}}"
> LIBCOMPATWMAKEFLAGS+= CC="${XCC} ${LIBCOMPATCFLAGS}" \
> CXX="${XCXX} ${LIBCOMPATCFLAGS} ${LIBCOMPATCXXFLAGS}" \
> + CPP="${XCPP}" \
> DESTDIR=${LIBCOMPATTMP} \
> -DNO_CPU_CFLAGS \
> MK_CTF=no \
and it completed without getting an "error:". So this addition to
Makefile.libcompat may be one option for a fix.
===
Mark Millard
markmi at dsl-only.net
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