11.0: head/lib/libsysdecode/Makefile for . . ./libsoft/usr/include uses CPP when XCPP needed?

[Mark Millard]

On 2016-Apr-3, at 9:48 PM, Warner Losh <imp bsdimp.com> wrote:
> 
> On Sun, Apr 3, 2016 at 10:25 PM, Mark Millard <markmi dsl-only.net> wrote:
> For an amd64 -> armv7a (rpi2 targeting) cross-compile the code
> 
> > # $FreeBSD: head/lib/libsysdecode/Makefile 295931 2016-02-23 20:00:55Z jhb $
> >
> > . . .
> > ioctl.c: mkioctls
> >         env MACHINE=${MACHINE} CPP="${CPP}" \
> >                 /bin/sh ${.CURDIR}/mkioctls ${DESTDIR}${INCLUDEDIR} > ${.TARGET}
> 
> (with its use of CPP instead of the XCPP) got:
> 
> > --- all_subdir_lib/libsysdecode ---
> > --- ioctl.c ---
> > env MACHINE=arm CPP="/usr/bin/clang-cpp"  /bin/sh /usr/src/lib/libsysdecode/mkioctls /usr/obj/clang/arm.armv6/usr/src/libsoft/usr/include > ioctl.c
> > . . .
> > --- 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.
> >    ^
> 
> In my case I had the following in the in-use src.conf in order to control the cross compile specifics:
> 
> > XCC=/usr/bin/clang -target ${TO_TYPE}--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7 -mno-unaligned-access
> > XCXX=/usr/bin/clang++ -target ${TO_TYPE}--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7 -mno-unaligned-access
> > XCPP=/usr/bin/clang-cpp -target ${TO_TYPE}--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7 -mno-unaligned-access
> 
> 
> (I've been doing such for a long time but only just progressed to a 11.0 source vintage with libsoft involved.)
> 
> Even if I'm out of bounds for technique in some way I expect that
> 
> > ioctl.c: mkioctls
> >         env MACHINE=${MACHINE} CPP="${CPP}" \
> >                 /bin/sh ${.CURDIR}/mkioctls ${DESTDIR}${INCLUDEDIR} > ${.TARGET}
> 
> is not doing everything it should to have the full context needed for . . ./machine/acle-compat.h .
> 
> It's gotta be upstream. XCPP XCC and XCXX are all exclusive to Makefile.inc1. It's up to it to sort out the
> rest...  And none of the X{AR,AS,LD,etc} are defined, so there's bound to be an impedance mismatch. :)
> In the past when I've seen this it's been due to some kind of variable contamination, perhaps one that's
> not otherwise known...
> 
> Warner

For reference the src.conf used for amd64 -> arm is:

> KERNCONF=RPI2-NODBG
> TARGET=arm
> .if ${.MAKE.LEVEL} == 0
> TARGET_ARCH=armv6
> .export TARGET_ARCH
> .endif
> #
> WITH_LIBSOFT=
> WITH_FAST_DEPEND=
> WITH_LIBCPLUSPLUS=
> WITH_BINUTILS_BOOTSTRAP=
> WITH_CLANG=
> WITH_CLANG_IS_CC=
> WITH_CLANG_FULL=
> WITH_LLDB=
> WITH_CLANG_EXTRAS=
> WITH_BOOT=
> #
> WITHOUT_LIB32=
> WITHOUT_ELFTOOLCHAIN_BOOTSTRAP=
> WITHOUT_CLANG_BOOTSTRAP=
> WITHOUT_GCC_BOOTSTRAP=
> WITHOUT_GCC=
> WITHOUT_GNUCXX=
> #
> NO_WERROR=
> MALLOC_PRODUCTION=
> #
> WITH_DEBUG_FILES=
> #
> .if ${.MAKE.LEVEL} == 0
> XCC=/usr/bin/clang -target ${TARGET_ARCH}--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7 -mno-unaligned-access
> XCXX=/usr/bin/clang++ -target ${TARGET_ARCH}--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7 -mno-unaligned-access
> XCPP=/usr/bin/clang-cpp -target ${TARGET_ARCH}--freebsd11.0-gnueabi -march=armv7a -mcpu=cortex-a7 -mno-unaligned-access
> .export XCC
> .export XCXX
> .export XCPP
> .endif
> #
> .if ${.MAKE.LEVEL} == 0
> CC=/usr/bin/clang
> CXX=/usr/bin/clang++
> CPP=/usr/bin/clang-cpp
> .export CC
> .export CXX
> .export CPP
> .endif


===
Mark Millard
markmi at dsl-only.net