Building an ARM/RPI-B release (hacked) on CURRENT/AMD64.

[Mark R V Murray]

On 17 Apr 2014, at 02:25, Tim Kientzle <tim at kientzle.com> wrote:

>> The problem is that during the u-boot build, a CLANG-based xdev build is used, and this has no *-gcc, only a *-cc. If I fix that with a symlink, clang then objects to the -ffixed-r8 option. Clang has an equivalent -ffixed-r9, but the u-boot that is  mandated for FreeBSD/Arm/RPI use doesn’t have the R9 fix.
>> 
>> Questions:
>> 
>> 1) Are you aware of any of this?
> 
> Yes.
> 
>> 
>> 2) Do you have a quick fix idea (preferably not involving GCC)?
> 
> No.  <sigh>
> 
> Right now, the “get it working” answer is to install GCC XDEV tools.

Even that was broken, but I have it fixed now, locally. I’ll tidy up the patches and send them all out later.

> Though I tried that on a clean system last weekend and it
> still failed to build.  Haven’t tracked down why.

src/release/arm/release.sh needs this:

@@ -96,27 +96,27 @@
        # This is not '-j'-safe, so force '-j1' to allow using
        # additional, non-'-j' options specified in WORLD_FLAGS.
        eval chroot ${CHROOTDIR} make -C /usr/src/gnu/usr.bin/cc \
-               WITH_GCC=1 ${WORLD_FLAGS} -j1 obj depend all install
+               WITH_GCC=1 WITH_GNUXX=1 ${WORLD_FLAGS} -j1 obj depend all install
        # Build the 'xdev' target for crochet.
-       eval chroot ${CHROOTDIR} make -C /usr/src WITHOUT_CLANG_IS_CC=1 \
-               XDEV=${XDEV} XDEV_ARCH=${XDEV_ARCH} WITH_GCC=1 \
+       eval chroot ${CHROOTDIR} make -C /usr/src WITHOUT_CLANG_IS_CC=1 WITHOUT_CLANG=1 \
+               XDEV=${XDEV} XDEV_ARCH=${XDEV_ARCH} WITH_GCC=1 WITH_GNUXX=1 \
                ${WORLD_FLAGS} xdev
 
        # Run the ldconfig(8) startup script so /var/run/ld-elf*.so.hints
        # is created.

>> I’m rather short of time right now, but may be able to get to this over Easter.
> 
> Long-term, we’d all like to see U-Boot build with clang.
> 
> No idea yet whether that’s hard or not.  No idea if
> I’ll have time to work on it in the near future.

How much hacking does u-boot need for 1) FreeBSD and 2) RPI?

Should its head-of-trunk “just work”? They have apparently sorted out the R8/R9 business which should make it CLANG-ready, IIUC.

M
-- 
Mark R V Murray

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