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bug#28308: Build failure on FreeBSD/aarch64


From: Gergely Czuczy
Subject: bug#28308: Build failure on FreeBSD/aarch64
Date: Wed, 20 Sep 2017 07:51:47 +0200
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

On 2017. 09. 11. 19:17, Eli Zaretskii wrote:
Cc: address@hidden, address@hidden
From: Gergely Czuczy <address@hidden>
Date: Mon, 11 Sep 2017 19:12:12 +0200

That's a call to delete_terminal, which doesn't appear in your
backtrace, and doesn't call xpalloc, either.  So thanks, but I'm still
confused.  Are you sure this is an unoptimized build?  Is it possible
that we are looking at LLDB bug?
It's the lldb debug, right. And I'm sure it's an unoptimized build, I've
went back and checked the build flags:
cc -Demacs  -I. -I. -I../lib -I../lib
-I/usr/local/include/libxml2             -MMD -MF deps/.d -MP
-Wno-switch -Wno-pointer-sign -Wno-string-plus-int
-Wno-unknown-attributes -Wno-initializer-overrides
-Wno-tautological-compare
-Wno-tautological-constant-out-of-range-compare -O0 -g
-fno-strict-aliasing  -Wl,-znocombreloc  (...)

If that helps, I can create a qemu VM with this fbsd build, and give you
the image.
Would it be possible for you to install GDB, and then repeat the same
experiment under GDB?
So, here's the image for the reproduction:
http://czg.harmless.hu/emacs/qemu-28308.gz
You can start it with:
qemu-system-aarch64 -m 4096M -cpu cortex-a57 -M virt  \
                    -accel tcg,thread=single \
                    -bios QEMU_EFI.fd -serial telnet::4444,server -nographic \
                    -drive if=none,file=${image},id=hd0,format=raw \
                    -device virtio-blk-device,drive=hd0 \
                    -device e1000,netdev=net0 \
                    -netdev tap,id=net0,ifname=tap0,script=/tank/rpi3/build/qemu-ifup.sh

adjust the $image, and the last line for the networking, it just sets the IP address on the host device:
ifname=$1
ifconfig ${ifname} inet 10.219.14.254/24

The root password is "foobar", has an sshd running, so you can later log in, tramp into it,etc.

Steps to reproduce the build failure:
cd /usr/ports/editors/emacs-devel
setenv CFLAGS "-O0 -glldb"
setenv CXXFLAGS "-O0 -glldb"
make -DTRYBROKEN DISABLE_VULNERABILITIES=yes build

The ports tree extracts the source under and does the actual build under work/, you will find it all there.

Also, just in case, I've checked out the emacs source from github under /root/emacs/, to save you some time if that's needed.

If you would like to test the build from a different checkout in ports, just update /usr/ports/editors/emacs-devel/Makefile:
1) update the GH_TAGNAME
2) rm distinfo
3) make makesum
4) rm -rf work
5) then you can start the build again

I hope this helps.

Best regards,
Gergely






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