[OE-core] [PATCH 12/14] meson: update to 0.46.0 -- broke systemd on qemuppc

[Burton, Ross]

Okay, odd.  Hacked in a few compile fixes and now systemd v237 fails
to build with Meson git master:

| FAILED: libsystemd.so.0.21.0
| powerpc-poky-linux-gcc -m32 -mhard-float -mcpu=7400 -mno-spe
-fstack-protector-strong -D_FORTIFY_SOURCE=2 -no-pie -fno-PIE
--sysroot=/data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/recipe-sysroot
 -o libsystemd.so.0.21.0  -Wl,--no-undefined -Wl,--as-needed -shared
-fPIC -Wl,--start-group -Wl,-soname,libsystemd.so.0
-Wl,--whole-archive src/libsystemd/libsystemd.a
src/journal/libjournal-client.a -Wl,--no-whole-archive -Wl,-z,relro
-Wl,-z,now -pie -Wl,--gc-sections src/basic/libbasic.a
src/basic/libbasic-gcrypt.a -pthread -shared
-Wl,--version-script=/data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/git/src/libsystemd/libsystemd.sym
-lrt -Wl,--end-group
/data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/recipe-sysroot/usr/lib/liblzma.so
/data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/recipe-sysroot/lib/libcap.so
/data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/recipe-sysroot/usr/lib/libblkid.so
-lrt -m32 -mhard-float -mcpu=7400 -mno-spe -fstack-protector-strong
-D_FORTIFY_SOURCE=2 -no-pie -fno-PIE
--sysroot=/data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/recipe-sysroot
-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fstack-protector-strong
-Wl,-z,relro,-z,now
| /data/poky-tmp/master/work/ppc7400-poky-linux/systemd/1_237-r0/recipe-sysroot/usr/lib/../lib/crt1.o:(.rodata+0x4):
undefined reference to `main'

I'm guessing the compile option re-ordering is going wrong with our
compiler flags?

Ross

On 20 June 2018 at 00:02, Burton, Ross <ross.burton at intel.com> wrote:
> On 19 June 2018 at 21:24, Nirbheek Chauhan <nirbheek.chauhan at gmail.com> wrote:
>> On Wed, Jun 20, 2018 at 1:39 AM Alexander Kanavin
>> <alex.kanavin at gmail.com> wrote:
>>> FWIW, I did fix a similar (or maybe even same) issue with this patch:
>>> http://git.yoctoproject.org/cgit/cgit.cgi/poky/tree/meta/recipes-devtools/meson/meson/0001-Linker-rules-move-cross_args-in-front-of-output_args.patch
>>>
>>> It's possible that more rearranging needs to be done, or this patch no
>>> longer has the desired effect.
>>>
>>
>> So far in this thread, I don't see any changes that would cause this
>> issue, and that patch shouldn't change things either. The bisection is
>> probably significant, but I am not sure what's going.
>>
>> Also, in general please try to talk to us first before doing a change
>> like that (switching the order of cross_args) so we can investigate
>> and figure out what we should fix. The cross_args are at the end so
>> they can override existing arguments, such as -D flags or -W flags.
>>
>> Another thing to try would be current git, which has significant
>> changes in how we do library resolution, de-duplication, and so on.
>> Specifically, instead of `-lfoo`, we now prefer full paths to the
>> library to use instead since this allows greater flexibility in
>> selecting whether to use shared or static libraries.
>
> So I just generated a snapshot of current git and am building systemd
> with it.  Interestingly, the flag order change is resulting in what
> were warnings now being fatal and systemd fails to build.  One was
> easily fixed with a patch from master, the other will have to wait
> until tomorrow morning, but I will get back to this.
>
> Ross