Re: Bug#798710: jit-playback changes brake package pygccjit build

Control: severity -1 wishlist
Control: tags -1 + help

On 09/11/2015 10:11 PM, Jurica Stanojkovic wrote:
> Package: gcc-5
> Version: 5.2.1-15
> Severity: serious
> Tags: sid
> User: [email protected]
> 
> Package gcc-5_5.2.1-15 is causing following issue during package pygccjit_0.4-4 build:

pygccjit never built on mips/mipsel. Please investigate and send a patch to
upstream.

> test_bf_jit (test.JitTests) ... /tmp/libgccjit-HxB6hJ/fake.s: Assembler messages:
> /tmp/libgccjit-HxB6hJ/fake.s:14: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> /tmp/libgccjit-HxB6hJ/fake.s:14: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> /tmp/libgccjit-HxB6hJ/fake.s:15: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> /tmp/libgccjit-HxB6hJ/fake.s:22: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> /tmp/libgccjit-HxB6hJ/fake.s:24: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> /tmp/libgccjit-HxB6hJ/fake.s:201: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> /tmp/libgccjit-HxB6hJ/fake.s:202: Error: `fp=xx' used with a cpu lacking ldc1/sdc1 instructions
> libgccjit.so: error: error invoking gcc driver: exit_status: 256 err: 0
> libgccjit.so: error: whilst attempting to run a driver named: mipsel-linux-gnu-gcc-5
> libgccjit.so: error: PATH was: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
> ERROR
> 
> For this issue to be seen on pygccjit build log, one could rebuild package against new gcc-5 version.
> 
> This issue is not noticed with gcc-5 version gcc-5_5.1.1-13 that is in pygccjit build log:
> https://buildd.debian.org/status/fetch.php?pkg=pygccjit&arch=mips&ver=0.4-4&stamp=1436417562
> Problem that is present with gcc-5_5.1.1-13 is still there on gcc-5_5.2.1-15 and I will open a separate bug report for this issue.
> 
> Here are lines that I get during package build with gcc-5_5.1.1-14:
>  gcc-5 -shared /tmp/libgccjit-z1jPnd/fake.s -o /tmp/libgccjit-z1jPnd/fake.so -fno-use-linker-plugin
> 
> and gcc-5_5.2.1-15:
> gcc-5 -EL -mips1 -mabi=32 -shared /tmp/libgccjit-piCaTh/fake.s -o /tmp/libgccjit-piCaTh/fake.so -fno-use-linker-plugin
> 
> Notice mips1 flag in build line.
> 
> I have traced back changes that caused this new issue and they are first introduces with gcc-5_5.2.1-13 version:
> https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/jit/jit-playback.h?r1=225207&r2=226126
> https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/jit/jit-playback.c?r1=225726&r2=226126
> 
> After reverting these patches on MIPS this issue is not there any more.
> This is confirmed with gcc-5_5.2.1-15 built with those changes reverted.
> 
> This issue is found in versions:
> 5.2.1-13, 5.2.1-14, 5.2.1-15, 5.2.1-16.
> 
> Suggestions are welcomed.
> 
> Thank you!
> 
> Regards,
> Jurica
>