Re: [Buildroot] [PATCH] package/openssh: fix compile issue for m68k

[Giulio Benetti <giulio.benetti@benettiengineering.com>]

On 06/08/23 20:39, Giulio Benetti wrote:
> Hi Waldemar,
> 
> On 06/08/23 19:37, Waldemar Brodkorb wrote:
>> Following ICE occurs:
>> (cd openbsd-compat && /home/autobuild/make/make)
>> make[2]: Entering directory 
>> '/home/autobuild/autobuild/instance-10/output-1/build/openssh-9.3p1/openbsd-compat'
>> /home/autobuild/autobuild/instance-10/output-1/host/bin/m68k-buildroot-linux-uclibc-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O3 -g0  -pipe -Wno-error=format-truncation -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -Wimplicit-fallthrough -Wmisleading-indentation -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -ftrapv -fzero-call-used-regs=all -fno-builtin-memset   -fPIC -I. -I.. -I. -I./.. -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_GNU_SOURCE -DHAVE_CONFIG_H -c bsd-asprintf.c
>> /home/autobuild/autobuild/instance-10/output-1/host/bin/m68k-buildroot-linux-uclibc-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O3 -g0  -pipe -Wno-error=format-truncation -Wall -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result -Wimplicit-fallthrough -Wmisleading-indentation -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -ftrapv -fzero-call-used-regs=all -fno-builtin-memset   -fPIC -I. -I.. -I. -I./.. -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_GNU_SOURCE -DHAVE_CONFIG_H -c bsd-closefrom.c
>> during RTL pass: zero_call_used_regs
>> bsd-closefrom.c: In function 'closefrom':
>> bsd-closefrom.c:151:1: internal compiler error: in change_address_1, 
>> at emit-rtl.c:2275
>>    151 | }
>>        | ^
>> 0x7fa76f4bad09 __libc_start_main
>>     ../csu/libc-start.c:308
>> Please submit a full bug report,
>> with preprocessed source if appropriate.
>> Please include the complete backtrace with any bug report.
>> See <http://bugs.buildroot.net/> for instructions.
>> make[2]: *** [Makefile:106: bsd-closefrom.o] Error 1
>>
>> Fixes following autobuild failure:
>> http://autobuild.buildroot.net/results/d29/d29c662e41d8969e6a8aa24870e728bcc7050563/
>>
>> Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
>> ---
>>   package/openssh/openssh.mk | 5 +++++
>>   1 file changed, 5 insertions(+)
>>
>> diff --git a/package/openssh/openssh.mk b/package/openssh/openssh.mk
>> index e14d752290..65f02088a0 100644
>> --- a/package/openssh/openssh.mk
>> +++ b/package/openssh/openssh.mk
>> @@ -35,6 +35,11 @@ define OPENSSH_PERMISSIONS
>>       /var/empty d 755 root root - - - - -
>>   endef
>> +# workaround gcc ICE with 11.x/12.x and 13.x
>> +ifeq ($(BR2_m68k),y)
>> +OPENSSH_CONF_OPTS += --without-hardening
>> +endif
>> +
> 
> This deserves a gcc bug that I've added with this patch:
> https://patchwork.ozlabs.org/project/buildroot/patch/20230806183738.257006-1-giulio.benetti@benettiengineering.com/
> 
> this is the bug:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80786
> 
> and for consistency in Buildroot we tend to work-around gcc/binutils
> bugs, whenever possible, by lowering the optimization to -O0, so I ask
> you to send a patch doing this.
> You can take as a model this commit for the commit log too:
> https://gitlab.com/buildroot.org/buildroot/-/commit/803247337d35643afdca9718c4616500b9930f2d

By the way I've given a try with -O0 workaround but it still shows gcc
ICE with gcc 13.2.0. So at this point I would disable hardening like
you've proposed but by checking for BR2_TOOLCHAIN_HAS_GCC_BUG_80786
instead of BR2_m68k. Can you provide such patch pointing that it
depends on mine on a cover letter or after the 3 dashes?

Thank you!
Best regards
-- 
Giulio Benetti
CEO&CTO@Benetti Engineering sas
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