Re: Compiling GCC 10.2 on AIX 7.2

["Kewen.Lin" <linkw@linux.ibm.com>]

Hi Randal,

on 2020/8/19 上午6:38, Randal T. Rioux wrote:
> On 8/17/20 3:28 PM, Randal T. Rioux wrote:
>> On 8/17/20 12:15 PM, Jonathan Wakely wrote:
>>> On Mon, 17 Aug 2020 at 17:12, Randal T. Rioux <randal@procyonlabs.com> wrote:
>>>>
>>>> On 8/17/20 6:28 AM, Jonathan Wakely wrote:
>>>>> On Mon, 17 Aug 2020 at 07:04, Randal T. Rioux <randal@procyonlabs.com> wrote:
>>>>>>
>>>>>> System: IBM POWER 740 (POWER7 CPU)
>>>>>> OS Level: 7200-04-02-2016
>>>>>> Bootstrap Compiler: GCC 8.3.0 from AIX Toolbox (IBM yum repo)
>>>>>>
>>>>>> Please let me know if I need to include anything else. Hopefully I've
>>>>>> provided enough information to aid in my request here.
>>>>>>
>>>>>> Environment Variables:
>>>>>>
>>>>>> export CFLAGS="-mcpu=power7 -pipe -O2 -I/opt/freeware/include"
>>>>>> export CXXFLAGS=$CFLAGS
>>>>>> export LDFLAGS="-L/opt/freeware/lib64 -L/opt/freeware/lib
>>>>>> -Wl,-blibpath:/opt/freeware/lib64:/opt/freeware/lib:/usr/lib:/lib
>>>>>> -Wl,-bmaxdata:0x80000000"
>>>>>> export CONFIG_SHELL=/opt/freeware/bin/bash
>>>>>> export CONFIG_ENV_ARGS=/opt/freeware/bin/bash
>>>>>>
>>>>>> configure output: https://pastebin.com/FinvPRPU
>>>>>> config.log: https://pastebin.com/4Y30z9tU
>>>>>> config.status: https://pastebin.com/C7ZC9uzB
>>>>>>
>>>>>> configure seems to work fine, although the config.log seems to show it
>>>>>> ignores my flags to only enable c/c++ compilers (I could be reading this
>>>>>> wrong).
>>>>>
>>>>> You are reading it wrong.
>>>>
>>>> Okay then.
>>>>
>>>>>> Running make works for a little bit, then dies around:
>>>>>>
>>>>>> (snip)
>>>>>> mkdir -p -- common/.deps
>>>>>> mkdir -p -- analyzer/.deps
>>>>>> config.status: executing default commands
>>>>>> gmake[2]: Leaving directory '/usr/src/gcc-build'
>>>>>> gmake[1]: *** [Makefile:20799: stage1-bubble] Error 2
>>>>>> gmake[1]: Leaving directory '/usr/src/gcc-build'
>>>>>> gmake: *** [Makefile:1002: all] Error 2
>>>>>
>>>>> You've snipped the actual error so we can't see what failed.
>>>>
>>>> What specifically would help you (or anyone else) to diagnose this?
>>>
>>> Showing the error.
>>>
>>> Something failed, and then make kept printing some more lines and then
>>> exited. You've only shown the exiting part, not the error that
>>> preceded it.
>>
>> I see - running parallel make added output past the failure point.
>>
>> This is the part where it conks out:
>>
>> (snip)
>> gcc -mcpu=power7 -pipe -O2 -I/opt/freeware/include -L/opt/freeware/lib64
>> -L/opt/freeware/lib
>> -Wl,-blibpath:/opt/freeware/lib64:/opt/freeware/lib:/usr/lib:/lib
>> -Wl,-bmaxdata:0x80000000 -o fixincl fixincl.o fixtests.o fixfixes.o
>> server.o procopen.o fixlib.o fixopts.o ../libiberty/libiberty.a
>> collect2: fatal error: ../libiberty/libiberty.a: not a COFF file
>> compilation terminated.
>> gmake[3]: *** [Makefile:110: full-stamp] Error 1
>> gmake[3]: Leaving directory
>> '/usr/src/gcc-build/build-powerpc-ibm-aix7.2.4.0/fixincludes'
>> gmake[2]: *** [Makefile:2880: all-build-fixincludes] Error 2
>> gmake[2]: Leaving directory '/usr/src/gcc-build'
>> gmake[1]: *** [Makefile:20799: stage1-bubble] Error 2
>> gmake[1]: Leaving directory '/usr/src/gcc-build'
>> gmake: *** [Makefile:1002: all] Error 2
>>
>> Could it be an ld or binutils issue?
> 
> Quick update.
> 
> Uninstalling GNU binutils helped. But I hit a different wall.
> 
> These are my current environment variables (which work for compiling
> other software like Apache HTTPD):
> 
> # export CONFIG_SHELL=/opt/freeware/bin/bash
> # export CONFIG_ENV_ARGS=/opt/freeware/bin/bash
> # export CFLAGS="-maix64 -mcpu=power7 -D_LARGE_FILES -pipe -O2
> -I/opt/freeware/include"
> # export CXXFLAGS=$CFLAGS
> # export RM="/usr/bin/rm -f"
> # export AR="/usr/bin/ar -X64"
> # export OBJECT_MODE=64"
           ~~~~~~~~~~~~~~ " typo?

I did a check locally, the wrong OBJECT_MODE caused the assembler
error like

Assembler:
/tmp//ccZmd28O.s: line 1: 1252-192 Assembly mode is not specified.
        Set the OBJECT_MODE environment variable to 32 or 64 or
        use the -a32 or -a64 option.

Hope it's just a pasted typo, isn't responsible for this error.

> # export LDFLAGS="-L/opt/freeware/lib64 -L/opt/freeware/lib -maix64
> -Wl,-b64 -Wl,-brtl -Wl,-bbigtoc
> -Wl,-blibpath:/opt/freeware/lib64:/opt/freeware/lib:/usr/lib:/lib"
> 
> This is my configure line:
> 
> # /usr/src/gcc-10.2.0/configure --with-isl=/usr/local --disable-multilib
> --disable-nls --enable-languages=c,c++ --enable-decimal-float=dpd
> --with-cloog=no --with-ppl=no --disable-libstdcxx-pch
> --enable-__cxa_atexit --disable-werror --enable-bootstrap
> 

With David's help, I built gcc trunk on aix7.2 successfully before
with the configuration command like:

$GCC_SRC/configure --enable-languages=c,c++,fortran --disable-werror --with-gmp=/opt/freeware/ --with-libiconv-prefix=/opt/freeware/ --disable-libstdcxx-pch --with-included-gettext --with-cpu=power9 --prefix=$GCC_INSTALL --with-as=/usr/bin/as --with-ld=/usr/bin/ld --disable-bootstrap

I referred to the information here https://gcc.gnu.org/wiki/CompileFarm 
"Building GCC on AIX"

Also installed the required components pointed out here:
  https://gcc.gnu.org/install/prerequisites.html

via the website/repo aix-toolbox 
  https://www.ibm.com/support/pages/aix-toolbox-linux-applications-downloads-alpha

Sorry that I didn't have the access to that machine any more, can't provide more
information by checking the history.

> And this is the end of make where it dies:
> 
> [ -f stage_final ] || echo stage3 > stage_final
> make[1]: Entering directory '/usr/src/gcc-build'
> make[2]: Entering directory '/usr/src/gcc-build'
> make[3]: Entering directory '/usr/src/gcc-build'
> rm -f stage_current
> make[3]: Leaving directory '/usr/src/gcc-build'
> make[2]: Leaving directory '/usr/src/gcc-build'
> make[2]: Entering directory '/usr/src/gcc-build'
> Configuring stage 1 in ./intl
> configure: loading cache ./config.cache
> checking for powerpc-ibm-aix7.2.4.0-gcc... gcc
> checking whether the C compiler works... no
> configure: error: in `/usr/src/gcc-build/intl':
> configure: error: C compiler cannot create executables

It would be good to see what's the specific error.

BR,
Kewen