Re: [avr-libc-dev] How attached are people to the implementation of rand()/random()?

[George Spelvin]

> I'd propose you use GCC trunk HEAD and Binutils master; if that and
> rerunning bootstrap does not do the trick, you found a bug and I
> wonder how the folks are testing avr-libc :-)

I'm working on compiling GCC trunk, but it has required a
little debugging.  The build has failed a couple of times, and
$objdir/gcc/fixinc_list is getting created with the contents ";",
which causes an error at "make install" time.

Clearing that file makes the error go away and I have a working compiler,
but no <limits.h> file, which causes some later configure tests to fail.
But I can see one in $objdir/gcc/include-fixedlimits.h/limits.h and
manually copy it to $prefix/lib/gcc/avr/7.0.0/include-fixed

That seems to be working.  Then I screwed myself up because I only did
"make clean; make" in the avr-libc directory and didn't re-run configure.

But after all that, I get lots of tests passing!  Quite a few failures,
such as:

Simulate: regression/bug-22828.c atmega128 ... /tmp/cciW6XcS.o: In function 
`main':
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-22828.c:50: undefined 
reference to `eeprom_write_block'
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-22828.c:52: undefined 
reference to `eeprom_read_block'
collect2: error: ld returned 1 exit status
*** compile failed
Simulate: regression/bug-25723.c atmega128 ... OK
Simulate: regression/bug-25723.c at90s8515 ... OK
Simulate: regression/bug-27235-1.c atmega128 ... OK
Simulate: regression/bug-27235-1.c at90s8515 ... OK
Simulate: regression/bug-27242.c atmega128 ... *** simulate failed: 8
Simulate: regression/bug-27242.c at90s8515 ... *** simulate failed: 8
Simulate: regression/bug-28135.c atmega128 ... OK
Simulate: regression/bug-28135.c at90s8515 ... OK
Simulate: regression/bug-31644.c atmega128 ... /tmp/cc1lM4bi.o: In function 
`build_pwm_table':
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-31644.c:77: undefined 
reference to `eeprom_read_word'
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-31644.c:79: undefined 
reference to `eeprom_read_word'
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-31644.c:80: undefined 
reference to `eeprom_read_word'
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-31644.c:81: undefined 
reference to `eeprom_read_word'
~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-31644.c:82: undefined 
reference to `eeprom_read_word'
/tmp/cc1lM4bi.o:~/avr/avr-libc/avr-libc/tests/simulate/regression/bug-31644.c:83:
 more undefined references to `eeprom_read_word' follow
collect2: error: ld returned 1 exit status
*** compile failed
Simulate: regression/bug-35093.c atmega128 ... OK
Simulate: regression/bug-35093.c at90s8515 ... OK

but it generally looks good.


One annoying error that pops up a lot is 

Simulate: stdlib/dtostrf-01.c atmega128 ... In file included from 
stdlib/dtostrf-01.c:36:0:
stdlib/dtostrf.h: In function 'run_dtostrf':
stdlib/dtostrf.h:99:8: warning: assignment discards 'const' qualifier from 
pointer target type [-Wdiscarded-array-qualifiers]
     pv = & pt->pattern;
        ^
OK
Simulate: stdlib/dtostrf-01.c at90s8515 ... In file included from 
stdlib/dtostrf-01.c:36:0:
stdlib/dtostrf.h: In function 'run_dtostrf':
stdlib/dtostrf.h:99:8: warning: assignment discards 'const' qualifier from 
pointer target type [-Wdiscarded-array-qualifiers]
     pv = & pt->pattern;
        ^
OK
Simulate: stdlib/dtostrf-big.c atmega128 ... In file included from 
stdlib/dtostrf-big.c:37:0:
stdlib/dtostrf.h: In function 'run_dtostrf':
stdlib/dtostrf.h:99:8: warning: assignment discards 'const' qualifier from 
pointer target type [-Wdiscarded-array-qualifiers]
     pv = & pt->pattern;
        ^
OK


I'll submit a patch for that.