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Message-ID:	<561BED4D.8080309@gmx.de>
Date:	Mon, 12 Oct 2015 19:26:37 +0200
From:	"Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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To:	djgpp AT delorie DOT com
Subject:	Re: Random compile errors under WIndows (32 bit Windows Vista and
	Windows 10)
References:	<5611566C DOT 4020507 AT iki DOT fi>
In-Reply-To:	<5611566C.4020507@iki.fi>
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Reply-To:	djgpp AT delorie DOT com

Am 04.10.2015 18:40, schrieb Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp AT delorie DOT com]:
> I have earlier noticed random stray compile errors when building
> DJGPP port of gcc under Windows Vista Business. Running make again
> compiled some file without problems. Such errors where
> extremely rare for DJGPP CVS from CVS (also 2.04 before bumping version
> to 2.05). I usually did not get them at all for 2.04 or 2.05. The situation
> was noticeably worse for 2.03p2. Building GCC was still possible but I had to
> restart build often enough.
>
> I have 64-bit Windows 10 (earlier Windows 7) on desktop computer and dual boot
> with Linux (currently Fedora 22 x86_64). So there no DJGPP testing possible in this
> Windows installation for understandable reasons.
>
> Today downloaded 32 bit Windows 10 Enterprise 90 days trial from Microsoft and
> installed it in VirtualBox VM under Linux. I needed slightly more steps to get DJGPP
> working rather than on Windows Vista (for VIsta only registry hack was needed to
> workaround 32MB DMPI memory limit)
>
> Trying to build gcc-5.2.0 on this Windows 10 installation (DJGPP v2.05 only) showed
> that I'm getting stray compiler errors much more often (once per several minutes)
>
> These errors look like:
> gpp -c -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -I. -Ic-family -I/gcc-5.20/gcc -I/gcc-5.20/gcc/c-family -I/gcc-5.20/gcc/../include -I/gcc-5.20/gcc/../libcpp/include -I/gcc-5.20/gcc/../libdecnumber -I/gcc-5.20/gcc/../libdecnumber/dpd -I../libdecnumber -I/gcc-5.20/gcc/../libbacktrace -I/dev/env/DJDIR/include -o c-family/c-gimplify.o -MT c-family/c-gimplify.o -MMD -MP -MF c-family/.deps/c-gimplify.TPo /gcc-5.20/gcc/c-family/c-gimplify.c
> In file included from /gcc-5.20/gcc/flags.h:24:0,
> from /gcc-5.20/gcc/c-family/c-common.h:36,
> from /gcc-5.20/gcc/c-family/c-gimplify.c:41:
> ./options.h:10:0: error: unterminated #if
> #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)
> ^
> ./options.h:3:0: error: unterminated #ifndef
> #ifndef OPTIONS_H
> ^
> Makefile:1066: recipe for target 'c-family/c-gimplify.o' failed
> make.exe[3]: *** [c-family/c-gimplify.o] Error 1
> make.exe[3]: Leaving directory 'c:/build.gcc/gcc'
> Makefile:4376: recipe for target 'all-stage1-gcc' failed
> make.exe[2]: *** [all-stage1-gcc] Error 2
> make.exe[2]: Leaving directory 'c:/build.gcc'
> Makefile:17534: recipe for target 'stage1-bubble' failed
> make.exe[1]: *** [stage1-bubble] Error 2
> make.exe[1]: Leaving directory 'c:/build.gcc'
> Makefile:17838: recipe for target 'bootstrap' failed
> make.exe: *** [bootstrap] Error 2
>
> Same error do not repeat when I try to run 'sh ./djmake.sh bootstrap' again.
>
> Most likely explanation is that reading file (opened in binary mode) is unreliable
> and one randomly gets corrupted data. Total data size is correct as libcpp compares
> data size with one from response of stat() and reports an error in case of size discrepancy
> (we needed to handle DOS end of file mark ^Z specially for that reason)
>
> It could be a bug in NTVDM. It could also be some problem on our side.
> More testing is needed. Such test could repeatedly read some set of files into memory
> and calculate MD5 sum or something similar to detect random corruptions. It would
> be possible to investigate further and see what is getting corrupted
>
>
> How to get DJGPP programs running on Windows 10 32 bit (please comment
> if one has possibility to check on different edition)
>
> Steps needed to get DJGPP apps running on 32 bit WIndows 10 enterprise trial version.
> It may be different in Win 10 Home or WIn 10 Pro. I just do not know.
>
> 1) Dialog asking confirmation for installing NTVDM appears when trying
> to run DJGPP program first time: You need to allow it to be run any DJGPP
> executable (it was when I tried to run unzip32.exe)
>
> 2) 32 MB DPMI memory limit is still present. Use old hack from Windows Vista
> epoch to got around it: Add registry entry DpmiLimit with large enough
> value to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WOW.
> No need to restart Windows. It's active immediately.
> I used value 0x7FFFFFFF and it is accepted and works
>
> 3) Command prompt configuration: mark check box "Use legacy console" active.
> Otherwise ls.exe, bash.exe, less.exe and other similar programs will not work and Windows
> will report NTVDM error
>
> Andris
>


Only for the record, I have compiled gcc520s.zip out-of-the-box a multpile of
times during the last week using a clean DJGPP 2.05 installation as described in:
   <http://www.delorie.com/archives/browse.cgi?p=djgpp/2015/09/27/10:30:09>
on Win2K SP5 and WinXP SP3 without any difficulties.  Every build took around 12h
on a virtual machine, so acouple of days have been invested in this test.

On Win98SE (GUI) the build failed with the following output:

c:/djgpp-2.05/bin/sh.exe ./libtool  --tag=CC   --mode=compile /dev/d/gnu/build.gcc/./gcc/xgcc -B/dev/d/gnu/build.gcc/./gcc/ -B/dev/env/DJDIR/djgpp/bin/ -B/dev/env/DJDIR/djgpp/lib/ -isystem /dev/env/DJDIR/djgpp/include -isystem /dev/env/DJDIR/djgpp/sys-include    -DHAVE_CONFIG_H -I. -I/gnu/gcc-5.20/libgfortran  -iquote/gnu/gcc-5.20/libgfortran/io -I/gnu/gcc-5.20/libgfortran/../gcc -I/gnu/gcc-5.20/libgfortran/../gcc/config -I/gnu/gcc-5.20/libgfortran/../libquadmath -I../.././gcc -I/gnu/gcc-5.20/libgfortran/../libgcc -I../libgcc  -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings -Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules -ffunction-sections -fdata-sections   -g -O2 -MT size_from_kind.lo -MD -MP -MF .deps/size_from_kind.Tpo -c -o size_from_kind.lo `test -f 'io/size_from_kind.c' || echo '/gnu/gcc-5.20/libgfortran/'`io/size_from_kind.c
libtool: compile:  /dev/d/gnu/build.gcc/./gcc/xgcc -B/dev/d/gnu/build.gcc/./gcc/ -B/dev/env/DJDIR/djgpp/bin/ -B/dev/env/DJDIR/djgpp/lib/ -isystem /dev/env/DJDIR/djgpp/include -isystem /dev/env/DJDIR/djgpp/sys-include -DHAVE_CONFIG_H -I. -I/gnu/gcc-5.20/libgfortran -iquote/gnu/gcc-5.20/libgfortran/io -I/gnu/gcc-5.20/libgfortran/../gcc -I/gnu/gcc-5.20/libgfortran/../gcc/config -I/gnu/gcc-5.20/libgfortran/../libquadmath -I../.././gcc -I/gnu/gcc-5.20/libgfortran/../libgcc -I../libgcc -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings -Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules -ffunction-sections -fdata-sections -g -O2 -MT size_from_kind.lo -MD -MP -MF .deps/size_from_kind.Tpo -c /gnu/gcc-5.20/libgfortran/io/size_from_kind.c -o size_from_kind.o
mv -f .deps/size_from_kind.Tpo .deps/size_from_kind.Plo
c:/djgpp-2.05/bin/sh.exe ./libtool  --tag=CC   --mode=compile /dev/d/gnu/build.gcc/./gcc/xgcc -B/dev/d/gnu/build.gcc/./gcc/ -B/dev/env/DJDIR/djgpp/bin/ -B/dev/env/DJDIR/djgpp/lib/ -isystem /dev/env/DJDIR/djgpp/include -isystem /dev/env/DJDIR/djgpp/sys-include    -DHAVE_CONFIG_H -I. -I/gnu/gcc-5.20/libgfortran  -iquote/gnu/gcc-5.20/libgfortran/io -I/gnu/gcc-5.20/libgfortran/../gcc -I/gnu/gcc-5.20/libgfortran/../gcc/config -I/gnu/gcc-5.20/libgfortran/../libquadmath -I../.././gcc -I/gnu/gcc-5.20/libgfortran/../libgcc -I../libgcc  -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings -Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules -ffunction-sections -fdata-sections   -g -O2 -MT close.lo -MD -MP -MF .deps/close.Tpo -c -o close.lo `test -f 'io/close.c' || echo '/gnu/gcc-5.20/libgfortran/'`io/close.c
libtool: compile:  /dev/d/gnu/build.gcc/./gcc/xgcc -B/dev/d/gnu/build.gcc/./gcc/ -B/dev/env/DJDIR/djgpp/bin/ -B/dev/env/DJDIR/djgpp/lib/ -isystem /dev/env/DJDIR/djgpp/include -isystem /dev/env/DJDIR/djgpp/sys-include -DHAVE_CONFIG_H -I. -I/gnu/gcc-5.20/libgfortran -iquote/gnu/gcc-5.20/libgfortran/io -I/gnu/gcc-5.20/libgfortran/../gcc -I/gnu/gcc-5.20/libgfortran/../gcc/config -I/gnu/gcc-5.20/libgfortran/../libquadmath -I../.././gcc -I/gnu/gcc-5.20/libgfortran/../libgcc -I../libgcc -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings -Werror=implicit-function-declaration -Werror=vla -fcx-fortran-rules -ffunction-sections -fdata-sections -g -O2 -MT close.lo -MD -MP -MF .deps/close.Tpo -c /gnu/gcc-5.20/libgfortran/io/close.c -o close.o
/gnu/gcc-5.20/libgfortran/io/close.c: In Funktion »st_close«:
/gnu/gcc-5.20/libgfortran/io/close.c:75:11: Fehler: Implizite Deklaration der Funktion »strdup« [-Werror=implicit-function-declaration]
     path = strdup (u->filename);
            ^
/gnu/gcc-5.20/libgfortran/io/close.c:75:11: Warnung: UnvertrÀgliche implizite Deklaration der eingebauten Funktion »strdup«
/gnu/gcc-5.20/libgfortran/io/close.c:85:15: Warnung: UnvertrÀgliche implizite Deklaration der eingebauten Funktion »strdup«
         path = strdup (u->filename);
                ^
/gnu/gcc-5.20/libgfortran/io/close.c:95:4: Fehler: Implizite Deklaration der Funktion »unlink« [-Werror=implicit-function-declaration]
     unlink (path);
     ^
cc1.exe: Einige Warnungen werden als Fehler behandelt
Makefile:5137: recipe for target 'close.lo' failed
make.exe[3]: *** [close.lo] Error 1
make.exe[3]: Leaving directory 'd:/gnu/build.gcc/djgpp/libgfortran'
Makefile:1297: recipe for target 'all' failed
make.exe[2]: *** [all] Error 2
make.exe[2]: Leaving directory 'd:/gnu/build.gcc/djgpp/libgfortran'
Makefile:15584: recipe for target 'all-target-libgfortran' failed
make.exe[1]: *** [all-target-libgfortran] Error 2
make.exe[1]: Leaving directory 'd:/gnu/build.gcc'
Makefile:17838: recipe for target 'bootstrap' failed
make.exe: *** [bootstrap] Error 2

I have not investigated this further.  The generation of numeric tails for file
names must be enabled to get the zip file extracted in a working fashion.
I do not know if this is worth to be fixed.
Specially I have not tried to build it on DOS 7.0 with a LFN driver.  This would
even more slower than using Win98SE (GUI).


Regards,
Juan M. Guerrero

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