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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Ruby 1.8.7 (pl174) "make test" fails (floating point) *only* with 
	default CFLAGS -O2
Date: Sun, 27 Sep 2009 12:40:05 -0700 (PDT)
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hey guys,
   I've never written anything in Ruby, but I did for laughs download
latest 1.8.7 source (from 12 June 2009) since 1.9.x doesn't support
DJGPP any more (for various reasons, esp. no maintainer). Mainly I was
just wanting to test still more Befunge93 interpreters (since I
discovered that language recently, heh).     ;-)

http://www.splatbang.com/rubyquiz/quiz.rhtml?id=184_Befunge
http://catseye.tc/projects/bef/
http://board.flatassembler.net/topic.php?t=10599

Anyways, Ruby compiles cleanly after "./configure && make" although
djgpp/configure.bat etc. exists (and doesn't work anymore, AFAICT).
I'm using GCC 4.4.1, DJDEV 2.04, etc.

It's probably a bug or regression in GCC, who knows, but using the
default "-g -O2" CFLAGS, "make test" fails in a few floating point
tests while -O or -Os everything is successful.

=======================================
[ Vista/DJGPP ] - Sun 09/27/2009 >ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [i786-msdosdjgpp]

[ Vista/DJGPP ] - Sun 09/27/2009 >make test
not ok float 1 -- ./sample/test.rb:1226
not ok float 2 -- ./sample/test.rb:1227
not ok float 3 -- ./sample/test.rb:1228
not ok float 4 -- ./sample/test.rb:1229
not ok float 5 -- ./sample/test.rb:1230
not ok float 6 -- ./sample/test.rb:1231
not ok float 7 -- ./sample/test.rb:1232
not ok float 8 -- ./sample/test.rb:1233
not ok float 9 -- ./sample/test.rb:1234
test failed
make.exe: *** [test] Error 1

[ Vista/DJGPP ] - Sun 09/27/2009 >sed 1226,1234!d sample/test.rb
test_ok(2.6.floor == 2)
test_ok((-2.6).floor == -3)
test_ok(2.6.ceil == 3)
test_ok((-2.6).ceil == -2)
test_ok(2.6.truncate == 2)
test_ok((-2.6).truncate == -2)
test_ok(2.6.round == 3)
test_ok((-2.4).truncate == -2)
test_ok((13.4 % 1 - 0.4).abs < 0.0001)

[ Vista/DJGPP ] - Sun 09/27/2009 >grep CFLAGS makefile
CFLAGS = -g -O2 ${cflags}  -DRUBY_EXPORT
LDFLAGS =  $(CFLAGS) -L.
        $(CC) $(CFLAGS) $(CPPFLAGS) -c $<
        $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(OUTFLAG)$@ -c ext/
extinit.c
        $(CC) $(CFLAGS) -c $<
=======================================
[ Vista/DJGPP ] - Sun 09/27/2009 >ruby -v
ruby 1.8.7 (2009-06-12 patchlevel 174) [i786-msdosdjgpp]

[ Vista/DJGPP ] - Sun 09/27/2009 >make test
test succeeded

[ Vista/DJGPP ] - Sun 09/27/2009 >grep CFLAGS makefile
CFLAGS = -s -O ${cflags}  -DRUBY_EXPORT
LDFLAGS =  $(CFLAGS) -L.
        $(CC) $(CFLAGS) $(CPPFLAGS) -c $<
        $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(OUTFLAG)$@ -c ext/
extinit.c
        $(CC) $(CFLAGS) -c $<
=======================================