* lib/mkmf.rb: use null device if it exists for cross-compiling.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@808 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 1f9373a225..d09b85b875 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -33,11 +33,15 @@ if RUBY_PLATFORM == "m68k-human"
 elsif RUBY_PLATFORM =~ /-nextstep|-rhapsody/
   CFLAGS.gsub!( /-arch\s\w*/, '' )
 end
-if /win32|djgpp|mingw32|m68k-human|i386-os2_emx/i =~ RUBY_PLATFORM
-  $null = open("nul", "w")
+
+if FileTest.readable? 'nul'
+  $null = open('nul', 'w')
+elsif FileTest.readable? '/dev/null'
+  $null = open('/dev/null', 'w')
 else
-  $null = open("/dev/null", "w")
+  $null = open('test.log', 'w')
 end
+
 LINK = "#{CONFIG['CC']} -o conftest -I#{$hdrdir} #{CFLAGS} -I#{CONFIG['includedir']} %s #{CONFIG['LDFLAGS']} %s conftest.c %s %s #{CONFIG['LIBS']}"
 CPP = "#{CONFIG['CPP']} -E -I#{$hdrdir} #{CFLAGS} -I#{CONFIG['includedir']} %s %s conftest.c"