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-rw-r--r--Library/Homebrew/extend/ENV/super.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 6c05bddb4..ce8de00d0 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -52,6 +52,10 @@ module Superenv
delete('CDPATH') # avoid make issues that depend on changing directories
delete('GREP_OPTIONS') # can break CMake
delete('CLICOLOR_FORCE') # autotools doesn't like this
+
+ # Configure scripts generated by autoconf 2.56 or later export DUALCASE,
+ # which we use as a heuristic for running under configure
+ delete('DUALCASE')
end
def setup_build_environment(formula=nil)