python25: build with -fwrapv

Fixes #7. Signed-off-by: Jack Nagel <[email protected]>
alexjs · May 16, 2012 · 551398b · 551398b
1 parent 5489ec4
commit 551398b
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/python25.rb b/python25.rb
@@ -85,6 +85,12 @@ def validate_options
   end
 
   def install
+    # Python 2.5-2.7 requires -fwrapv for proper Decimal division with Clang. See:
+    # https://github.com/mxcl/homebrew/pull/10487
+    # http://stackoverflow.com/questions/7590137/dividing-decimals-yields-invalid-results-in-python-2-5-to-2-7
+    # https://trac.macports.org/changeset/87442
+    ENV.append 'EXTRA_CFLAGS', '-fwrapv'
+
     validate_options
 
     args = ["--prefix=#{prefix}"]