Add missing `extern` declaration for the `module_is_main` flag

4f636ed6 · Lisandro Dalcin · 0992c63e · 4f636ed6
Commit 4f636ed6 authored Oct 27, 2017 by Lisandro Dalcin
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Cython/Compiler/ModuleNode.py Cython/Compiler/ModuleNode.py +3 -1

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--- a/Cython/Compiler/ModuleNode.py
+++ b/Cython/Compiler/ModuleNode.py
@@ -358,7 +358,9 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):

        code = globalstate['before_global_var']
        code.putln('#define __Pyx_MODULE_NAME "%s"' % self.full_module_name)
-        code.putln("int %s%s = 0;" % (Naming.module_is_main, self.full_module_name.replace('.', '__')))
+        module_is_main = "%s%s" % (Naming.module_is_main, self.full_module_name.replace('.', '__'))
+        code.putln("extern int %s;" % module_is_main)
+        code.putln("int %s = 0;" % module_is_main)
        code.putln("")
        code.putln("/* Implementation of '%s' */" % env.qualified_name)