Handle msvc intrisincs in check_func.

1 files changed, 7 insertions, 0 deletions

diff --git a/numpy/distutils/command/config.py b/numpy/distutils/command/config.py
index bfc3a20e9..b88741e88 100644
--- a/numpy/distutils/command/config.py
+++ b/numpy/distutils/command/config.py
@@ -126,6 +126,13 @@ int main()
         body = []
         if decl:
             body.append("int %s ();" % func)
+        # Handle MSVC intrisincs: force MS compiler to make a function call.
+        # Useful to test for some functions when built with optimization on, to
+        # avoid build error because the intrisinc and our 'fake' test
+        # declaration do not match.
+        body.append("#ifdef _MSC_VER")
+        body.append("#define function(%s)" % func)
+        body.append("#endif")
         body.append("int main (void) {")
         if call:
             if call_args is None: