Add check for C99 macros related IEEE-754.

1 files changed, 12 insertions, 0 deletions

diff --git a/numpy/core/SConscript b/numpy/core/SConscript
index 71cee7023..986963846 100644
--- a/numpy/core/SConscript
+++ b/numpy/core/SConscript
@@ -174,6 +174,18 @@ for prec in ['l', 'f']:
     fns = [f + prec for f in c99_funcs]
     check_funcs(fns)
 
+# Normally, isnan and isinf are macro (C99), but some platforms only have
+# func, or both func and macro version. Check for macro only, and define
+# replacement ones if not found.
+# Note: including Python.h is necessary because it modifies some math.h
+# definitions
+for f in ["isnan", "isinf", "signbit", "isfinite"]:
+    includes = """\
+#include <Python.h>
+#include <math.h>
+"""
+    config.CheckDeclaration(f, includes=includes)
+
 def check_func(f):
     """Check that f is available in mlib, and add the symbol appropriately.  """
     st = config.CheckDeclaration(f, language = 'C', includes = "#include <math.h>")