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51 lines
1.3 KiB
Diff
51 lines
1.3 KiB
Diff
--- a/configure.ac
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+++ b/configure.ac
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@@ -43,12 +43,6 @@
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AC_FUNC_MALLOC
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AC_FUNC_REALLOC
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AC_CHECK_FUNCS(strcasecmp strdup strerror snprintf vsnprintf vasprintf open vsyslog strncasecmp setlocale)
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-AC_CHECK_DECLS([INFINITY], [], [], [[#include <math.h>]])
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-AC_CHECK_DECLS([nan], [], [], [[#include <math.h>]])
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-AC_CHECK_DECLS([isnan], [], [], [[#include <math.h>]])
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-AC_CHECK_DECLS([isinf], [], [], [[#include <math.h>]])
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-AC_CHECK_DECLS([_isnan], [], [], [[#include <float.h>]])
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-AC_CHECK_DECLS([_finite], [], [], [[#include <float.h>]])
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#check if .section.gnu.warning accepts long strings (for __warn_references)
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AC_LANG_PUSH([C])
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--- a/math_compat.h
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+++ b/math_compat.h
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@@ -1,28 +1,9 @@
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#ifndef __math_compat_h
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#define __math_compat_h
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-/* Define isnan and isinf on Windows/MSVC */
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-
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-#ifndef HAVE_DECL_ISNAN
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-# ifdef HAVE_DECL__ISNAN
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-#include <float.h>
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-#define isnan(x) _isnan(x)
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-# endif
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-#endif
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-
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-#ifndef HAVE_DECL_ISINF
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-# ifdef HAVE_DECL__FINITE
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-#include <float.h>
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-#define isinf(x) (!_finite(x))
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-# endif
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-#endif
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-
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-#ifndef HAVE_DECL_NAN
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-#error This platform does not have nan()
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-#endif
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-
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-#ifndef HAVE_DECL_INFINITY
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-#error This platform does not have INFINITY
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-#endif
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+#undef isnan
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+#define isnan(x) __builtin_isnan(x)
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+#undef isinf
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+#define isinf(x) __builtin_isinf(x)
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#endif
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