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-rw-r--r--winsup/cygwin/include/fenv.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/winsup/cygwin/include/fenv.h b/winsup/cygwin/include/fenv.h
index b49033f29..497691374 100644
--- a/winsup/cygwin/include/fenv.h
+++ b/winsup/cygwin/include/fenv.h
@@ -11,6 +11,8 @@ details. */
#ifndef _FENV_H_
#define _FENV_H_
+#include <sys/cdefs.h>
+
#ifdef __cplusplus
extern "C" {
#endif
@@ -133,14 +135,14 @@ extern const fenv_t *_fe_dfl_env;
type "pointer to const-qualified fenv_t",may also be specified by
the implementation. */
-#ifdef _GNU_SOURCE
+#if __GNU_VISIBLE
/* If possible, the GNU C Library defines a macro FE_NOMASK_ENV which
represents an environment where every exception raised causes a trap
to occur. You can test for this macro using #ifdef. It is only defined
if _GNU_SOURCE is defined. */
extern const fenv_t *_fe_nomask_env;
#define FE_NOMASK_ENV (_fe_nomask_env)
-#endif /* _GNU_SOURCE */
+#endif /* __GNU_VISIBLE */
/* The following shall be declared as functions and may also be