aarch64: Export fe{enable,disable,get}except on Cygwin

For aarch64 on ELF targets, the library does not export
fe{enable,disable,get}except as symbols from the library, relying on
static inline functions to provide suitable definitions if required.
But for Cygwin we need to create real definitions to satisfy the DLL
export script.

So arrange for real definitions of these functions when building on Cygwin.

Signed-off-by: Radek Bartoň <radek.barton@microsoft.com>

1 files changed, 12 insertions, 4 deletions

diff --git a/newlib/libc/machine/aarch64/sys/fenv.h b/newlib/libc/machine/aarch64/sys/fenv.h
index 6b08792..1f97791 100644
--- a/newlib/libc/machine/aarch64/sys/fenv.h
+++ b/newlib/libc/machine/aarch64/sys/fenv.h
@@ -80,9 +80,17 @@ extern const fenv_t	*_fe_dfl_env;
 
 #if __BSD_VISIBLE
 
-/* We currently provide no external definitions of the functions below. */
+/* We currently provide no external definitions of the functions below
+   except of for Cygwin where those functions are exported by
+   winsup/cygwin/cygwin.din. */
+
+#ifdef __CYGWIN__
+#define __cygwin_fenv_static __fenv_static
+#else
+#define __cygwin_fenv_static static
+#endif
 
-static inline int
+__cygwin_fenv_static inline int
 feenableexcept(int __mask)
 {
 	fenv_t __old_r, __new_r;
@@ -93,7 +101,7 @@ feenableexcept(int __mask)
 	return ((__old_r >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
 }
 
-static inline int
+__cygwin_fenv_static inline int
 fedisableexcept(int __mask)
 {
 	fenv_t __old_r, __new_r;
@@ -104,7 +112,7 @@ fedisableexcept(int __mask)
 	return ((__old_r >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
 }
 
-static inline int
+__cygwin_fenv_static inline int
 fegetexcept(void)
 {
 	fenv_t __r;