[newlib-cygwin] common/math_errf.c: Enable compilation of __math_oflowf

[newlib-cygwin] common/math_errf.c: Enable compilation of __math_oflowf

[Joel Sherrill]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=3e5302714fae99acc8c439f5870846312d081631

commit 3e5302714fae99acc8c439f5870846312d081631
Author: Joel Sherrill <joel@rtems.org>
Date:   Fri Jul 26 14:37:23 2019 -0500

    common/math_errf.c: Enable compilation of __math_oflowf
    
    	This resolved linking errors when using methods such as
    	expm1().

Diff:
---
 newlib/libm/common/math_errf.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/newlib/libm/common/math_errf.c b/newlib/libm/common/math_errf.c
index e050cdb..762fc27 100644
--- a/newlib/libm/common/math_errf.c
+++ b/newlib/libm/common/math_errf.c
@@ -27,8 +27,6 @@
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 
 #include "fdlibm.h"
-#if !__OBSOLETE_MATH
-
 #include "math_config.h"
 
 #if WANT_ERRNO
@@ -53,6 +51,7 @@ xflowf (uint32_t sign, float y)
   return with_errnof (y, ERANGE);
 }
 
+#if !__OBSOLETE_MATH
 HIDDEN float
 __math_uflowf (uint32_t sign)
 {
@@ -68,6 +67,7 @@ __math_may_uflowf (uint32_t sign)
   return xflowf (sign, 0x1.4p-75f);
 }
 #endif
+#endif /* !__OBSOLETE_MATH */
 
 HIDDEN float
 __math_oflowf (uint32_t sign)
@@ -75,6 +75,7 @@ __math_oflowf (uint32_t sign)
   return xflowf (sign, 0x1p97f);
 }
 
+#if !__OBSOLETE_MATH
 HIDDEN float
 __math_divzerof (uint32_t sign)
 {