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[newlib-cygwin] cygwin/math: make isinf functions signed


https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=929be8005ceed50182388ba14dc20317ddeeb7bd

commit 929be8005ceed50182388ba14dc20317ddeeb7bd
Author: Yaakov Selkowitz <yselkowi@redhat.com>
Date:   Fri Apr 1 17:38:17 2016 -0500

    cygwin/math: make isinf functions signed
    
    glibc returns -1 for negative infinity:
    
    http://man7.org/linux/man-pages/man3/isinfl.3.html
    https://sourceware.org/bugzilla/show_bug.cgi?id=15367
    
    Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>

Diff:
---
 winsup/cygwin/math/isinf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/winsup/cygwin/math/isinf.c b/winsup/cygwin/math/isinf.c
index e7d3e26..fd9e299 100644
--- a/winsup/cygwin/math/isinf.c
+++ b/winsup/cygwin/math/isinf.c
@@ -1,18 +1,18 @@
 int
 isinf (double x)
 {
-  return __builtin_isinf (x);
+  return __builtin_isinf_sign (x);
 }
 
 int
 isinff (float x)
 {
-  return __builtin_isinf (x);
+  return __builtin_isinf_sign (x);
 }
 
 int
 isinfl (long double x)
 {
-  return __builtin_isinf (x);
+  return __builtin_isinf_sign (x);
 }


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