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authorJoseph Myers <joseph@codesourcery.com>2017-08-21 21:43:32 +0000
committerJoseph Myers <joseph@codesourcery.com>2017-08-21 21:43:32 +0000
commitea99fcd03875caf59ceda354ec8ed813bb5a5f79 (patch)
tree558164d63a8b30ea49b0735ece07992ed5233bf6
parenta8410a5fc9305c316633a5a3033f3927b759be35 (diff)
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Fix GCC 7 build of k_standard.c.
This patch adds a default case to k_standard.c that calls __builtin_unreachable, to avoid an uninitialized variable error from GCC 7 (reported in <https://sourceware.org/ml/libc-alpha/2017-08/msg01012.html>). Tested for x86_64 (with GCC 7). * sysdeps/ieee754/k_standard.c (__kernel_standard): Add default case calling __builtin_unreachable.
-rw-r--r--ChangeLog5
-rw-r--r--sysdeps/ieee754/k_standard.c3
2 files changed, 8 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 3d2afd9..bf3e893 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-08-21 Joseph Myers <joseph@codesourcery.com>
+
+ * sysdeps/ieee754/k_standard.c (__kernel_standard): Add default
+ case calling __builtin_unreachable.
+
2017-08-21 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* libio/ioopen.c (_IO_waitpid): Replace waitpid_not_cancel with
diff --git a/sysdeps/ieee754/k_standard.c b/sysdeps/ieee754/k_standard.c
index 0a0201f..8f906bd 100644
--- a/sysdeps/ieee754/k_standard.c
+++ b/sysdeps/ieee754/k_standard.c
@@ -939,6 +939,9 @@ __kernel_standard(double x, double y, int type)
break;
/* #### Last used is 50/150/250 ### */
+
+ default:
+ __builtin_unreachable ();
}
return exc.retval;
}