git: 76713be0f593 - stable/13 - Avoid double output in fenv_test

[Alex Richardson]

The branch stable/13 has been updated by arichardson:

URL: https://cgit.FreeBSD.org/src/commit/?id=76713be0f593d7b6cea0696024b804888a61547a

commit 76713be0f593d7b6cea0696024b804888a61547a
Author:     Alex Richardson <arichardson at FreeBSD.org>
AuthorDate: 2021-01-29 09:29:26 +0000
Commit:     Alex Richardson <arichardson at FreeBSD.org>
CommitDate: 2021-04-22 09:40:42 +0000

    Avoid double output in fenv_test
    
    This tests fork()s, so if there is still data in the stdout buffer on fork
    it will print it again in the child process. This was happening in the
    CheriBSD CI and caused the test to complain about malformed TAP output.
    
    Reviewed By:    ngie
    Differential Revision: https://reviews.freebsd.org/D28397
    
    (cherry picked from commit 892a05ee3a6abd8d84f46a1b895b1d2bf805d08a)
---
 lib/msun/tests/fenv_test.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/msun/tests/fenv_test.c b/lib/msun/tests/fenv_test.c
index 9b615b100e8a..62abfefb4a8a 100644
--- a/lib/msun/tests/fenv_test.c
+++ b/lib/msun/tests/fenv_test.c
@@ -539,6 +539,8 @@ test_feholdupdate(void)
 int
 main(void)
 {
+	/* Avoid double output after fork() */
+	setvbuf(stdout, NULL, _IONBF, 0);
 
 	printf("1..8\n");
 	init_exceptsets();