[glibc] build-many-glibcs.py: Use make -O for more consistent log output

[glibc] build-many-glibcs.py: Use make -O for more consistent log output

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=418f5783d987ed13fee217d8aad47b8b23b28a87

commit 418f5783d987ed13fee217d8aad47b8b23b28a87
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon Feb 22 09:39:14 2021 +0100

    build-many-glibcs.py: Use make -O for more consistent log output
    
    The -O option avoids interleaving (e.g.) compiler error messages
    with other build messages, and makes attribution of messages to
    commands easier.
    
    According to my tests, the impact on build time is within the noise.

Diff:
---
 scripts/build-many-glibcs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index 071f338cbb..8d97320f6d 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -670,7 +670,7 @@ class Context(object):
 
     def do_build(self):
         """Do the actual build."""
-        cmd = ['make', '-j%d' % self.parallelism]
+        cmd = ['make', '-O', '-j%d' % self.parallelism]
         subprocess.run(cmd, cwd=self.builddir, check=True)
 
     def build_host_libraries(self):