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Bug 1510397 - Compiler atomic built-ins are not correctly detected
Summary: Compiler atomic built-ins are not correctly detected
Alias: None
Product: GlusterFS
Classification: Community
Component: build
Version: mainline
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Xavi Hernandez
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2017-11-07 10:14 UTC by Xavi Hernandez
Modified: 2018-03-15 11:20 UTC (History)
2 users (show)

Fixed In Version: glusterfs-4.0.0
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2018-03-15 11:20:03 UTC
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:

Attachments (Terms of Use)

Description Xavi Hernandez 2017-11-07 10:14:22 UTC
Description of problem:

__sync and __atomic built-ins are not correctly detected by

Version-Release number of selected component (if applicable):

How reproducible: Always

Steps to Reproduce:
1. ./ && ./configure

Actual results:

Macros HAVE_ATOMIC_BUILTINS and HAVE_SYNC_BUILTINS in config.h are not defined, compiling all the code using mutexes instead of atomic operations.

Expected results:

Those macros should be defined if compiler supports them.

Additional info:

Comment 2 Worker Ant 2017-11-07 12:55:14 UTC
REVIEW: (libglusterfs/atomic: Improved atomic support) posted (#1) for review on master by Xavier Hernandez

Comment 4 Worker Ant 2017-11-14 05:22:32 UTC
COMMIT: committed in master by \"Xavier Hernandez\" <> with a commit message- libglusterfs/atomic: Improved atomic support

This patch solves a detection problem in that prevented
that compilation detects builtin __atomic or __sync functions.

It also adds more atomic types and support for other atomic functions.

An special case has been added to support 64-bit atomics on 32-bit
systems. The solution is to fallback to the mutex solution only for
64-bit atomics, but smaller atomic types will still take advantage
of builtins if available.

Change-Id: I6b9afc7cd6e66b28a33278715583552872278801
BUG: 1510397
Signed-off-by: Xavier Hernandez <>

Comment 5 Shyamsundar 2018-03-15 11:20:03 UTC
This bug is getting closed because a release has been made available that should address the reported issue. In case the problem is still not fixed with glusterfs-4.0.0, please open a new bug report.

glusterfs-4.0.0 has been announced on the Gluster mailinglists [1], packages for several distributions should become available in the near future. Keep an eye on the Gluster Users mailinglist [2] and the update infrastructure for your distribution.


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