https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108836
Bug ID: 108836
Summary: std::mutex disappears in single-threaded libstdc++
builds
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: pdimov at gmail dot com
Target Milestone: ---
We've been getting reports in Boost that our uses of <mutex> and std::mutex
don't work in a single-threaded build of libstdc++, so we had to add
configuration macros to avoid these issues. One example is
https://github.com/boostorg/system/commit/53c00841fc0d892bf43cda60e3ea2f05c4362b32,
another https://github.com/boostorg/url/issues/684.
Is there a reason not to make std::mutex available in single threaded builds,
with its operations being no-ops?
