Changes in version 3.15.1:

• Fix overflow in sendfile stubs (copy of large files could fail or end with truncated files) (#10333)
• Fix crash when a rule with a directory target is disabled with enabled_if (#10382, fixes #10310)
• melange: remove all restrictions around virtual libraries in Melange. They may be used as otherwise in libraries and executables. (#10412)
• spawn: fix compatibility with RHEL7 (#10428)

Changes in version 3.15.2:

• If no directory targets are defined, then do not evaluate enabled_if (#10442)
• Fix a bug where Coq projects were being rebuilt from scratch each time the dependency graph changed. (#10446, fixes #10149)