[PROTON-1974] Libraries are not being correctly detected in CMake build scripts when old CMake is used

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: proton-c-0.25.0, proton-c-0.26.0
• Fix Version/s: proton-c-0.27.0
• Component/s: build, proton-c
• Environment: RHEL 7, CMake 2.8.12.2
• Flags: Patch
• Assignee: Andrew Stitcher
• Reporter: Jiri Daněk
• Created: 27/Nov/18 21:55
• Updated: 02/Mar/19 23:35
• Resolved: 29/Nov/18 23:24

Description

On CMake 2.8.12.2, function find_package_handle_standard_args sets (by default) only the <PACKAGENAME>_FOUND variable. With newer versions, such as 3.12.1, both the uppercased, as well as the unmodified <PackageName>_FOUND are set. Proton examines the unmodified variable.

As a result, with older CMake, optional libraries such as Cyrus SASL are detected by CMake, but then are not used by proton-c, as if they were not present on the system.