orion cmake configuration fails when CMAKE_C_COMPILED_ID is not set [OI-1869]

[armallen]

Jira Ticket

https://swift-nav.atlassian.net/browse/OI-1869

Bug description

orion build fails with

CMake Error at third_party/orion-engine/third_party/auk/cmake/swift_nav/LanguageStandards.cmake:63 (if):
  if given arguments:

    "STREQUAL" "IAR"

  Unknown arguments specified
Call Stack (most recent call first):
  third_party/orion-engine/third_party/auk/cmake/swift_nav/SwiftTargets.cmake:351 (swift_set_language_standards)
  third_party/orion-engine/third_party/auk/cmake/swift_nav/SwiftTargets.cmake:373 (swift_add_target)
  proto/CMakeLists.txt:29 (swift_add_library)

CMake syntax allows using the variable without ${} to simultaneously check if variable is defined, and variable content.

Testing

Updated third_party/orion-engine/third_party/auk/cmake/swift_nav/LanguageStandards.cmake locally with the fix, CMake config runs correctly.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud