Building for AArch64 fails due to "strict-aliasing" , "maybe-uninitialized" & "stringop-truncation" errors

[Antonios-C]

When building the CTS repo for a AArch64 platform, the build failed due to 3 types of warnings, that turned into errors (-Werror enablement in CMakeLists.txt).

Example "strict-aliasing":

../test_conformance/basic/test_numeric_constants.cpp:529:154: error: dereferencing type-punned pointer will break strict-aliasing rules [-Werror=strict-aliasing]
  529 | #define TEST_FLOAT_ASSERTION( a, msg, f ) if( !( a ) ) { log_error( "ERROR: Float constant failed requirement: %s (bitwise value is 0x%8.8x)\n", msg, *( (uint32_t *)&f ) ); return -1; }
      |                                                                                                                                                        ~~^~~~~~~~~~~~~~~~
../test_conformance/basic/test_numeric_constants.cpp:574:9: note: in expansion of macro 'TEST_FLOAT_ASSERTION'
  574 |         TEST_FLOAT_ASSERTION( intOut[0] == 0, "isinf( MAXFLOAT ) = false", floatOut[0] )
      |         ^~~~~~~~~~~~~~~~~~~~

Example "stringop-truncation":

../test_conformance/contractions/contractions.cpp:368:16: error: 'char* strncpy(char*, const char*, size_t)' specified bound 4096 equals destination size [-Werror=stringop-truncation]
  368 |         strncpy( appName, argv[0], MAXPATHLEN );
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../test_conformance/contractions/contractions.cpp:373:16: error: 'char* strncpy(char*, const char*, size_t)' specified bound 4096 equals destination size [-Werror=stringop-truncation]
  373 |         strncpy( baseName, argv[0], MAXPATHLEN );
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Examples "maybe-uninitialized":

• ../test_common/harness/imageHelpers.cpp:3564:56: error: 'src_lod' may be used uninitialized [-Werror=maybe-uninitialized]
• ../test_common/harness/imageHelpers.cpp:3610:56: error: 'dst_lod' may be used uninitialized [-Werror=maybe-uninitialized]
• ../test_conformance/api/test_wg_suggested_local_work_size.cpp:276:12: error: 'err' may be used uninitialized [-Werror=maybe-uninitialized]

[svenvh]

Thanks for the report! Do you have more details on the compiler version you're using?

[Antonios-C]

Hi there !

The compiler version is 13.3.

Currently working on fixing the warnings, will make a pull request this week.