Detect whether the current system is a Linux system

[sconvent]

Summary

Detect whether the current system is a Linux system

[Hahnfeld]

GCC has none of these features?! I can't believe that, maybe only some older versions that don't implement OpenMP 4.x?

[sconvent]

Only detect whether the current system is a Linux system. Other feature detection is now done in the testcases.

[sconvent]

@Hahnfeld You're right, GCC does support some of these features. The GOMP interface implementation of this runtime does not support all of them (yet), however. And for some features, GCC generates code that do not call the runtime, which makes it impossible to call callbacks. The feature detection has been moved to the respective testcases and only the "Linux" feature is detected here.

[Hahnfeld]

Reduced like this, I don't think it is necessary to do this in its own revision, especially as there are (currently) no users.

(I was originally only referring to split out INTEL_LICENSE_FILE...)

[jlpeyton]

Also, if you take the features completely out, D38185 will need updating taking out the features in the REQUIRES: lines in the tests.

runtime/test/lit.cfg

if config.has_ompt and config.test_filecheck == "":
     lit_config.note("Not testing OMPT because FileCheck was not found")
     config.has_ompt = False
 
 if config.has_ompt:
     config.available_features.add("ompt")
     # for callback.h
     config.test_cflags += " -I " + config.test_source_root + "/ompt"
 
+if 'Linux' in config.operating_system:
+    config.available_features.add("linux")
+
 # substitutions
 if config.has_ompt:
     config.substitutions.append(("FileCheck", config.test_filecheck))
     config.substitutions.append(("%sort-threads", "sort --numeric-sort --stable"))
 
 config.substitutions.append(("%libomp-compile-and-run", \
     "%libomp-compile && %libomp-run"))
 config.substitutions.append(("%libomp-compile", \
     "%clang %cflags %s -o %t" + libs))
 config.substitutions.append(("%libomp-run", "%t"))
 config.substitutions.append(("%clang", config.test_compiler))
 config.substitutions.append(("%openmp_flag", config.test_openmp_flag))
 config.substitutions.append(("%cflags", config.test_cflags))