[OMPT] Fix failing test cases for gcc on Ubuntu

[protze.joachim]

Summary

The compiler warns that _BSD_SOURCE is deprecated and _DEFAULT_SOURCE should be used instead. We keep _BSD_SOURCE for older compilers, that don't know about _DEFAULT_SOURCE.

The linker drops the tool when linking. So we need to tell the linker, that the tool should be linked anyway.

[Hahnfeld]

Makes sense.

openmp/trunk/runtime/test/ompt/callback.h

 #define _BSD_SOURCE
+#define _DEFAULT_SOURCE
 #include <stdio.h>
 #include <inttypes.h>
 #include <omp.h>
 #include <ompt.h>
 #include "ompt-signal.h"
 
 // Used to detect architecture
 #include "../../src/kmp_platform.h"

openmp/trunk/runtime/test/ompt/loadtool/tool_available.c

 // The OpenMP standard defines 3 ways of providing ompt_start_tool:
 // 1. "statically-linking the tool’s definition of ompt_start_tool into an OpenMP application"
 // RUN: %libomp-compile -DCODE -DTOOL && %libomp-run | FileCheck %s
 
 // Note: We should compile the tool without -fopenmp as other tools developer
 //       would do. Otherwise this test may pass for the wrong reasons on Darwin.
 // RUN: %clang %flags -DTOOL -shared -fPIC %s -o %T/tool.so
 // 2. "introducing a dynamically-linked library that includes the tool’s definition of ompt_start_tool into the application’s address space"
 // 2.1 Link with tool during compilation
-// RUN: %libomp-compile -DCODE %T/tool.so && %libomp-run | FileCheck %s
+// RUN: %libomp-compile -DCODE -Wl,--no-as-needed %T/tool.so && %libomp-run | FileCheck %s
 // 2.2 Link with tool during compilation, but AFTER the runtime
-// RUN: %libomp-compile -DCODE -lomp %T/tool.so && %libomp-run | FileCheck %s
+// RUN: %libomp-compile -DCODE -lomp -Wl,--no-as-needed %T/tool.so && %libomp-run | FileCheck %s
 // 2.3 Inject tool via the dynamic loader
 // RUN: %libomp-compile -DCODE && %preload-tool %libomp-run | FileCheck %s
 
 // 3. "providing the name of a dynamically-linked library appropriate for the architecture and operating system used by the application in the tool-libraries-var ICV"
 // RUN: %libomp-compile -DCODE && env OMP_TOOL_LIBRARIES=%T/tool.so %libomp-run | FileCheck %s
 
 // REQUIRES: ompt