C++ filesystem and link to dl library in test exe (#29)

* Add lib/rocprofiler-register/details/filesystem.hpp

- this provides backwards compatibility for compiler which do not have <filesystem>
  - use <experimental/filesystem> when not available

* Update tests/CMakeLists.txt

- test executables link to dl library (via CMAKE_DL_LIBS)

* Update CI workflow

- include ubuntu-20.04 jobs

source/lib/rocprofiler-register/details/CMakeLists.txt

@@ -3,7 +3,8 @@
 #
 set(rocprofiler_register_details_sources dl.cpp utility.cpp)
 
-set(rocprofiler_register_details_headers environment.hpp dl.hpp utility.hpp)
+set(rocprofiler_register_details_headers environment.hpp dl.hpp filesystem.hpp
+                                         utility.hpp)
 
 target_sources(rocprofiler-register PRIVATE ${rocprofiler_register_details_sources}
                                             ${rocprofiler_register_details_headers})

source/lib/rocprofiler-register/details/dl.cpp

@@ -23,9 +23,9 @@
 #define GNU_SOURCE 1
 
 #include "dl.hpp"
+#include "filesystem.hpp"
 #include "utility.hpp"
 
-#include <filesystem>
 #include <fstream>
 #include <optional>
 #include <string>
@@ -38,8 +38,6 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-namespace fs = ::std::filesystem;
-
 namespace rocprofiler_register
 {
 namespace binary

source/lib/rocprofiler-register/details/filesystem.hpp

@@ -0,0 +1,48 @@
+// MIT License
+//
+// Copyright (c) 2022 Advanced Micro Devices, Inc. All Rights Reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#pragma once
+
+#if defined __has_include
+#    if __has_include(<version>)
+#        include <version>
+#    endif
+#endif
+
+#if defined(__cpp_lib_filesystem)
+#    define ROCPROFILER_REGISTER_HAS_CPP_LIB_FILESYSTEM 1
+#else
+#    if defined __has_include
+#        if __has_include(<filesystem>)
+#            include <filesystem>
+#        endif
+#    endif
+#endif
+
+#if defined(ROCPROFILER_REGISTER_HAS_CPP_LIB_FILESYSTEM) &&                              \
+    ROCPROFILER_REGISTER_HAS_CPP_LIB_FILESYSTEM > 0
+#    include <filesystem>
+namespace fs = ::std::filesystem;  // NOLINT
+#else
+#    include <experimental/filesystem>
+namespace fs = ::std::experimental::filesystem;  // NOLINT
+#endif

source/lib/rocprofiler-register/rocprofiler_register.cpp

@@ -24,12 +24,12 @@
 
 #include "details/dl.hpp"
 #include "details/environment.hpp"
+#include "details/filesystem.hpp"
 #include "glog/logging.h"
 
 #include <array>
 #include <atomic>
 #include <bitset>
-#include <filesystem>
 #include <mutex>
 #include <regex>
 #include <stdexcept>
@@ -75,7 +75,6 @@ rocprofiler_register_import_roctx_static(void);
 
 namespace
 {
-namespace fs = ::std::filesystem;
 using namespace rocprofiler_register;
 using rocprofiler_set_api_table_t = decltype(::rocprofiler_set_api_table)*;
 using bitset_t = std::bitset<sizeof(rocprofiler_register_library_indentifier_t::handle)>;