Standalone build examples + testing workflow updates (#15)

* Update examples to support standalone builds

* Tweak to ubuntu-focal-external workflow

- disable PAPI

* ubuntu focal external workflow update

- GCC 11
- Test static libgcc + static libstdcxx + strip
- ubuntu-toolchain-r/test

* Improve build-release.sh

- command line args for lto, strip, perfetto-tools,
   static-libgcc, static-libstdcxx, hidden-visibility,
   max-threads, parallel

* Update VERSION to 1.0.1

* Fixes to LTO build

* Updates to ubuntu-focal-external workflow

* build-release.sh update

- enable static libstdcxx by default

* disable python + static libstdcxx

* ubuntu-focal-external updates

* build-release.sh disable static libstdcxx by default

* cmake-format

examples/openmp/CMakeLists.txt

@@ -1,6 +1,6 @@
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+cmake_minimum_required(VERSION 3.16 FATAL_ERROR)
+
+project(omnitrace-openmp LANGUAGES CXX)
 
 file(GLOB common_source ${CMAKE_CURRENT_SOURCE_DIR}/common/*.cpp)
 add_library(openmp-common OBJECT ${common_source})
@@ -11,20 +11,31 @@ add_executable(openmp-cg ${CMAKE_CURRENT_SOURCE_DIR}/CG/cg.cpp
 add_executable(openmp-lu ${CMAKE_CURRENT_SOURCE_DIR}/LU/lu.cpp
                          $<TARGET_OBJECTS:openmp-common>)
 
-find_program(CLANGXX_EXECUTABLE NAMES clang++)
-find_library(
-    LIBOMP_LIBRARY
-    NAMES omp omp5 ${CMAKE_SHARED_LIBRARY_PREFIX}omp${CMAKE_SHARED_LIBRARY_SUFFIX}.5)
-if(CLANGXX_EXECUTABLE AND LIBOMP_LIBRARY)
-    target_compile_options(openmp-common PUBLIC -W -Wall -fopenmp=libomp)
-    target_compile_options(openmp-cg PRIVATE -W -Wall -fopenmp=libomp)
-    target_link_libraries(openmp-cg PRIVATE ${LIBOMP_LIBRARY})
-    target_compile_options(openmp-lu PRIVATE -W -Wall -fopenmp=libomp)
-    target_link_libraries(openmp-lu PRIVATE ${LIBOMP_LIBRARY})
-    omnitrace_custom_compilation(COMPILER ${CLANGXX_EXECUTABLE} TARGET openmp-common)
-    omnitrace_custom_compilation(COMPILER ${CLANGXX_EXECUTABLE} TARGET openmp-cg)
-    omnitrace_custom_compilation(COMPILER ${CLANGXX_EXECUTABLE} TARGET openmp-lu)
-else()
+if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     find_package(OpenMP REQUIRED)
     target_link_libraries(openmp-common PUBLIC OpenMP::OpenMP_CXX)
+else()
+    find_program(CLANGXX_EXECUTABLE NAMES clang++)
+    find_library(
+        LIBOMP_LIBRARY
+        NAMES omp omp5 ${CMAKE_SHARED_LIBRARY_PREFIX}omp${CMAKE_SHARED_LIBRARY_SUFFIX}.5)
+    if(CLANGXX_EXECUTABLE
+       AND LIBOMP_LIBRARY
+       AND COMMAND omnitrace_custom_compilation)
+        target_compile_options(openmp-common PUBLIC -W -Wall -fopenmp=libomp)
+        target_compile_options(openmp-cg PRIVATE -W -Wall -fopenmp=libomp)
+        target_link_libraries(openmp-cg PRIVATE ${LIBOMP_LIBRARY})
+        target_compile_options(openmp-lu PRIVATE -W -Wall -fopenmp=libomp)
+        target_link_libraries(openmp-lu PRIVATE ${LIBOMP_LIBRARY})
+        omnitrace_custom_compilation(COMPILER ${CLANGXX_EXECUTABLE} TARGET openmp-common)
+        omnitrace_custom_compilation(COMPILER ${CLANGXX_EXECUTABLE} TARGET openmp-cg)
+        omnitrace_custom_compilation(COMPILER ${CLANGXX_EXECUTABLE} TARGET openmp-lu)
+    else()
+        find_package(OpenMP REQUIRED)
+        target_link_libraries(openmp-common PUBLIC OpenMP::OpenMP_CXX)
+    endif()
+endif()
+
+if(NOT CMAKE_PROJECT_NAME STREQUAL "omnitrace")
+    install(TARGETS openmp-cg openmp-lu DESTINATION bin)
 endif()