add initial example integration with cmake (#149)

src/c/CMakeLists.txt

@@ -43,6 +43,7 @@ add_subdirectory(parser)
 add_subdirectory(runtime)
 add_subdirectory(weaver)
 add_subdirectory(test)
+add_subdirectory(examples)
 
 add_library(perfflowaspect INTERFACE)
 target_link_libraries(perfflowaspect INTERFACE perfflow_runtime perfflow_parser WeavePassPlugin)

src/c/config/perfflowaspect-config.cmake.in

@@ -1,15 +1,15 @@
 if (NOT PERFFLOWASPECT_CONFIG_LOADED)
-  set(PERFFLOWASPECT_VERSION        "@PROJECT_VERSION@")
-  set(PERFFLOWASPECT_INSTALL_PREFIX "@CMAKE_INSTALL_PREFIX@")
-  set(PERFFLOWASPECT_LIB_DIR        "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@")
+  set(PERFFLOWASPECT_VERSION "@PROJECT_VERSION@")
+  set(PERFFLOWASPECT_DIR     "@CMAKE_INSTALL_PREFIX@")
+  set(PERFFLOWASPECT_LIB_DIR "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@")
 
   include(CMakeFindDependencyMacro)
 
   find_dependency(OpenSSL REQUIRED)
 
   # Library targets imported from file
-  # include(${PERFFLOWASPECT_INSTALL_PREFIX}/share/perfflowaspect_setup_targets.cmake)
-  include(${PERFFLOWASPECT_INSTALL_PREFIX}/share/perfflowaspect_targets.cmake)
+  # include(${PERFFLOWASPECT_DIR}/share/perfflowaspect_setup_targets.cmake)
+  include(${PERFFLOWASPECT_DIR}/share/perfflowaspect_targets.cmake)
 
   set(PERFFLOWASPECT_CONFIG_LOADED TRUE)
 endif()

src/c/examples/CMakeLists.txt

@@ -0,0 +1,2 @@
+install(DIRECTORY using-with-cmake
+        DESTINATION examples)

src/c/examples/using-with-cmake/CMakeLists.txt

@@ -0,0 +1,41 @@
+###############################################################################
+# Example that shows how to use an installed instance of PerfFlowAspect in 
+# another CMake-based build system.
+#
+# To build:
+#   mkdir build
+#   cd build
+#   cmake -DPERFFLOWASPECT_DIR={perfflowaspect install path} ../
+#   make
+#   ./smoketest
+#
+# If run in-sub directory below using-with-cmake in a PerfFlowAspect install,
+# PERFFLOWASPECT_DIR will be defaulted to ../../..
+#
+#   mkdir build
+#   cd build
+#   cmake ..
+#   make
+#   ./smoketest
+###############################################################################
+
+cmake_minimum_required(VERSION 3.0)
+
+project(using_with_cmake)
+
+#
+# Provide default for PERFFLOWASPECT_DIR that works for an PerfFlowAspect install
+#
+if(NOT PERFFLOWASPECT_DIR)
+    set(PERFFLOWASPECT_DIR "../..")
+endif()
+
+#
+# Check for valid PerfFlowAspect install
+#
+get_filename_component(PERFFLOWASPECT_DIR ${PERFFLOWASPECT_DIR} ABSOLUTE)
+if(NOT EXISTS ${PERFFLOWASPECT_DIR}/share/perfflowaspect-config.cmake)
+    message(FATAL_ERROR "Could not find PerfFlowAspect CMake include file (${PERFFLOWASPECT_DIR}/share/perfflowaspect-config.cmake)")
+endif()
+
+#

src/c/examples/using-with-cmake/smoketest.cpp

@@ -0,0 +1,54 @@
+/************************************************************\
+ * Copyright 2021 Lawrence Livermore National Security, LLC
+ * (c.f. AUTHORS, NOTICE.LLNS, COPYING)
+ *
+ * This file is part of the Flux resource manager framework.
+ * For details, see https://github.com/flux-framework.
+ *
+ * SPDX-License-Identifier: LGPL-3.0
+\************************************************************/
+
+#include <cstdio>
+#include <string>
+#include <unistd.h>
+
+__attribute__((annotate("@critical_path(pointcut='around')")))
+void bas()
+{
+    printf("bas\n");
+}
+
+__attribute__((annotate("@critical_path(pointcut='around')")))
+void bar()
+{
+    printf("bar\n");
+    usleep(1000);
+    bas();
+}
+
+__attribute__((annotate("@critical_path()")))
+int foo(const std::string &str)
+{
+    printf("foo\n");
+    usleep(1000);
+    bar();
+    if (str == "hello")
+    {
+        return 1;
+    }
+    return 0;
+}
+
+int main(int argc, char *argv[])
+{
+    printf("Inside main\n");
+    for (int i = 0; i < 4; i++)
+    {
+        foo("hello");
+    }
+    return 0;
+}
+
+/*
+ * vi:tabstop=4 shiftwidth=4 expandtab
+ */