fixing exercise 10

content/code/10_taskloop/CMakeLists.txt

@@ -0,0 +1,12 @@
+# set minimum cmake version
+cmake_minimum_required(VERSION 3.18)
+
+# project name and language
+project(taskloop LANGUAGES CXX)
+
+add_executable(taskloop taskloop.cpp)
+
+# FIXME find the suitable OpenMP component
+
+# FIXME link with imported target
+target_link_libraries(taskloop ...)

content/code/10_taskloop/taskloop.cpp

@@ -0,0 +1,36 @@
+// example adapted from
+// http://www.openmp.org/wp-content/uploads/openmp-examples-4.5.0.pdf page 85
+
+#include <cstdlib>
+#include <iostream>
+
+void long_running_task(){
+  // do something
+  std::cout << "long_running_task" << std::endl; 
+};
+
+void loop_body(int i, int j){
+  // do something
+  std::cout << "i = " << i << " j = " << j << std::endl; 
+};
+
+void parallel_work() {
+  int i, j;
+#pragma omp taskgroup
+  {
+#pragma omp task
+    long_running_task(); // can execute concurrently
+
+#pragma omp taskloop private(j) grainsize(500) nogroup
+    for (i = 0; i < 100; i++) { // can execute concurrently
+      for (j = 0; j < i; j++) {
+        loop_body(i, j);
+      }
+    }
+  }
+}
+
+int main() {
+  parallel_work();
+  return EXIT_SUCCESS;
+}

content/dependencies.rst

@@ -96,11 +96,11 @@ A complete list of ``Find<PackageName>.cmake`` can be found from the command-lin
 
    $ cmake --help-module-list | grep "Find"
 
-.. typealong:: Using OpenMP
+.. exercise:: Exercise 10: Using OpenMP
 
    We want to compile the following OpenMP sample code: [#omp]_
 
-   .. literalinclude:: code/09_taskloop/solution/taskloop.cpp
+   .. literalinclude:: code/10_taskloop/taskloop.cpp
       :language: c++
 
    Note the usage of the ``taskloop`` construct, which was introduced in OpenMP
@@ -116,18 +116,13 @@ A complete list of ``Find<PackageName>.cmake`` can be found from the command-lin
    we find that the module provides the components ``C``, ``CXX``, and
    ``Fortran`` and that ``OpenMP::OpenMP_CXX`` target will be provided, if
    detection is successful.
-   Thus, we do the following:
-
-   .. code-block:: cmake
-
-      find_package(OpenMP 4.5 REQUIRED COMPONENTS CXX)
-
-      target_link_libraries(task-loop PRIVATE OpenMP::OpenMP_CXX)
+   The scaffold project is in ``content/code/10_taskloop``. You will need to
+   find the suitable OpenMP libary and link against the imported target.
 
    We can configure and build verbosely. [#verbose]_
    Notice that compiler flags, include directories, and link libraries are properly resolved by CMake.
 
-   You can find the complete working example in ``content/code/10_taskloop/solution``.
+   You can find the complete working example in the ``solution`` subfolder.
 
 .. exercise:: Exercise 11: Using MPI