require CMake version 3.16

unittest/CMakeLists.txt

@@ -1,10 +1,9 @@
-########################################
-# CMake build for automated testing
+# -*- CMake -*- build file for automated testing
 # This file is part of LAMMPS
 # Created by Axel Kohlmeyer and Richard Berger
 ########################################
-# download and build googletest framework
 
+# download and build googletest framework
 # cannot compile googletest anymore with the default GCC on RHEL 7.x
 if((CMAKE_CXX_COMPILER_ID STREQUAL "GNU") AND (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0))
   message(FATAL_ERROR "Need GNU C++ compiler version 6.x or later for unit testing")

unittest/c-library/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for testing the c-library interface
 
 add_executable(test_library_open test_library_open.cpp test_main.cpp)
 target_link_libraries(test_library_open PRIVATE lammps GTest::GMock)

unittest/commands/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for testing LAMMPS commands
 
 add_executable(test_simple_commands test_simple_commands.cpp)
 

unittest/cplusplus/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for testing the direct calls to individual C++ classes
 
 add_executable(test_lammps_class test_lammps_class.cpp)
 target_link_libraries(test_lammps_class PRIVATE lammps GTest::GMockMain)

unittest/force-styles/CMakeLists.libyaml

@@ -1,6 +1,6 @@
 # Custom minimal -*- CMake -*- file for libyaml
 
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.16)
 project(libyaml VERSION 0.2.5
   DESCRIPTION "LibYAML a YAML parser and emitter library"
   LANGUAGES C

unittest/force-styles/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for tests of classes computing or modifying forces
 
 find_package(YAML)
 if(NOT YAML_FOUND)

unittest/formats/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for tests of file reading or writing classes and functions in LAMMPS
 
 add_executable(test_atom_styles test_atom_styles.cpp)
 target_link_libraries(test_atom_styles PRIVATE lammps GTest::GMock)

unittest/fortran/CMakeLists.txt

@@ -1,3 +1,5 @@
+# -*- CMake -*- file for testing the Fortran interface to LAMMPS
+
 include(CheckGeneratorSupport)
 if(NOT CMAKE_GENERATOR_SUPPORT_FORTRAN)
   message(STATUS "Skipping Tests for the LAMMPS Fortran Module: no Fortran support in build tool")

unittest/python/CMakeLists.txt

@@ -1,7 +1,8 @@
-# Test calling Python from LAMMPS (and importing the LAMMPS module
-# inside those functions). This can do an "anonymous" import of symbols
-# from the executable, so the shared library is not needed. The
-# availability of the PYTHON package is tested for inside the tester.
+# -*- CMake -*- file for tests calling Python from LAMMPS (and importing
+# the LAMMPS module inside those functions). This can do an "anonymous"
+# import of symbols from the executable, so the shared library is not
+# needed. The availability of the PYTHON package is tested for inside
+# the tester.
 
 set(TEST_INPUT_FOLDER ${CMAKE_CURRENT_SOURCE_DIR})
 

unittest/tools/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for tests of utily functions and classes in LAMMPS
 
 # we use python 3's subprocess module to run the tools and check the output
 if(CMAKE_VERSION VERSION_LESS 3.12)

unittest/utils/CMakeLists.txt

@@ -1,3 +1,4 @@
+# -*- CMake -*- file for tests of utily functions and classes in LAMMPS
 
 add_executable(test_tokenizer test_tokenizer.cpp)
 target_link_libraries(test_tokenizer PRIVATE lammps GTest::GMockMain)