Add CMake include_guard() directives to each *.cmake file (#683)

Author: aobolensk

cmake/configure.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE "Release")
 endif(NOT CMAKE_BUILD_TYPE)

cmake/functions.cmake

@@ -1,4 +1,6 @@
 # ——— Helper function to add & register tests —————————————————————————
+include_guard()
+
 function(ppc_add_test test_name test_src USE_FLAG)
   if(${USE_FLAG})
     add_executable(${test_name} "${PROJECT_SOURCE_DIR}/${test_src}")

cmake/gtest.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 include(ExternalProject)
 
 ExternalProject_Add(

cmake/json.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 include(ExternalProject)
 
 ExternalProject_Add(

cmake/libenvpp.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 include(ExternalProject)
 ExternalProject_Add(
   ppc_libenvpp

cmake/modes.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 add_compile_definitions(PPC_PATH_TO_PROJECT="${CMAKE_CURRENT_SOURCE_DIR}")
 
 macro(SUBDIRLIST result curdir)

cmake/mpi.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 find_package(MPI REQUIRED COMPONENTS CXX)
 if(NOT MPI_FOUND)
   message(FATAL_ERROR "MPI NOT FOUND")

cmake/onetbb.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 include(ExternalProject)
 
 option(ENABLE_SYSTEM_TBB "Use system TBB instead of bundled version" OFF)

cmake/openmp.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 if(MSVC AND NOT (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
   set(OpenMP_C_FLAGS
       "/openmp:llvm"

cmake/sanitizers.cmake

@@ -1,3 +1,5 @@
+include_guard()
+
 option(ENABLE_ADDRESS_SANITIZER OFF)
 option(ENABLE_UB_SANITIZER OFF)
 option(ENABLE_LEAK_SANITIZER OFF)