Merge pull request #4873 from ye-luo/more-compiler-check

Add more compilation tests in CMake.

CMake/TestCXXMainCompiles.cmake

@@ -0,0 +1,18 @@
+# Check that the configured compiler works on a C++ main function
+# Note: whitespaces not allowed in STAGE_NAME
+function(TestCXXMainCompiles STAGE_NAME)
+  if(STAGE_NAME MATCHES " ")
+    message(FATAL_ERROR "TestCXXMainCompiles whitespaces not allowed in the stage name. The given value is '${STAGE_NAME}'.")
+  endif()
+  set(TEST_CXX_COMPILE_MAIN_DIR ${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp)
+  file(WRITE ${TEST_CXX_COMPILE_MAIN_DIR}/try_cxx_main.cpp "int main(){}")
+  set(TEST_RESULT_VAR_NAME TEST_RESULT_${STAGE_NAME})
+  try_compile(
+    ${TEST_RESULT_VAR_NAME}
+    ${TEST_CXX_COMPILE_MAIN_DIR}
+    SOURCES ${TEST_CXX_COMPILE_MAIN_DIR}/try_cxx_main.cpp
+    OUTPUT_VARIABLE COMPILE_OUTPUT)
+  if(NOT ${TEST_RESULT_VAR_NAME})
+    message(FATAL_ERROR "Failed in compiling a main() function in stage ${STAGE_NAME}. Output:\n${COMPILE_OUTPUT}")
+  endif()
+endfunction()

CMakeLists.txt

@@ -238,6 +238,8 @@ endif(QMC_OMP)
 #-------------------------------------------------------------------------------
 # Set vendor specific compiler options
 #-------------------------------------------------------------------------------
+include(TestCXXMainCompiles)
+TestCXXMainCompiles("Before_Customization")
 if(CMAKE_TOOLCHAIN_FILE)
   message(STATUS "Using ${CMAKE_TOOLCHAIN_FILE} toolchain ")
 else(CMAKE_TOOLCHAIN_FILE)
@@ -278,7 +280,7 @@ else(CMAKE_TOOLCHAIN_FILE)
   endif()
 
   include(inspectCompiler)
-
+  TestCXXMainCompiles("After_Customization")
 endif(CMAKE_TOOLCHAIN_FILE)
 
 if(NOT CMAKE_CXX_COMPILER_ID STREQUAL CMAKE_C_COMPILER_ID)
@@ -326,7 +328,7 @@ if(NOT "${ENABLE_SANITIZER}" STREQUAL "none")
   endif()
 
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_SAN}")
-
+  TestCXXMainCompiles("With_Sanitizers")
 endif()
 
 #-----------------------------------------------------------------------
@@ -403,6 +405,7 @@ if(QMC_OMP)
     option(ENABLE_OFFLOAD_CLANG_DEBUG_O3 "build OMP target kernels with -O3 in the build type Debug" ON)
   endif()
   mark_as_advanced(ENABLE_OFFLOAD_CLANG_DEBUG_O3)
+  TestCXXMainCompiles("With_OpenMP")
 endif()
 
 #-------------------------------------------------------------------------------------
@@ -418,17 +421,6 @@ if(QMC_EXP_THREADING)
   add_definitions(-DQMC_EXP_THREADING)
 endif(QMC_EXP_THREADING)
 
-#--------------------------------------------------------------
-# final test for compile options before searching for libraries
-#--------------------------------------------------------------
-include(CheckCXXSourceCompiles)
-check_cxx_source_compiles("int main(){}" TEST_CXX_COMPILE_MAIN)
-if(NOT TEST_CXX_COMPILE_MAIN)
-  unset(TEST_CXX_COMPILE_MAIN CACHE)
-  message(FATAL_ERROR "Failed in compiling a main() function likely due to incorrect compile options. "
-                      "Check error in \"${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/CMakeError.log\".")
-endif()
-
 ######################################################################
 # Check external libraries.
 ######################################################################