CheckLangSourceRuns: Capture run output to log files

Fixes: #18973

Modules/CheckCXXSourceRuns.cmake

@@ -103,7 +103,8 @@ macro(CHECK_CXX_SOURCE_RUNS SOURCE VAR)
       CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
       -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
       "${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
-      COMPILE_OUTPUT_VARIABLE OUTPUT)
+      COMPILE_OUTPUT_VARIABLE OUTPUT
+      RUN_OUTPUT_VARIABLE RUN_OUTPUT)
 
     # if it did not compile make the return value fail code of 1
     if(NOT ${VAR}_COMPILED)
@@ -118,6 +119,8 @@ macro(CHECK_CXX_SOURCE_RUNS SOURCE VAR)
       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
         "Performing C++ SOURCE FILE Test ${VAR} succeeded with the following output:\n"
         "${OUTPUT}\n"
+        "...and run output:\n"
+        "${RUN_OUTPUT}\n"
         "Return value: ${${VAR}}\n"
         "Source file was:\n${SOURCE}\n")
     else()
@@ -133,6 +136,8 @@ macro(CHECK_CXX_SOURCE_RUNS SOURCE VAR)
       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
         "Performing C++ SOURCE FILE Test ${VAR} failed with the following output:\n"
         "${OUTPUT}\n"
+        "...and run output:\n"
+        "${RUN_OUTPUT}\n"
         "Return value: ${${VAR}_EXITCODE}\n"
         "Source file was:\n${SOURCE}\n")
     endif()

Modules/CheckFortranSourceRuns.cmake

@@ -133,7 +133,8 @@ macro(CHECK_Fortran_SOURCE_RUNS SOURCE VAR)
       CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
       -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
       "${CHECK_Fortran_SOURCE_COMPILES_ADD_INCLUDES}"
-      COMPILE_OUTPUT_VARIABLE OUTPUT)
+      COMPILE_OUTPUT_VARIABLE OUTPUT
+      RUN_OUTPUT_VARIABLE RUN_OUTPUT)
 
     # if it did not compile make the return value fail code of 1
     if(NOT ${VAR}_COMPILED)
@@ -148,6 +149,8 @@ macro(CHECK_Fortran_SOURCE_RUNS SOURCE VAR)
       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
         "Performing Fortran SOURCE FILE Test ${VAR} succeeded with the following output:\n"
         "${OUTPUT}\n"
+        "...and run output:\n"
+        "${RUN_OUTPUT}\n"
         "Return value: ${${VAR}}\n"
         "Source file was:\n${SOURCE}\n")
     else()
@@ -163,6 +166,8 @@ macro(CHECK_Fortran_SOURCE_RUNS SOURCE VAR)
       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
         "Performing Fortran SOURCE FILE Test ${VAR} failed with the following output:\n"
         "${OUTPUT}\n"
+        "...and run output:\n"
+        "${RUN_OUTPUT}\n"
         "Return value: ${${VAR}_EXITCODE}\n"
         "Source file was:\n${SOURCE}\n")
     endif()