add a fatal error, and make sure c and c++ compilers work before using them

4 files changed, 44 insertions, 2 deletions

diff --git a/Modules/CMakeDetermineCCompiler.cmake b/Modules/CMakeDetermineCCompiler.cmake
index 7870ef3..6c7d4c7 100644
--- a/Modules/CMakeDetermineCCompiler.cmake
+++ b/Modules/CMakeDetermineCCompiler.cmake
@@ -13,7 +13,7 @@ IF(NOT CMAKE_C_COMPILER)
     GET_FILENAME_COMPONENT(CMAKE_C_COMPILER_INIT $ENV{CC} PROGRAM PROGRAM_ARGS CMAKE_C_FLAGS_ENV_INIT)
     IF(EXISTS ${CMAKE_C_COMPILER_INIT})
     ELSE(EXISTS ${CMAKE_C_COMPILER_INIT})
-      MESSAGE(SEND_ERROR "Could not find compiler set in environment variable CC:\n$ENV{CC}.") 
+      MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CC:\n$ENV{CC}.") 
     ENDIF(EXISTS ${CMAKE_C_COMPILER_INIT})
   ENDIF($ENV{CC} MATCHES ".+")
 
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake
index e7dcf87..3de759b 100644
--- a/Modules/CMakeDetermineCXXCompiler.cmake
+++ b/Modules/CMakeDetermineCXXCompiler.cmake
@@ -13,7 +13,7 @@ IF(NOT CMAKE_CXX_COMPILER)
     GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT)
     IF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
     ELSE(EXISTS ${CMAKE_CXX_COMPILER_INIT})
-      MESSAGE(SEND_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}")
+      MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}")
     ENDIF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
   ENDIF($ENV{CXX} MATCHES ".+")
 
@@ -50,3 +50,7 @@ ENDIF(NOT CMAKE_COMPILER_RETURN)
 CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in 
                ${CMAKE_BINARY_DIR}/CMakeCXXCompiler.cmake IMMEDIATE)
 MARK_AS_ADVANCED(CMAKE_CXX_COMPILER_FULLPATH)
+
+
+   
+      
diff --git a/Modules/CMakeTestCCompiler.cmake b/Modules/CMakeTestCCompiler.cmake
new file mode 100644
index 0000000..8e88c0a
--- /dev/null
+++ b/Modules/CMakeTestCCompiler.cmake
@@ -0,0 +1,19 @@
+# This file is used by EnableLanguage in cmGlobalGenerator to
+# determine that that selected C compiler can actually compile
+# and like the most basic of programs.   If not, a fatel error
+# is set and cmake stops processing commands and will not generate
+# any makefiles or projects.
+MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER}")
+WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeTmp/testCCompiler.c "int main(){return 0;}")
+TRY_COMPILE(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR} 
+            ${CMAKE_BINARY_DIR}/CMakeTmp/testCCompiler.c
+            OUTPUT_VARIABLE OUTPUT)
+IF(NOT CMAKE_C_COMPILER_WORKS)
+   MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER} -- broken")
+   MESSAGE(FATAL_ERROR "The C compiler \"${CMAKE_C_COMPILER}\" "
+                      "is not able to compile a simple tests program.\nIt fails "
+                      "with the following output:\n ${OUTPUT}\n\n"
+                      "CMake will not be able to correctly generate this project.")
+ELSE(NOT CMAKE_C_COMPILER_WORKS)
+  MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER} -- works")
+ENDIF(NOT CMAKE_C_COMPILER_WORKS)
diff --git a/Modules/CMakeTestCXXCompiler.cmake b/Modules/CMakeTestCXXCompiler.cmake
new file mode 100644
index 0000000..5609c96
--- /dev/null
+++ b/Modules/CMakeTestCXXCompiler.cmake
@@ -0,0 +1,19 @@
+# This file is used by EnableLanguage in cmGlobalGenerator to
+# determine that that selected C++ compiler can actually compile
+# and like the most basic of programs.   If not, a fatel error
+# is set and cmake stops processing commands and will not generate
+# any makefiles or projects.
+MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER}")
+WRITE_FILE(${CMAKE_BINARY_DIR}/CMakeTmp/testCXXCompiler.cxx "int main(){return 0;}")
+TRY_COMPILE(CMAKE_CXX_COMPILER_WORKS ${CMAKE_BINARY_DIR} 
+          ${CMAKE_BINARY_DIR}/CMakeTmp/testCXXCompiler.cxx
+          OUTPUT_VARIABLE OUTPUT)
+IF(NOT CMAKE_CXX_COMPILER_WORKS)
+ MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} -- broken")
+ MESSAGE(FATAL_ERROR "The C++ compiler \"${CMAKE_CXX_COMPILER}\" "
+                     "is not able to compile a simple tests program.\nIt fails "
+                     "with the following output:\n ${OUTPUT}\n\n"
+                     "CMake will not be able to correctly generate this project.")
+ELSE(NOT CMAKE_CXX_COMPILER_WORKS)
+  MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} -- works")
+ENDIF(NOT CMAKE_CXX_COMPILER_WORKS)