Add two commonly used modules. First one checks if the function exists, the second one checks the size of type

1 files changed, 22 insertions, 0 deletions

diff --git a/Modules/CheckFunctionExists.cmake b/Modules/CheckFunctionExists.cmake
new file mode 100644
index 0000000..690c17e
--- /dev/null
+++ b/Modules/CheckFunctionExists.cmake
@@ -0,0 +1,22 @@
+#
+# Check if the type exists and determine size of type.  if the type
+# exists, the size will be stored to the variable.
+#
+# CHECK_TYPE_SIZE - macro which checks the size of type
+# VARIABLE - variable to store size if the type exists.
+#
+
+MACRO(CHECK_FUNCTION_EXISTS FUNCTION VARIABLE)
+  TRY_COMPILE(COMPILE_OK
+             ${PROJECT_BINARY_DIR}
+             ${CMAKE_ROOT}/Modules/CheckFunctionExists.c
+             COMPILE_DEFINITIONS -DCHECK_FUNCTION_EXISTS=${FUNCTION} 
+             OUTPUT_VARIABLE OUTPUT)
+  IF(COMPILE_OK)
+    SET(${VARIABLE} ${COMPILE_OK})
+  ELSE(COMPILE_OK)
+    WRITE_FILE(${PROJECT_BINARY_DIR}/CMakeError.log 
+      "Determining if the function ${FUNCTION} exists failed with the following output:\n"
+      "${OUTPUT}\n")
+  ENDIF(COMPILE_OK)
+ENDMACRO(CHECK_FUNCTION_EXISTS)