add CheckCSourceRuns from cmake cvs - remove after upgrade to cmake 2.5

svn path=/trunk/KDE/kdelibs/; revision=575090

1 files changed, 70 insertions, 0 deletions

diff --git a/modules/CheckCSourceRuns.cmake b/modules/CheckCSourceRuns.cmake
new file mode 100644
index 00000000..b341ffdd
--- /dev/null
+++ b/modules/CheckCSourceRuns.cmake
@@ -0,0 +1,70 @@
+# XXX remove this when we use cmake 2.5
+
+# - Check if the source code provided in the SOURCE argument compiles and runs.
+# CHECK_C_SOURCE_RUNS(SOURCE VAR)
+# - macro which checks if the source code runs
+#  SOURCE   - source code to try to compile
+#  VAR - variable to store size if the type exists.
+#
+# The following variables may be set before calling this macro to
+# modify the way the check is run:
+#
+#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
+#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
+#  CMAKE_REQUIRED_INCLUDES = list of include directories
+#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+
+MACRO(CHECK_C_SOURCE_RUNS SOURCE VAR)
+  IF("${VAR}" MATCHES "^${VAR}$")
+    SET(MACRO_CHECK_FUNCTION_DEFINITIONS 
+      "-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
+    IF(CMAKE_REQUIRED_LIBRARIES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
+        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
+    ELSE(CMAKE_REQUIRED_LIBRARIES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES)
+    ENDIF(CMAKE_REQUIRED_LIBRARIES)
+    IF(CMAKE_REQUIRED_INCLUDES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES
+        "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
+    ELSE(CMAKE_REQUIRED_INCLUDES)
+      SET(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES)
+    ENDIF(CMAKE_REQUIRED_INCLUDES)
+    FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
+      "${SOURCE}\n")
+
+    MESSAGE(STATUS "Performing Test ${VAR}")
+    TRY_RUN(${VAR} ${VAR}_COMPILED
+      ${CMAKE_BINARY_DIR}
+      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
+      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
+      "${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
+      "${CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
+      OUTPUT_VARIABLE OUTPUT)
+    # if it did not compile make the return value fail code of 1
+    IF(NOT ${VAR}_COMPILED)
+      SET(${VAR} 1)
+    ENDIF(NOT ${VAR}_COMPILED)
+    # if the return value was 0 then it worked
+    SET(result_var ${${VAR}})
+    IF("${result_var}" EQUAL 0)
+      SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
+      MESSAGE(STATUS "Performing Test ${VAR} - Success")
+      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log 
+        "Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
+        "${OUTPUT}\n"
+        "Return value: ${${VAR}}\n"
+        "Source file was:\n${SOURCE}\n")
+    ELSE("${result_var}" EQUAL 0)
+      MESSAGE(STATUS "Performing Test ${VAR} - Failed")
+      SET(${VAR} "" CACHE INTERNAL "Test ${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"
+        "Return value: ${result_var}\n"
+        "Source file was:\n${SOURCE}\n")
+    ENDIF("${result_var}" EQUAL 0)
+  ENDIF("${VAR}" MATCHES "^${VAR}$")
+ENDMACRO(CHECK_C_SOURCE_RUNS)
+