STYLE: remove unused CheckTypeSize.c.in

ENH: change test for endianess from TRY_RUN() to TRY_COMPILE() by testing
the binary image of a 16bit integer array, tested on Linux x86, Intel Mac
and Sun (big endian)

Alex

1 files changed, 78 insertions, 30 deletions

diff --git a/Modules/TestBigEndian.cmake b/Modules/TestBigEndian.cmake
index 2d1853cc26..bf91fb777e 100644
--- a/Modules/TestBigEndian.cmake
+++ b/Modules/TestBigEndian.cmake
@@ -5,37 +5,85 @@
 #
 
 MACRO(TEST_BIG_ENDIAN VARIABLE)
-  SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
-  IF(NOT DEFINED ${VARIABLE})
   IF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
-    TRY_RUN(${VARIABLE} HAVE_${VARIABLE}
-      ${CMAKE_BINARY_DIR}
-      ${CMAKE_ROOT}/Modules/TestBigEndian.c
-      COMPILE_OUTPUT_VARIABLE OUTPUT)
-    IF("${VARIABLE}" STREQUAL "FAILED_TO_RUN")
-      MESSAGE(SEND_ERROR "TestBigEndian Failed to run with output: ${OUTPUT}")
-    ENDIF("${VARIABLE}" STREQUAL "FAILED_TO_RUN")
     MESSAGE(STATUS "Check if the system is big endian")
-    IF(HAVE_${VARIABLE})
-      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
-        "Determining the endianes of the system passed. The system is ")
-      IF(${VARIABLE})
-        FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
-          "big endian")
-        MESSAGE(STATUS "Check if the system is big endian - big endian")
-      ELSE(${VARIABLE})
-        FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
-          "little endian")
-        MESSAGE(STATUS "Check if the system is big endian - little endian")
-      ENDIF(${VARIABLE})
-      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-        "Test produced following output:\n${OUTPUT}\n\n")
-    ELSE(HAVE_${VARIABLE})
-      FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
-        "Determining the endianes of the system failed with the following output:\n${OUTPUT}\n\n")
-      MESSAGE("Check if the system is big endian - failed")
-    ENDIF(HAVE_${VARIABLE})
+    MESSAGE(STATUS "Searching 16 bit integer")
+  
+    INCLUDE(CheckTypeSize)
+
+    CHECK_TYPE_SIZE("unsigned short" CMAKE_SIZEOF_UNSIGNED_SHORT)
+    IF(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
+      MESSAGE(STATUS "Using unsigned short")
+      SET(CMAKE_16BIT_TYPE "unsigned short")
+    ELSE(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
+      CHECK_TYPE_SIZE("unsigned int"   CMAKE_SIZEOF_UNSIGNED_INT)
+      IF(CMAKE_SIZEOF_UNSIGNED_INT)
+        MESSAGE(STATUS "Using unsigned int")
+        SET(CMAKE_16BIT_TYPE "unsigned int")
+
+      ELSE(CMAKE_SIZEOF_UNSIGNED_INT)
+  
+        CHECK_TYPE_SIZE("unsigned long"  CMAKE_SIZEOF_UNSIGNED_LONG)
+        IF(CMAKE_SIZEOF_UNSIGNED_LONG)
+          MESSAGE(STATUS "Using unsigned long")
+          SET(CMAKE_16BIT_TYPE "unsigned long")
+        ELSE(CMAKE_SIZEOF_UNSIGNED_LONG)
+          MESSAGE(FATAL_ERROR "no suitable type found")
+        ENDIF(CMAKE_SIZEOF_UNSIGNED_LONG)
+    
+      ENDIF(CMAKE_SIZEOF_UNSIGNED_INT)
+    
+    ENDIF(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
+
+  
+    CONFIGURE_FILE("${CMAKE_ROOT}/Modules/TestEndianess.c.in" 
+                   "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
+                    IMMEDIATE @ONLY)
+  
+     FILE(READ "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
+          TEST_ENDIANESS_FILE_CONTENT)
+      
+     TRY_COMPILE(HAVE_${VARIABLE}
+      "${CMAKE_BINARY_DIR}"
+      "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
+      OUTPUT_VARIABLE OUTPUT
+      COPY_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" )
+
+      IF(HAVE_${VARIABLE})
+
+        FILE(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin"
+            CMAKE_TEST_ENDIANESS_STRINGS_LE LIMIT_COUNT 1 REGEX "THIS IS LITTLE ENDIAN")
+  
+        FILE(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin"
+            CMAKE_TEST_ENDIANESS_STRINGS_BE LIMIT_COUNT 1 REGEX "THIS IS BIG ENDIAN")
+ 
+        IF(CMAKE_TEST_ENDIANESS_STRINGS_LE)
+          SET(${VARIABLE} 0 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE)
+          MESSAGE(STATUS "Check if the system is big endian - little endian")
+        ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_LE)
+        
+        IF(CMAKE_TEST_ENDIANESS_STRINGS_BE)
+          SET(${VARIABLE} 1 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE)
+          MESSAGE(STATUS "Check if the system is big endian - big endian")
+        ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_BE)
+        
+        IF(CMAKE_TEST_ENDIANESS_STRINGS_BE  AND  CMAKE_TEST_ENDIANESS_STRINGS_LE)
+          MESSAGE(SEND_ERROR "TEST_BIG_ENDIAN found different results, consider setting CMAKE_OSX_ARCHITECTURES or CMAKE_TRY_COMPILE_OSX_ARCHITECTURES to one or no architecture !")
+        ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_BE  AND  CMAKE_TEST_ENDIANESS_STRINGS_LE)
+        IF(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE  AND  NOT CMAKE_TEST_ENDIANESS_STRINGS_LE)
+          MESSAGE(SEND_ERROR "TEST_BIG_ENDIAN found no !")
+        ENDIF(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE  AND  NOT CMAKE_TEST_ENDIANESS_STRINGS_LE)
+ 
+        FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+          "Determining if the system is big endian passed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
+ 
+      ELSE(HAVE_${VARIABLE})
+        MESSAGE(STATUS "Check if the system is big endian - failed")
+        FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+          "Determining if the system is big endian failed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
+        SET(${VARIABLE})
+      ENDIF(HAVE_${VARIABLE})
   ENDIF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
-  ENDIF(NOT DEFINED ${VARIABLE})
-  SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS)
 ENDMACRO(TEST_BIG_ENDIAN)
+
+