From 1ca225e19da3653cba2cd94543ab3f9019e83f3f Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michael.r.sweet@gmail.com>
Date: Mon, 13 Sep 2004 02:12:41 +0000
Subject: Added (unsupported) CMake files (STR #499)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@3829 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 CMake/CheckFunctionWithHeaderExists.cmake | 54 +++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 CMake/CheckFunctionWithHeaderExists.cmake

(limited to 'CMake/CheckFunctionWithHeaderExists.cmake')

diff --git a/CMake/CheckFunctionWithHeaderExists.cmake b/CMake/CheckFunctionWithHeaderExists.cmake
new file mode 100644
index 000000000..7d824cd96
--- /dev/null
+++ b/CMake/CheckFunctionWithHeaderExists.cmake
@@ -0,0 +1,54 @@
+#
+# Check if the symbol exists in include files
+#
+# CHECK_FUNCTIONWITHHEADER_EXISTS - macro which checks the symbol exists in include files.
+# SYMBOL - symbol
+# FILES  - include files to check
+# VARIABLE - variable to return result
+#
+
+MACRO(CHECK_FUNCTIONWITHHEADER_EXISTS SYMBOL FILES VARIABLE)
+  IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
+    SET(CHECK_SYMBOL_EXISTS_CONTENT "/* */\n")
+    SET(MACRO_CHECK_SYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
+    IF(CMAKE_REQUIRED_LIBRARIES)
+      SET(CHECK_SYMBOL_EXISTS_LIBS 
+        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
+    ENDIF(CMAKE_REQUIRED_LIBRARIES)
+    FOREACH(FILE ${FILES})
+      SET(CHECK_SYMBOL_EXISTS_CONTENT
+        "${CHECK_SYMBOL_EXISTS_CONTENT}#include <${FILE}>\n")
+    ENDFOREACH(FILE)
+    SET(CHECK_SYMBOL_EXISTS_CONTENT
+      "${CHECK_SYMBOL_EXISTS_CONTENT}\nint main()\n{\n${SYMBOL};return 0;\n}\n")
+
+    FILE(WRITE ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c 
+      "${CHECK_SYMBOL_EXISTS_CONTENT}")
+
+    MESSAGE(STATUS "Looking for ${SYMBOL}")
+    TRY_COMPILE(${VARIABLE}
+      ${CMAKE_BINARY_DIR}
+      ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c
+      CMAKE_FLAGS 
+      -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_SYMBOL_EXISTS_FLAGS}
+      "${CHECK_SYMBOL_EXISTS_LIBS}"
+      OUTPUT_VARIABLE OUTPUT)
+    IF(${VARIABLE})
+      MESSAGE(STATUS "Looking for ${SYMBOL} - found")
+      SET(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL}")
+      FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log 
+        "Determining if the ${SYMBOL} "
+        "exist passed with the following output:\n"
+        "${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
+        "${CHECK_SYMBOL_EXISTS_CONTENT}\n")
+    ELSE(${VARIABLE})
+      MESSAGE(STATUS "Looking for ${SYMBOL} - not found.")
+      SET(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}")
+      FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log 
+        "Determining if the ${SYMBOL} "
+        "exist failed with the following output:\n"
+        "${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
+        "${CHECK_SYMBOL_EXISTS_CONTENT}\n")
+    ENDIF(${VARIABLE})
+  ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
+ENDMACRO(CHECK_FUNCTIONWITHHEADER_EXISTS)
-- 
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