From 5a08e1b6dcd1a476f7750839204205f54bef8e13 Mon Sep 17 00:00:00 2001
From: Andy Cedilnik <andy.cedilnik@kitware.com>
Date: Fri, 20 Sep 2002 13:40:39 -0400
Subject: Add macro which checks if the header file exists

---
 Modules/CheckIncludeFile.c.in  | 14 ++++++++++++++
 Modules/CheckIncludeFile.cmake | 26 ++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 Modules/CheckIncludeFile.c.in
 create mode 100644 Modules/CheckIncludeFile.cmake

diff --git a/Modules/CheckIncludeFile.c.in b/Modules/CheckIncludeFile.c.in
new file mode 100644
index 0000000..5f0f466
--- /dev/null
+++ b/Modules/CheckIncludeFile.c.in
@@ -0,0 +1,14 @@
+#ifdef CHECK_INCLUDE_FILE
+
+#include <${CHECK_INCLUDE_FILE_VAR}>
+
+int main()
+{
+  return 0;
+}
+
+#else  /* CHECK_INCLUDE_FILE */
+
+#  error "CHECK_INCLUDE_FILE has to specify the include file"
+
+#endif /* CHECK_INCLUDE_FILE */
diff --git a/Modules/CheckIncludeFile.cmake b/Modules/CheckIncludeFile.cmake
new file mode 100644
index 0000000..f88c7ca
--- /dev/null
+++ b/Modules/CheckIncludeFile.cmake
@@ -0,0 +1,26 @@
+#
+# Check if the include file exists.
+#
+# CHECK_INCLUDE_FILE - macro which checks the include file exists.
+# INCLUDE - name of include file
+# VARIABLE - variable to return result
+#
+
+MACRO(CHECK_INCLUDE_FILE INCLUDE VARIABLE)
+  SET(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
+  CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CheckIncludeFile.c.in
+                 ${PROJECT_BINARY_DIR}/CheckIncludeFile.c IMMEDIATE)
+  TRY_COMPILE(COMPILE_OK
+             ${PROJECT_BINARY_DIR}
+             ${PROJECT_BINARY_DIR}/CheckIncludeFile.c
+             COMPILE_DEFINITIONS -DCHECK_INCLUDE_FILE="${INCLUDE}"
+             OUTPUT_VARIABLE OUTPUT)
+  IF(COMPILE_OK)
+    SET(${VARIABLE} ${COMPILE_OK})
+  ELSE(COMPILE_OK)
+    WRITE_FILE(${PROJECT_BINARY_DIR}/CMakeError.log 
+      "Determining if the include file ${INCLUDE} "
+      "exists failed with the following output:\n"
+      "${OUTPUT}\n")
+  ENDIF(COMPILE_OK)
+ENDMACRO(CHECK_INCLUDE_FILE)
-- 
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