modules: Added module to check for proto definition.

2 files changed, 126 insertions, 0 deletions

diff --git a/modules/prototype/CheckPrototypeDefinition.c.in b/modules/prototype/CheckPrototypeDefinition.c.in
new file mode 100644
index 0000000..a97344a
--- /dev/null
+++ b/modules/prototype/CheckPrototypeDefinition.c.in
@@ -0,0 +1,29 @@
+@CHECK_PROTOTYPE_DEFINITION_HEADER@
+
+static void cmakeRequireSymbol(int dummy, ...) {
+  (void) dummy;
+}
+
+static void checkSymbol(void) {
+#ifndef @CHECK_PROTOTYPE_DEFINITION_SYMBOL@
+  cmakeRequireSymbol(0, &@CHECK_PROTOTYPE_DEFINITION_SYMBOL@);
+#endif
+}
+
+@CHECK_PROTOTYPE_DEFINITION_PROTO@ {
+  return @CHECK_PROTOTYPE_DEFINITION_RETURN@;
+}
+
+#ifdef __CLASSIC_C__
+int main() {
+  int ac;
+  char*av[];
+#else
+int main(int ac, char *av[]) {
+#endif
+  checkSymbol();
+  if (ac > 1000) {
+    return *av[0];
+  }
+  return 0;
+}
diff --git a/modules/prototype/CheckPrototypeDefinition.cmake b/modules/prototype/CheckPrototypeDefinition.cmake
new file mode 100644
index 0000000..9d78f17
--- /dev/null
+++ b/modules/prototype/CheckPrototypeDefinition.cmake
@@ -0,0 +1,97 @@
+# - Check if the protoype we expect is correct.
+# check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)
+#
+#  FUNCTION - The name of the function (used to check if prototype exists)
+#  PROTOTYPE- The prototype to check.
+#  RETURN - The return value of the function.
+#  HEADER - The header files required.
+#  VARIABLE - The variable to store the result.
+#
+# Example:
+#
+# check_prototype_definition(getpwent_r
+#     "struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)"
+#     "NULL"
+#     "unistd.h;pwd.h"
+#     SOLARIS_GETPWENT_R)
+#
+# 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
+#
+#=============================================================================
+#  Copyright (c) 2010-2011 Andreas Schneider <asn@cryptomilk.org>
+#
+#  Distributed under the OSI-approved BSD License (the "License");
+#  see accompanying file Copyright.txt for details.
+#
+#  This software is distributed WITHOUT ANY WARRANTY; without even the
+#  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+#  See the License for more information.
+#=============================================================================
+#
+
+function(CHECK_PROTOTYPE_DEFINITION _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIABLE)
+
+    if ("${_VARIABLE}" MATCHES "^${_VARIABLE}$")
+        set(CHECK_PROTOTYPE_DEFINITION_CONTENT "/* */\n")
+
+        set(CHECK_PROTOTYPE_DEFINITION_FLAGS ${CMAKE_REQUIRED_FLAGS})
+        if (CMAKE_REQUIRED_LIBRARIES)
+          set(CHECK_PROTOTYPE_DEFINITION_LIBS
+              "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
+        else(CMAKE_REQUIRED_LIBRARIES)
+            set(CHECK_PROTOTYPE_DEFINITION_LIBS)
+        endif(CMAKE_REQUIRED_LIBRARIES)
+        if (CMAKE_REQUIRED_INCLUDES)
+            set(CMAKE_SYMBOL_EXISTS_INCLUDES
+                "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
+        else(CMAKE_REQUIRED_INCLUDES)
+            set(CMAKE_SYMBOL_EXISTS_INCLUDES)
+        endif(CMAKE_REQUIRED_INCLUDES)
+
+        foreach(_FILE ${_HEADER})
+          set(CHECK_PROTOTYPE_DEFINITION_HEADER
+            "${CHECK_PROTOTYPE_DEFINITION_HEADER}#include <${_FILE}>\n")
+        endforeach(_FILE)
+
+        set(CHECK_PROTOTYPE_DEFINITION_SYMBOL ${_FUNCTION})
+        set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE})
+        set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN})
+
+        #configure_file("${CMAKE_ROOT}/Modules/CheckPrototypeDefinition.c.in"
+        #  "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
+        configure_file("${CMAKE_MODULE_PATH}/CheckPrototypeDefinition.c.in"
+            "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
+
+        file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE)
+
+        try_compile(${_VARIABLE}
+          ${CMAKE_BINARY_DIR}
+          ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c
+          COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
+          CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CHECK_PROTOTYPE_DEFINITION_FLAGS}
+          "${CHECK_PROTOTYPE_DEFINITION_LIBS}"
+          "${CMAKE_SYMBOL_EXISTS_INCLUDES}"
+          OUTPUT_VARIABLE OUTPUT)
+
+        if (${_VARIABLE})
+            set(${_VARIABLE} 1 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
+            message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - True")
+            file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+                "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} passed with the following output:\n"
+                "${OUTPUT}\n\n")
+        else (${_VARIABLE})
+            message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - False")
+            set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
+            file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+                "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} failed with the following output:\n"
+                "${OUTPUT}\n\n${_SOURCE}\n\n")
+        endif (${_VARIABLE})
+    endif("${_VARIABLE}" MATCHES "^${_VARIABLE}$")
+
+endfunction(CHECK_PROTOTYPE_DEFINITION)