summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndreas Schneider <asn@cryptomilk.org>2011-02-10 19:28:04 +0100
committerAndreas Schneider <asn@cryptomilk.org>2011-02-10 19:28:04 +0100
commit656ad8c8bc146e9a46be0d1ac248407ec2190108 (patch)
tree16e2f8c5c727b0f9fbdb9d94bb11023a64b2fdf2
parentad8370843b43cb4519be1933f0ef90c2b58c8f6e (diff)
downloadcmake-next-modules.tar.gz
cmake-next-modules.tar.xz
cmake-next-modules.zip
Modules: Added CheckPrototypeDefinition module.next-modules
This check if the function exists and the prototype we want to use is correct. There are still functions which have different prototypes on different UNIX systems.
-rw-r--r--Modules/CheckPrototypeDefinition.c.in29
-rw-r--r--Modules/CheckPrototypeDefinition.cmake95
2 files changed, 124 insertions, 0 deletions
diff --git a/Modules/CheckPrototypeDefinition.c.in b/Modules/CheckPrototypeDefinition.c.in
new file mode 100644
index 000000000..a97344ac3
--- /dev/null
+++ b/Modules/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/CheckPrototypeDefinition.cmake b/Modules/CheckPrototypeDefinition.cmake
new file mode 100644
index 000000000..d5a405e83
--- /dev/null
+++ b/Modules/CheckPrototypeDefinition.cmake
@@ -0,0 +1,95 @@
+# - 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_CURRENT_LIST_DIR}/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)