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author | Andreas Schneider <asn@cryptomilk.org> | 2011-02-10 19:28:04 +0100 |
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committer | Andreas Schneider <asn@cryptomilk.org> | 2011-02-10 19:28:04 +0100 |
commit | 656ad8c8bc146e9a46be0d1ac248407ec2190108 (patch) | |
tree | 16e2f8c5c727b0f9fbdb9d94bb11023a64b2fdf2 | |
parent | ad8370843b43cb4519be1933f0ef90c2b58c8f6e (diff) | |
download | cmake-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.in | 29 | ||||
-rw-r--r-- | Modules/CheckPrototypeDefinition.cmake | 95 |
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) |