diff options
Diffstat (limited to 'Modules/CheckStructHasMember.cmake')
-rw-r--r-- | Modules/CheckStructHasMember.cmake | 85 |
1 files changed, 54 insertions, 31 deletions
diff --git a/Modules/CheckStructHasMember.cmake b/Modules/CheckStructHasMember.cmake index ea2891c8b..085b46492 100644 --- a/Modules/CheckStructHasMember.cmake +++ b/Modules/CheckStructHasMember.cmake @@ -1,51 +1,74 @@ -# - Check if the given struct or class has the specified member variable -# CHECK_STRUCT_HAS_MEMBER (STRUCT MEMBER HEADER VARIABLE) +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#.rst: +# CheckStructHasMember +# -------------------- # -# STRUCT - the name of the struct or class you are interested in -# MEMBER - the member which existence you want to check -# HEADER - the header(s) where the prototype should be declared -# VARIABLE - variable to store the result +# Check if the given struct or class has the specified member variable # -# 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 +# CHECK_STRUCT_HAS_MEMBER(<struct> <member> <header> <variable> +# [LANGUAGE <language>]) # -# Example: CHECK_STRUCT_HAS_MEMBER("struct timeval" tv_sec sys/select.h HAVE_TIMEVAL_TV_SEC) - -#============================================================================= -# Copyright 2007-2009 Kitware, Inc. -# -# 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. -#============================================================================= -# (To distribute this file outside of CMake, substitute the full -# License text for the above reference.) +# :: +# +# <struct> - the name of the struct or class you are interested in +# <member> - the member which existence you want to check +# <header> - the header(s) where the prototype should be declared +# <variable> - variable to store the result +# <language> - the compiler to use (C or CXX) +# +# +# +# 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 +# CMAKE_REQUIRED_QUIET = execute quietly without messages +# +# +# +# Example: CHECK_STRUCT_HAS_MEMBER("struct timeval" tv_sec sys/select.h +# HAVE_TIMEVAL_TV_SEC LANGUAGE C) include(CheckCSourceCompiles) +include(CheckCXXSourceCompiles) macro (CHECK_STRUCT_HAS_MEMBER _STRUCT _MEMBER _HEADER _RESULT) set(_INCLUDE_FILES) foreach (it ${_HEADER}) - set(_INCLUDE_FILES "${_INCLUDE_FILES}#include <${it}>\n") + string(APPEND _INCLUDE_FILES "#include <${it}>\n") endforeach () + if("x${ARGN}" STREQUAL "x") + set(_lang C) + elseif("x${ARGN}" MATCHES "^xLANGUAGE;([a-zA-Z]+)$") + set(_lang "${CMAKE_MATCH_1}") + else() + message(FATAL_ERROR "Unknown arguments:\n ${ARGN}\n") + endif() + set(_CHECK_STRUCT_MEMBER_SOURCE_CODE " ${_INCLUDE_FILES} int main() { - ${_STRUCT}* tmp; - tmp->${_MEMBER}; - return 0; + (void)sizeof(((${_STRUCT} *)0)->${_MEMBER}); + return 0; } ") - CHECK_C_SOURCE_COMPILES("${_CHECK_STRUCT_MEMBER_SOURCE_CODE}" ${_RESULT}) + if("${_lang}" STREQUAL "C") + CHECK_C_SOURCE_COMPILES("${_CHECK_STRUCT_MEMBER_SOURCE_CODE}" ${_RESULT}) + elseif("${_lang}" STREQUAL "CXX") + CHECK_CXX_SOURCE_COMPILES("${_CHECK_STRUCT_MEMBER_SOURCE_CODE}" ${_RESULT}) + else() + message(FATAL_ERROR "Unknown language:\n ${_lang}\nSupported languages: C, CXX.\n") + endif() endmacro () - |