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|
# - a gcrypt-config module for CMake
#
# Usage:
# gcrypt_check(<PREFIX> [REQUIRED] <MODULE>)
# checks if gcrypt is avialable
#
# When the 'REQUIRED' argument was set, macros will fail with an error
# when gcrypt could not be found.
#
# It sets the following variables:
# GCRYPT_CONFIG_FOUND ... true if libgcrypt-config works on the system
# GCRYPT_CONFIG_EXECUTABLE ... pathname of the libgcrypt-config program
# <PREFIX>_FOUND ... set to 1 if libgcrypt exist
# <PREFIX>_LIBRARIES ... the libraries
# <PREFIX>_CFLAGS ... all required cflags
# <PREFIX>_ALGORITHMS ... the algorithms that this libgcrypt supports
# <PREFIX>_VERSION ... gcrypt's version
#
# Examples:
# gcrypt_check (GCRYPT gcrypt)
# Check if a version of gcrypt is available, issues a warning
# if not.
#
# gcrypt_check (GCRYPT REQUIRED gcrypt)
# Check if a version of gcrypt is available and fails
# if not.
#
# gcrypt_check (GCRYPT gcrypt>=1.4)
# requires at least version 1.4 of gcrypt and defines e.g.
# GCRYPT_VERSION=1.4.4. Issues a warning if a lower version
# is available only.
#
# gcrypt_check (GCRYPT REQUIRED gcrypt>=1.4.4)
# requires at least version 1.4.4 of gcrypt and fails if
# only gcrypt 1.4.3 or lower is available only.
#
# Copyright (C) 2010 Werner Dittmann <werner.dittmann@t-online.de>
#
# Redistribution and use, with or without modification, are permitted
# provided that the following conditions are met:
#
# 1. Redistributions must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# 2. The name of the author may not be used to endorse or promote
# products derived from this software without specific prior
# written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
# GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# This is a much edited and simplified variant of the original UsePkgConfig.cmake
# from Enrico Scholz
# Copyright (C) 2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
#
### Common stuff ####
set(GCR_CONFIG_VERSION 1)
set(GCR_CONFIG_FOUND 0)
find_program(GCR_CONFIG_EXECUTABLE NAMES libgcrypt-config --version DOC "libgcrypt-config executable")
mark_as_advanced(GCR_CONFIG_EXECUTABLE)
if(GCR_CONFIG_EXECUTABLE)
set(GCR_CONFIG_FOUND 1)
endif(GCR_CONFIG_EXECUTABLE)
# Unsets the given variables
macro(_gcrconfig_unset var)
set(${var} "" CACHE INTERNAL "")
endmacro(_gcrconfig_unset)
macro(_gcrconfig_set var value)
set(${var} ${value} CACHE INTERNAL "")
endmacro(_gcrconfig_set)
# Invokes libgcrypt-config, cleans up the result and sets variables
macro(_gcrconfig_invoke _gcrlist _prefix _varname _regexp)
set(_gcrconfig_invoke_result)
execute_process(
COMMAND ${GCR_CONFIG_EXECUTABLE} ${ARGN}
OUTPUT_VARIABLE _gcrconfig_invoke_result
RESULT_VARIABLE _gcrconfig_failed)
if (_gcrconfig_failed)
set(_gcrconfig_${_varname} "")
_gcrconfig_unset(${_prefix}_${_varname})
else(_gcrconfig_failed)
string(REGEX REPLACE "[\r\n]" " " _gcrconfig_invoke_result "${_gcrconfig_invoke_result}")
string(REGEX REPLACE " +$" "" _gcrconfig_invoke_result "${_gcrconfig_invoke_result}")
if (NOT ${_regexp} STREQUAL "")
string(REGEX REPLACE "${_regexp}" " " _gcrconfig_invoke_result "${_gcrconfig_invoke_result}")
endif(NOT ${_regexp} STREQUAL "")
separate_arguments(_gcrconfig_invoke_result)
#message(STATUS " ${_varname} ... ${_gcrconfig_invoke_result}")
set(_gcrconfig_${_varname} ${_gcrconfig_invoke_result})
_gcrconfig_set(${_prefix}_${_varname} "${_gcrconfig_invoke_result}")
endif(_gcrconfig_failed)
endmacro(_gcrconfig_invoke)
macro(_gcrconfig_invoke_dyn _gcrlist _prefix _varname cleanup_regexp)
_gcrconfig_invoke("${_gcrlist}" ${_prefix} ${_varname} "${cleanup_regexp}" ${ARGN})
endmacro(_gcrconfig_invoke_dyn)
# Splits given arguments into options and a package list
macro(_gcrconfig_parse_options _result _is_req)
set(${_is_req} 0)
foreach(_gcr ${ARGN})
if (_gcr STREQUAL "REQUIRED")
set(${_is_req} 1)
endif (_gcr STREQUAL "REQUIRED")
endforeach(_gcr ${ARGN})
set(${_result} ${ARGN})
list(REMOVE_ITEM ${_result} "REQUIRED")
endmacro(_gcrconfig_parse_options)
###
macro(_gcr_check_modules_internal _is_required _is_silent _prefix)
_gcrconfig_unset(${_prefix}_FOUND)
_gcrconfig_unset(${_prefix}_VERSION)
_gcrconfig_unset(${_prefix}_PREFIX)
_gcrconfig_unset(${_prefix}_LIBDIR)
_gcrconfig_unset(${_prefix}_LIBRARIES)
_gcrconfig_unset(${_prefix}_CFLAGS)
_gcrconfig_unset(${_prefix}_ALGORITHMS)
# create a better addressable variable of the modules and calculate its size
set(_gcr_check_modules_list ${ARGN})
list(LENGTH _gcr_check_modules_list _gcr_check_modules_cnt)
if(GCR_CONFIG_EXECUTABLE)
# give out status message telling checked module
if (NOT ${_is_silent})
message(STATUS "checking for module '${_gcr_check_modules_list}'")
endif(NOT ${_is_silent})
# iterate through module list and check whether they exist and match the required version
foreach (_gcr_check_modules_gcr ${_gcr_check_modules_list})
# check whether version is given
if (_gcr_check_modules_gcr MATCHES ".*(>=|=|<=).*")
string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\1" _gcr_check_modules_gcr_name "${_gcr_check_modules_gcr}")
string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\2" _gcr_check_modules_gcr_op "${_gcr_check_modules_gcr}")
string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\3" _gcr_check_modules_gcr_ver "${_gcr_check_modules_gcr}")
else(_gcr_check_modules_gcr MATCHES ".*(>=|=|<=).*")
set(_gcr_check_modules_gcr_name "${_gcr_check_modules_gcr}")
set(_gcr_check_modules_gcr_op)
set(_gcr_check_modules_gcr_ver)
endif(_gcr_check_modules_gcr MATCHES ".*(>=|=|<=).*")
set(_gcr_check_prefix "${_prefix}")
_gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" VERSION "" --version )
# _gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" PREFIX "" --prefix )
_gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" LIBRARIES "" --libs )
_gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" CFLAGS "" --cflags )
_gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" ALGORITHMS "" --algorithms )
message(STATUS " found ${_gcr_check_modules_gcr}, version ${_gcrconfig_VERSION}")
# handle the operands
set(_gcr_wrong_version 0)
if (_gcr_check_modules_gcr_op STREQUAL ">=")
if((_gcr_check_modules_gcr_ver VERSION_EQUAL _gcrconfig_VERSION) OR
(_gcrconfig_VERSION VERSION_LESS _gcr_check_modules_gcr_ver ))
message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
set(_gcr_wrong_version 1)
endif()
endif(_gcr_check_modules_gcr_op STREQUAL ">=")
if (_gcr_check_modules_gcr_op STREQUAL "=")
if(_gcr_check_modules_gcr_ver VERSION_EQUAL _gcrconfig_VERSION)
message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
set(_gcr_wrong_version 1)
endif()
endif(_gcr_check_modules_gcr_op STREQUAL "=")
if (_gcr_check_modules_gcr_op STREQUAL "<=")
if((_gcr_check_modules_gcr_ver VERSION_EQUAL _gcrconfig_VERSION) OR
(_gcrconfig_VERSION VERSION_GREATER _gcr_check_modules_gcr_ver))
message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
set(_gcr_wrong_version 1)
endif()
endif(_gcr_check_modules_gcr_op STREQUAL "<=")
if (${_is_required} AND _gcr_wrong_version)
message(FATAL_ERROR "")
endif()
endforeach(_gcr_check_modules_gcr)
_gcrconfig_set(${_prefix}_FOUND 1)
else(GCR_CONFIG_EXECUTABLE)
if (${_is_required})
message(FATAL_ERROR "libgcrypt-config tool not found")
endif (${_is_required})
endif(GCR_CONFIG_EXECUTABLE)
endmacro(_gcr_check_modules_internal)
###
### User visible macro starts here
###
###
macro(gcrypt_check _prefix _module0)
# check cached value
if (NOT DEFINED __gcr_config_checked_${_prefix} OR __gcr_config_checked_${_prefix} LESS ${GCR_CONFIG_VERSION} OR NOT ${_prefix}_FOUND)
_gcrconfig_parse_options (_gcr_modules _gcr_is_required "${_module0}" ${ARGN})
_gcr_check_modules_internal("${_gcr_is_required}" 0 "${_prefix}" ${_gcr_modules})
_gcrconfig_set(__gcr_config_checked_${_prefix} ${GCR_CONFIG_VERSION})
endif(NOT DEFINED __gcr_config_checked_${_prefix} OR __gcr_config_checked_${_prefix} LESS ${GCR_CONFIG_VERSION} OR NOT ${_prefix}_FOUND)
endmacro(gcrypt_check)
###
### Local Variables:
### mode: cmake
### End:
|
