Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 1 | # - a gcrypt-config module for CMake
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| 2 | #
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| 3 | # Usage:
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| 4 | # gcrypt_check(<PREFIX> [REQUIRED] <MODULE>)
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| 5 | # checks if gcrypt is avialable
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| 6 | #
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| 7 | # When the 'REQUIRED' argument was set, macros will fail with an error
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| 8 | # when gcrypt could not be found.
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| 9 | #
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| 10 | # It sets the following variables:
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| 11 | # GCRYPT_CONFIG_FOUND ... true if libgcrypt-config works on the system
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| 12 | # GCRYPT_CONFIG_EXECUTABLE ... pathname of the libgcrypt-config program
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| 13 | # <PREFIX>_FOUND ... set to 1 if libgcrypt exist
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| 14 | # <PREFIX>_LIBRARIES ... the libraries
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| 15 | # <PREFIX>_CFLAGS ... all required cflags
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| 16 | # <PREFIX>_ALGORITHMS ... the algorithms that this libgcrypt supports
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| 17 | # <PREFIX>_VERSION ... gcrypt's version
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| 18 | #
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| 19 | # Examples:
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| 20 | # gcrypt_check (GCRYPT gcrypt)
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| 21 | # Check if a version of gcrypt is available, issues a warning
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| 22 | # if not.
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| 23 | #
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| 24 | # gcrypt_check (GCRYPT REQUIRED gcrypt)
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| 25 | # Check if a version of gcrypt is available and fails
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| 26 | # if not.
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| 27 | #
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| 28 | # gcrypt_check (GCRYPT gcrypt>=1.4)
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| 29 | # requires at least version 1.4 of gcrypt and defines e.g.
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| 30 | # GCRYPT_VERSION=1.4.4. Issues a warning if a lower version
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| 31 | # is available only.
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| 32 | #
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| 33 | # gcrypt_check (GCRYPT REQUIRED gcrypt>=1.4.4)
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| 34 | # requires at least version 1.4.4 of gcrypt and fails if
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| 35 | # only gcrypt 1.4.3 or lower is available only.
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| 36 | #
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| 37 |
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| 38 | # Copyright (C) 2010 Werner Dittmann <werner.dittmann@t-online.de>
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| 39 | #
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| 40 | # Redistribution and use, with or without modification, are permitted
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| 41 | # provided that the following conditions are met:
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| 42 | #
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| 43 | # 1. Redistributions must retain the above copyright notice, this
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| 44 | # list of conditions and the following disclaimer.
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| 45 | # 2. The name of the author may not be used to endorse or promote
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| 46 | # products derived from this software without specific prior
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| 47 | # written permission.
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| 48 | #
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| 49 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 50 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 51 | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 52 | # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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| 53 | # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 54 | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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| 55 | # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 56 | # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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| 57 | # IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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| 58 | # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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| 59 | # IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 60 | #
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| 61 | # This is a much edited and simplified variant of the original UsePkgConfig.cmake
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| 62 | # from Enrico Scholz
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| 63 | # Copyright (C) 2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
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| 64 | #
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| 65 |
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| 66 | ### Common stuff ####
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| 67 | set(GCR_CONFIG_VERSION 1)
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| 68 | set(GCR_CONFIG_FOUND 0)
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| 69 |
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| 70 | find_program(GCR_CONFIG_EXECUTABLE NAMES libgcrypt-config --version DOC "libgcrypt-config executable")
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| 71 | mark_as_advanced(GCR_CONFIG_EXECUTABLE)
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| 72 |
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| 73 | if(GCR_CONFIG_EXECUTABLE)
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| 74 | set(GCR_CONFIG_FOUND 1)
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| 75 | endif(GCR_CONFIG_EXECUTABLE)
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| 76 |
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| 77 |
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| 78 | # Unsets the given variables
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| 79 | macro(_gcrconfig_unset var)
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| 80 | set(${var} "" CACHE INTERNAL "")
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| 81 | endmacro(_gcrconfig_unset)
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| 82 |
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| 83 | macro(_gcrconfig_set var value)
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| 84 | set(${var} ${value} CACHE INTERNAL "")
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| 85 | endmacro(_gcrconfig_set)
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| 86 |
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| 87 | # Invokes libgcrypt-config, cleans up the result and sets variables
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| 88 | macro(_gcrconfig_invoke _gcrlist _prefix _varname _regexp)
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| 89 | set(_gcrconfig_invoke_result)
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| 90 |
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| 91 | execute_process(
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| 92 | COMMAND ${GCR_CONFIG_EXECUTABLE} ${ARGN}
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| 93 | OUTPUT_VARIABLE _gcrconfig_invoke_result
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| 94 | RESULT_VARIABLE _gcrconfig_failed)
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| 95 |
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| 96 | if (_gcrconfig_failed)
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| 97 | set(_gcrconfig_${_varname} "")
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| 98 | _gcrconfig_unset(${_prefix}_${_varname})
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| 99 | else(_gcrconfig_failed)
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| 100 | string(REGEX REPLACE "[\r\n]" " " _gcrconfig_invoke_result "${_gcrconfig_invoke_result}")
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| 101 | string(REGEX REPLACE " +$" "" _gcrconfig_invoke_result "${_gcrconfig_invoke_result}")
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| 102 |
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| 103 | if (NOT ${_regexp} STREQUAL "")
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| 104 | string(REGEX REPLACE "${_regexp}" " " _gcrconfig_invoke_result "${_gcrconfig_invoke_result}")
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| 105 | endif(NOT ${_regexp} STREQUAL "")
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| 106 |
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| 107 | separate_arguments(_gcrconfig_invoke_result)
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| 108 |
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| 109 | #message(STATUS " ${_varname} ... ${_gcrconfig_invoke_result}")
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| 110 | set(_gcrconfig_${_varname} ${_gcrconfig_invoke_result})
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| 111 | _gcrconfig_set(${_prefix}_${_varname} "${_gcrconfig_invoke_result}")
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| 112 | endif(_gcrconfig_failed)
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| 113 | endmacro(_gcrconfig_invoke)
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| 114 |
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| 115 | macro(_gcrconfig_invoke_dyn _gcrlist _prefix _varname cleanup_regexp)
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| 116 | _gcrconfig_invoke("${_gcrlist}" ${_prefix} ${_varname} "${cleanup_regexp}" ${ARGN})
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| 117 | endmacro(_gcrconfig_invoke_dyn)
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| 118 |
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| 119 | # Splits given arguments into options and a package list
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| 120 | macro(_gcrconfig_parse_options _result _is_req)
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| 121 | set(${_is_req} 0)
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| 122 |
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| 123 | foreach(_gcr ${ARGN})
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| 124 | if (_gcr STREQUAL "REQUIRED")
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| 125 | set(${_is_req} 1)
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| 126 | endif (_gcr STREQUAL "REQUIRED")
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| 127 | endforeach(_gcr ${ARGN})
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| 128 |
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| 129 | set(${_result} ${ARGN})
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| 130 | list(REMOVE_ITEM ${_result} "REQUIRED")
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| 131 | endmacro(_gcrconfig_parse_options)
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| 132 |
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| 133 | ###
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| 134 | macro(_gcr_check_modules_internal _is_required _is_silent _prefix)
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| 135 | _gcrconfig_unset(${_prefix}_FOUND)
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| 136 | _gcrconfig_unset(${_prefix}_VERSION)
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| 137 | _gcrconfig_unset(${_prefix}_PREFIX)
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| 138 | _gcrconfig_unset(${_prefix}_LIBDIR)
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| 139 | _gcrconfig_unset(${_prefix}_LIBRARIES)
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| 140 | _gcrconfig_unset(${_prefix}_CFLAGS)
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| 141 | _gcrconfig_unset(${_prefix}_ALGORITHMS)
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| 142 |
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| 143 | # create a better addressable variable of the modules and calculate its size
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| 144 | set(_gcr_check_modules_list ${ARGN})
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| 145 | list(LENGTH _gcr_check_modules_list _gcr_check_modules_cnt)
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| 146 |
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| 147 | if(GCR_CONFIG_EXECUTABLE)
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| 148 | # give out status message telling checked module
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| 149 | if (NOT ${_is_silent})
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| 150 | message(STATUS "checking for module '${_gcr_check_modules_list}'")
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| 151 | endif(NOT ${_is_silent})
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| 152 |
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| 153 | # iterate through module list and check whether they exist and match the required version
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| 154 | foreach (_gcr_check_modules_gcr ${_gcr_check_modules_list})
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| 155 |
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| 156 | # check whether version is given
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| 157 | if (_gcr_check_modules_gcr MATCHES ".*(>=|=|<=).*")
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| 158 | string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\1" _gcr_check_modules_gcr_name "${_gcr_check_modules_gcr}")
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| 159 | string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\2" _gcr_check_modules_gcr_op "${_gcr_check_modules_gcr}")
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| 160 | string(REGEX REPLACE "(.*[^><])(>=|=|<=)(.*)" "\\3" _gcr_check_modules_gcr_ver "${_gcr_check_modules_gcr}")
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| 161 | else(_gcr_check_modules_gcr MATCHES ".*(>=|=|<=).*")
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| 162 | set(_gcr_check_modules_gcr_name "${_gcr_check_modules_gcr}")
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| 163 | set(_gcr_check_modules_gcr_op)
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| 164 | set(_gcr_check_modules_gcr_ver)
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| 165 | endif(_gcr_check_modules_gcr MATCHES ".*(>=|=|<=).*")
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| 166 |
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| 167 | set(_gcr_check_prefix "${_prefix}")
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| 168 |
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| 169 | _gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" VERSION "" --version )
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| 170 | # _gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" PREFIX "" --prefix )
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| 171 | _gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" LIBRARIES "" --libs )
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| 172 | _gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" CFLAGS "" --cflags )
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| 173 | _gcrconfig_invoke(${_gcr_check_modules_gcr_name} "${_gcr_check_prefix}" ALGORITHMS "" --algorithms )
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| 174 |
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| 175 | message(STATUS " found ${_gcr_check_modules_gcr}, version ${_gcrconfig_VERSION}")
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| 176 | # handle the operands
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| 177 | set(_gcr_wrong_version 0)
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| 178 | if (_gcr_check_modules_gcr_op STREQUAL ">=")
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| 179 | if(_gcr_check_modules_gcr_ver VERSION_EQUAL _gcrconfig_VERSION)
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| 180 | message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
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| 181 | set(_gcr_wrong_version 1)
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| 182 | endif()
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| 183 |
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| 184 | if(_gcrconfig_VERSION VERSION_LESS _gcr_check_modules_gcr_ver )
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| 185 | message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
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| 186 | set(_gcr_wrong_version 1)
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| 187 | endif()
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| 188 | endif(_gcr_check_modules_gcr_op STREQUAL ">=")
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| 189 |
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| 190 | if (_gcr_check_modules_gcr_op STREQUAL "=")
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| 191 | if(_gcr_check_modules_gcr_ver VERSION_EQUAL _gcrconfig_VERSION)
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| 192 | message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
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| 193 | set(_gcr_wrong_version 1)
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| 194 | endif()
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| 195 | endif(_gcr_check_modules_gcr_op STREQUAL "=")
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| 196 |
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| 197 | if (_gcr_check_modules_gcr_op STREQUAL "<=")
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| 198 | if(_gcr_check_modules_gcr_ver VERSION_EQUAL _gcrconfig_VERSION)
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| 199 | message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
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| 200 | set(_gcr_wrong_version 1)
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| 201 | endif()
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| 202 |
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| 203 | if(_gcrconfig_VERSION VERSION_GREATER _gcr_check_modules_gcr_ver)
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| 204 | message(STATUS " gcrypt wrong version: required: ${_gcr_check_modules_gcr_op}${_gcr_check_modules_gcr_ver}, found: ${_gcrconfig_VERSION}")
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| 205 | set(_gcr_wrong_version 1)
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| 206 | endif()
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| 207 | endif(_gcr_check_modules_gcr_op STREQUAL "<=")
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| 208 | if (${_is_required} AND _gcr_wrong_version)
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| 209 | message(FATAL_ERROR "")
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| 210 | endif()
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| 211 |
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| 212 | endforeach(_gcr_check_modules_gcr)
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| 213 | _gcrconfig_set(${_prefix}_FOUND 1)
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| 214 |
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| 215 | else(GCR_CONFIG_EXECUTABLE)
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| 216 | if (${_is_required})
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| 217 | message(FATAL_ERROR "libgcrypt-config tool not found")
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| 218 | endif (${_is_required})
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| 219 | endif(GCR_CONFIG_EXECUTABLE)
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| 220 | endmacro(_gcr_check_modules_internal)
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| 221 |
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| 222 | ###
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| 223 | ### User visible macro starts here
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| 224 | ###
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| 225 |
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| 226 | ###
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| 227 | macro(gcr_check _prefix _module0)
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| 228 | # check cached value
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| 229 | if (NOT DEFINED __gcr_config_checked_${_prefix} OR __gcr_config_checked_${_prefix} LESS ${GCR_CONFIG_VERSION} OR NOT ${_prefix}_FOUND)
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| 230 | _gcrconfig_parse_options (_gcr_modules _gcr_is_required "${_module0}" ${ARGN})
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| 231 | _gcr_check_modules_internal("${_gcr_is_required}" 0 "${_prefix}" ${_gcr_modules})
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| 232 |
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| 233 | _gcrconfig_set(__gcr_config_checked_${_prefix} ${GCR_CONFIG_VERSION})
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| 234 | endif(NOT DEFINED __gcr_config_checked_${_prefix} OR __gcr_config_checked_${_prefix} LESS ${GCR_CONFIG_VERSION} OR NOT ${_prefix}_FOUND)
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| 235 | endmacro(gcr_check)
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| 236 |
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| 237 | ###
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| 238 |
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| 239 | ### Local Variables:
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| 240 | ### mode: cmake
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| 241 | ### End:
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