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annotate m4/pkg.m4 @ 20827:e54ecb33727e

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lo-array-gripes.cc: Remove FIXME's related to buffer size. * lo-array-gripes.cc: Remove FIXME's related to buffer size. Shorten sprintf buffers from 100 to 64 characters (still well more than 19 required). Use 'const' decorator on constant value for clarity. Remove extra space between variable and array bracket.
author Rik <rik@octave.org>
date Mon, 12 Oct 2015 21:13:47 -0700
parents 4b82664f526b
children
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15360
4b82664f526b build: Move non-Octave Autoconf pkg macros from acinclude.m4 to a separate file.
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1 # pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
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2 #
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3 # Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
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4 #
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5 # This program is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 2 of the License, or
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8 # (at your option) any later version.
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9 #
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10 # This program is distributed in the hope that it will be useful, but
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11 # WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 # General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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18 #
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19 # As a special exception to the GNU General Public License, if you
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20 # distribute this file as part of a program that contains a
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21 # configuration script generated by Autoconf, you may include it under
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22 # the same distribution terms that you use for the rest of that program.
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23
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24 # PKG_PROG_PKG_CONFIG([MIN-VERSION])
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25 # ----------------------------------
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26 AC_DEFUN([PKG_PROG_PKG_CONFIG],
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27 [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
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28 m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
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29 AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
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30 if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
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31 AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
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32 fi
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33 if test -n "$PKG_CONFIG"; then
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34 _pkg_min_version=m4_default([$1], [0.9.0])
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35 AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
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36 if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
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37 AC_MSG_RESULT([yes])
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38 else
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39 AC_MSG_RESULT([no])
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40 PKG_CONFIG=""
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41 fi
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42
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43 fi[]dnl
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44 ])# PKG_PROG_PKG_CONFIG
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45
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46 # PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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47 #
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48 # Check to see whether a particular set of modules exists. Similar
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49 # to PKG_CHECK_MODULES(), but does not set variables or print errors.
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50 #
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51 #
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52 # Similar to PKG_CHECK_MODULES, make sure that the first instance of
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53 # this or PKG_CHECK_MODULES is called, or make sure to call
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54 # PKG_CHECK_EXISTS manually
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55 # --------------------------------------------------------------
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56 AC_DEFUN([PKG_CHECK_EXISTS],
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57 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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58 if test -n "$PKG_CONFIG" && \
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59 AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
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60 m4_ifval([$2], [$2], [:])
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61 m4_ifvaln([$3], [else
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62 $3])dnl
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63 fi])
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64
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65
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66 # _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
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67 # ---------------------------------------------
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68 m4_define([_PKG_CONFIG],
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69 [if test -n "$PKG_CONFIG"; then
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70 if test -n "$$1"; then
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71 pkg_cv_[]$1="$$1"
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72 else
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73 PKG_CHECK_EXISTS([$3],
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74 [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
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75 [pkg_failed=yes])
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76 fi
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77 else
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78 pkg_failed=untried
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79 fi[]dnl
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80 ])# _PKG_CONFIG
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81
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82 # _PKG_SHORT_ERRORS_SUPPORTED
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83 # -----------------------------
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84 AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
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85 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])
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86 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
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87 _pkg_short_errors_supported=yes
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88 else
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89 _pkg_short_errors_supported=no
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90 fi[]dnl
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91 ])# _PKG_SHORT_ERRORS_SUPPORTED
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92
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93
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94 # PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
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95 # [ACTION-IF-NOT-FOUND])
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96 #
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97 #
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98 # Note that if there is a possibility the first call to
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99 # PKG_CHECK_MODULES might not happen, you should be sure to include an
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100 # explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
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101 #
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102 #
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103 # --------------------------------------------------------------
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104 AC_DEFUN([PKG_CHECK_MODULES],
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105 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
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106 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
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107 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
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108
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109 pkg_failed=no
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110 AC_MSG_CHECKING([for $1])
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111
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112 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
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113 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
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114
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115 m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
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116 and $1[]_LIBS to avoid the need to call pkg-config.
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117 See the pkg-config man page for more details.])
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118
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119 if test $pkg_failed = yes; then
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120 _PKG_SHORT_ERRORS_SUPPORTED
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121 if test $_pkg_short_errors_supported = yes; then
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122 $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"`
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123 else
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124 $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
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125 fi
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126 # Put the nasty error message in config.log where it belongs
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127 echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
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128
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129 ifelse([$4], , [AC_MSG_ERROR(dnl
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130 [Package requirements ($2) were not met:
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131
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132 $$1_PKG_ERRORS
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133
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134 Consider adjusting the PKG_CONFIG_PATH environment variable if you
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135 installed software in a non-standard prefix.
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136
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137 _PKG_TEXT
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138 ])],
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139 [AC_MSG_RESULT([no])
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140 $4])
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141 elif test $pkg_failed = untried; then
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142 ifelse([$4], , [AC_MSG_FAILURE(dnl
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143 [The pkg-config script could not be found or is too old. Make sure it
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144 is in your PATH or set the PKG_CONFIG environment variable to the full
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145 path to pkg-config.
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146
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147 _PKG_TEXT
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148
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149 To get pkg-config, see <http://pkg-config.freedesktop.org/>.])],
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150 [$4])
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151 else
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152 $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
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153 $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
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154 AC_MSG_RESULT([yes])
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155 ifelse([$3], , :, [$3])
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156 fi[]dnl
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157 ])# PKG_CHECK_MODULES