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| 129 | .\" ======================================================================== |
| 130 | .\" |
| 131 | .IX Title "ExtUtils::Mksymlists 3" |
| 132 | .TH ExtUtils::Mksymlists 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide" |
| 133 | .SH "NAME" |
| 134 | ExtUtils::Mksymlists \- write linker options files for dynamic extension |
| 135 | .SH "SYNOPSIS" |
| 136 | .IX Header "SYNOPSIS" |
| 137 | .Vb 5 |
| 138 | \& use ExtUtils::Mksymlists; |
| 139 | \& Mksymlists({ NAME => $name , |
| 140 | \& DL_VARS => [ $var1, $var2, $var3 ], |
| 141 | \& DL_FUNCS => { $pkg1 => [ $func1, $func2 ], |
| 142 | \& $pkg2 => [ $func3 ] }); |
| 143 | .Ve |
| 144 | .SH "DESCRIPTION" |
| 145 | .IX Header "DESCRIPTION" |
| 146 | \&\f(CW\*(C`ExtUtils::Mksymlists\*(C'\fR produces files used by the linker under some OSs |
| 147 | during the creation of shared libraries for dynamic extensions. It is |
| 148 | normally called from a MakeMaker-generated Makefile when the extension |
| 149 | is built. The linker option file is generated by calling the function |
| 150 | \&\f(CW\*(C`Mksymlists\*(C'\fR, which is exported by default from \f(CW\*(C`ExtUtils::Mksymlists\*(C'\fR. |
| 151 | It takes one argument, a list of key-value pairs, in which the following |
| 152 | keys are recognized: |
| 153 | .IP "\s-1DLBASE\s0" 4 |
| 154 | .IX Item "DLBASE" |
| 155 | This item specifies the name by which the linker knows the |
| 156 | extension, which may be different from the name of the |
| 157 | extension itself (for instance, some linkers add an '_' to the |
| 158 | name of the extension). If it is not specified, it is derived |
| 159 | from the \s-1NAME\s0 attribute. It is presently used only by \s-1OS2\s0 and Win32. |
| 160 | .IP "\s-1DL_FUNCS\s0" 4 |
| 161 | .IX Item "DL_FUNCS" |
| 162 | This is identical to the \s-1DL_FUNCS\s0 attribute available via MakeMaker, |
| 163 | from which it is usually taken. Its value is a reference to an |
| 164 | associative array, in which each key is the name of a package, and |
| 165 | each value is an a reference to an array of function names which |
| 166 | should be exported by the extension. For instance, one might say |
| 167 | \&\f(CW\*(C`DL_FUNCS => { Homer::Iliad => [ qw(trojans greeks) ], |
| 168 | Homer::Odyssey => [ qw(travellers family suitors) ] }\*(C'\fR. The |
| 169 | function names should be identical to those in the \s-1XSUB\s0 code; |
| 170 | \&\f(CW\*(C`Mksymlists\*(C'\fR will alter the names written to the linker option |
| 171 | file to match the changes made by \fIxsubpp\fR. In addition, if |
| 172 | none of the functions in a list begin with the string \fBboot_\fR, |
| 173 | \&\f(CW\*(C`Mksymlists\*(C'\fR will add a bootstrap function for that package, |
| 174 | just as xsubpp does. (If a \fBboot_<pkg>\fR function is |
| 175 | present in the list, it is passed through unchanged.) If |
| 176 | \&\s-1DL_FUNCS\s0 is not specified, it defaults to the bootstrap |
| 177 | function for the extension specified in \s-1NAME\s0. |
| 178 | .IP "\s-1DL_VARS\s0" 4 |
| 179 | .IX Item "DL_VARS" |
| 180 | This is identical to the \s-1DL_VARS\s0 attribute available via MakeMaker, |
| 181 | and, like \s-1DL_FUNCS\s0, it is usually specified via MakeMaker. Its |
| 182 | value is a reference to an array of variable names which should |
| 183 | be exported by the extension. |
| 184 | .IP "\s-1FILE\s0" 4 |
| 185 | .IX Item "FILE" |
| 186 | This key can be used to specify the name of the linker option file |
| 187 | (minus the OS-specific extension), if for some reason you do not |
| 188 | want to use the default value, which is the last word of the \s-1NAME\s0 |
| 189 | attribute (\fIe.g.\fR for \f(CW\*(C`Tk::Canvas\*(C'\fR, \s-1FILE\s0 defaults to \f(CW\*(C`Canvas\*(C'\fR). |
| 190 | .IP "\s-1FUNCLIST\s0" 4 |
| 191 | .IX Item "FUNCLIST" |
| 192 | This provides an alternate means to specify function names to be |
| 193 | exported from the extension. Its value is a reference to an |
| 194 | array of function names to be exported by the extension. These |
| 195 | names are passed through unaltered to the linker options file. |
| 196 | Specifying a value for the \s-1FUNCLIST\s0 attribute suppresses automatic |
| 197 | generation of the bootstrap function for the package. To still create |
| 198 | the bootstrap name you have to specify the package name in the |
| 199 | \&\s-1DL_FUNCS\s0 hash: |
| 200 | .Sp |
| 201 | .Vb 3 |
| 202 | \& Mksymlists({ NAME => $name , |
| 203 | \& FUNCLIST => [ $func1, $func2 ], |
| 204 | \& DL_FUNCS => { $pkg => [] } }); |
| 205 | .Ve |
| 206 | .IP "\s-1IMPORTS\s0" 4 |
| 207 | .IX Item "IMPORTS" |
| 208 | This attribute is used to specify names to be imported into the |
| 209 | extension. It is currently only used by \s-1OS/2\s0 and Win32. |
| 210 | .IP "\s-1NAME\s0" 4 |
| 211 | .IX Item "NAME" |
| 212 | This gives the name of the extension (\fIe.g.\fR \f(CW\*(C`Tk::Canvas\*(C'\fR) for which |
| 213 | the linker option file will be produced. |
| 214 | .PP |
| 215 | When calling \f(CW\*(C`Mksymlists\*(C'\fR, one should always specify the \s-1NAME\s0 |
| 216 | attribute. In most cases, this is all that's necessary. In |
| 217 | the case of unusual extensions, however, the other attributes |
| 218 | can be used to provide additional information to the linker. |
| 219 | .SH "AUTHOR" |
| 220 | .IX Header "AUTHOR" |
| 221 | Charles Bailey \fI<bailey@newman.upenn.edu>\fR |
| 222 | .SH "REVISION" |
| 223 | .IX Header "REVISION" |
| 224 | Last revised 14\-Feb\-1996, for Perl 5.002. |