Using autoconf
Autoconf uses the m4 macro processor to translate the configure.in template into the configure script. The configure script is run by /bin/sh (i.e., the Bourne Shell). Creating the configure.in template is simplified by a standard m4 macro library that is distributed with autoconf. In addition, a Tcl distribution contains a tcl.m4 file that has additional autoconf macros. Among other things, these macros support the standard configure flags described in Table 45-3.
Creating configure templates can be complex and confusing. Mostly this is because a macro processor is being used to create a shell script. The days I have spent trying to change the Tcl configuration files really made me appreciate the simplicity of Tcl! Fortunately, ...
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