PATH_LIST is a space-separated list of colon-separated triplets of the form ’FROM:TO:RESULT’. This function iterates over these triplets and set $RESULT to the relative path from $FROM to $TO. Note that $FROM and $TO needs to be absolute filenames for this macro to success.
first=/usr/local/bin second=/usr/local/share AX_COMPUTE_RELATIVE_PATHS([first:second:fs second:first:sf]) # $fs is set to ../share # $sf is set to ../bin
$FROM and $TO are both eval’ed recursively and normalized, this means that you can call this macro with autoconf’s dirnames like ‘prefix’ or ‘datadir’. For example:
AX_COMPUTE_RELATIVE_PATHS should also works with DOS filenames.
You may want to use this macro in order to make your package relocatable. Instead of hardcoding $datadir into your programs just encode $bin_to_data and try to determine $bindir at run-time.
This macro requires AX_NORMALIZE_PATH and AX_RECURSIVE_EVAL.
Download the latest version of ax_compute_relative_paths.m4 or browse the macro’s revision history.
Copyright © 2008 Alexandre Duret-Lutz firstname.lastname@example.org
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