diff options
| -rw-r--r-- | Policy_sh.SH | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/Policy_sh.SH b/Policy_sh.SH index 0d9c1dfbc7..fec18b9385 100644 --- a/Policy_sh.SH +++ b/Policy_sh.SH @@ -7,18 +7,33 @@ $startsh # # This file was produced by running the Policy_sh.SH script, which # gets its values from config.sh, which is generally produced by -# running Configure. The Policy.sh file gets overwritten each time -# Configure is run. Any variables you add to Policy.sh will be lost -# unless you copy Policy.sh somewhere else before running Configure. +# running Configure. # # The idea here is to distill in one place the common site-wide # "policy" answers (such as installation directories) that are # to be "sticky". If you keep the file Policy.sh around in # the same directory as you are building Perl, then Configure will # (by default) load up the Policy.sh file just before the -# platform-specific hints file. +# platform-specific hints file and rewrite it at the end. +# +# The sequence of events is as follows: +# A: If you are NOT re-using an old config.sh: +# 1. At start-up, Configure loads up the defaults from the +# os-specific hints/osname_osvers.sh file and any previous +# Policy.sh file. +# 2. At the end, Configure runs Policy_sh.SH, which creates +# Policy.sh, overwriting a previous Policy.sh if necessary. +# +# B: If you are re-using an old config.sh: +# 1. At start-up, Configure loads up the defaults from config.sh, +# ignoring any previous Policy.sh file. +# 2. At the end, Configure runs Policy_sh.SH, which creates +# Policy.sh, overwriting a previous Policy.sh if necessary. +# +# Thus the Policy.sh file gets overwritten each time +# Configure is run. Any variables you add to Policy.sh will be lost +# unless you copy Policy.sh somewhere else before running Configure. # - # Allow Configure command-line overrides; usually these won't be # needed, but something like -Dprefix=/test/location can be quite # useful for testing out new versions. @@ -37,16 +52,37 @@ esac case "\$prefix" in '') prefix='$prefix' ;; esac + +# By default, the next three are the same as \$prefix. +# If the user changes \$prefix, and previously \$siteprefix was the +# same as \$prefix, then change \$siteprefix as well. +# Use similar logic for \$vendorprefix and \$installprefix. + case "\$siteprefix" in -'') siteprefix='$siteprefix' ;; +'') if test "$siteprefix" = "$prefix"; then + siteprefix="\$prefix" + else + siteprefix='$siteprefix' + fi + ;; esac case "\$vendorprefix" in -'') vendorprefix='$vendorprefix' ;; +'') if test "$vendorprefix" = "$prefix"; then + vendorprefix="\$prefix" + else + vendorprefix='$vendorprefix' + fi + ;; esac # Where installperl puts things. case "\$installprefix" in -'') installprefix='$installprefix' ;; +'') if test "$installprefix" = "$prefix"; then + installprefix="\$prefix" + else + installprefix='$installprefix' + fi + ;; esac # Installation directives. Note that each one comes in three flavors. |