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install-sh -C

From: Akim Demaille
Subject: install-sh -C
Date: Sun, 22 Oct 2006 11:04:39 +0200

I work on a set of projects that share header files, and I have
found it quite useful to spare compilation cycles by using

AC_SUBST([INSTALL_HEADER], ['$(SHELL) $(install_sh_DATA) -C'])

i.e., adding an option -C to install-sh to have a behavior
similar to move-if-change.  The name of the option is modeled
after BSD install's -C.  The later is able to upgrade perms
when they have changed (but the contents are the same), while
preserving the time stamps.

install-sh tries to avoid changing owner groups etc. on the
installed file, rather it runs these commands on a tmp file.
So I did not try to reproduce the behavior of BSD install.
GNU install does not seem to support a similar option.

Attachment: diffs.patch
Description: Binary data

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