Roland Ver. 4.5 Informações Técnicas descarregar pdf (Página 173)

Chapter 15: Makeﬁle Conventions 163

$(PRE_INSTALL) # Pre-install commands follow.

$(POST_INSTALL) # Post-install commands follow.

$(NORMAL_INSTALL) # Normal commands follow.

If you don’t use a category line at the beginning of the install rule, all the commands

are classiﬁed as normal until the ﬁrst category line. If you don’t use any category lines, all

the commands are classiﬁed as normal.

These are the category lines for uninstall:

$(PRE_UNINSTALL) # Pre-uninstall commands follow.

$(POST_UNINSTALL) # Post-uninstall commands follow.

$(NORMAL_UNINSTALL) # Normal commands follow.

Typically, a pre-uninstall command would be used for deleting entries from the Info

directory.

If the install or uninstall target has any dependencies which act as subroutines of

installation, then you should start each dependency’s commands with a category line, and

start the main target’s commands with a category line also. This way, you can ensure

that each command is placed in the right category regardless of which of the dependencies

actually run.

Pre-installation and post-installation commands should not run any programs except for

these:

[ basename bash cat chgrp chmod chown cmp cp dd diff echo

egrep expand expr false fgrep find getopt grep gunzip gzip

hostname install install-info kill ldconfig ln ls md5sum

mkdir mkfifo mknod mv printenv pwd rm rmdir sed sort tee

test touch true uname xargs yes

The reason for distinguishing the commands in this way is for the sake of making binary

packages. Typically a binary package contains all the executables and other ﬁles that need

to be installed, and has its own method of installing them—so it does not need to run the

normal installation commands. But installing the binary package does need to execute the

pre-installation and post-installation commands.

Programs to build binary packages work by extracting the pre-installation and post-

installation commands. Here is one way of extracting the pre-installation commands (the

-s option to make is needed to silence messages about entering subdirectories):

make -s -n install -o all \

PRE_INSTALL=pre-install \

POST_INSTALL=post-install \

NORMAL_INSTALL=normal-install \

| gawk -f pre-install.awk

where the ﬁle pre-install.awk could contain this:

$0 ~ /^(normal-install|post-install)[ \t]*$/ {on = 0}

on {print $0}

$0 ~ /^pre-install[ \t]*$/ {on = 1}

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