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|
;# $Id: configure.pl 25 2008-05-28 11:19:25Z rmanfredi $
;#
;# Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
;#
;# You may redistribute only under the terms of the Artistic Licence,
;# as specified in the README file that comes with the distribution.
;# You may reuse parts of this distribution only within the terms of
;# that same Artistic Licence; a copy of which may be found at the root
;# of the source tree for dist 4.0.
;#
;# $Log: configure.pl,v $
;# Revision 3.0.1.5 1995/01/30 14:47:15 ram
;# patch49: removed old "do name()" routine call constructs
;#
;# Revision 3.0.1.4 1995/01/11 15:40:02 ram
;# patch45: now allows @if statements for the add.Config_sh unit inclusion
;#
;# Revision 3.0.1.3 1994/05/06 15:21:23 ram
;# patch23: cleaned up the 'prepend' command
;#
;# Revision 3.0.1.2 1994/01/24 14:23:21 ram
;# patch16: new general <\$variable> macro substitutions in wiped units
;#
;# Revision 3.0.1.1 1993/10/16 13:54:02 ram
;# patch12: added support for ?M: lines and confmagic.h production
;# patch12: new Makefile command cm_h_weed
;#
;# Revision 3.0 1993/08/18 12:10:20 ram
;# Baseline for dist 3.0 netwide release.
;#
;#
;# This file is the heart of metaconfig. We generate a Configure script using
;# the informations gathered in the @cmdwanted array. A unit is expected to have
;# its path written in the %Unit array (indexing is done with the unit's name
;# without the .U extension).
;#
;# The units are run through a built-in interpreter before being written to
;# the Configure script.
;#
# Create the Configure script
sub create_configure {
print "Creating Configure...\n" unless $opt_s;
open(CONFIGURE,">Configure") || die "Can't create Configure: $!\n";
open(CONF_H,">config_h.SH") || die "Can't create config_h.SH: $!\n";
if ($opt_M) {
open(MAGIC_H,">confmagic.h") || die "Can't create confmagic.h: $!\n";
}
chdir('.MT') || die "Can't cd to .MT: $!\n";
for (@cmdwanted) {
&process_command($_); # Run the makefile command
}
chdir($WD) || die "Can't cd back to $WD\n";
close CONFIGURE;
print CONF_H "#endif\n"; # Close the opened #ifdef (see Config_h.U)
print CONF_H "!GROK!THIS!\n";
close CONF_H;
if ($opt_M) {
print MAGIC_H "#endif\n"; # Close the opened #ifdef (see Magic_h.U)
close MAGIC_H;
}
`chmod +x Configure`;
}
# Process a Makefile 'pick' command
sub process_command {
local($cmd, $target, $unit_name) = split(' ', $_[0]);
local($name) = $unit_name . '.U'; # Restore missing .U
local($file) = $name; # Where unit is located
unless ($file =~ m|^\./|) { # Unit produced earlier by metaconfig
$file = $Unit{$unit_name}; # Fetch unit from U directory
}
if (defined $Obsolete{$name}) { # Signal use of an obsolete unit
warn "\tObsolete unit $name is used:\n";
local(@msg) = split(/\n/, $Obsolete{$name});
foreach $msg (@msg) {
warn "\t $msg\n";
}
}
die "Can't open $file.\n" unless open(UNIT, $file);
print "\t$cmd $file\n" if $opt_v;
&init_interp; # Initializes the interpreter
# The 'add' command adds the unit to Configure.
if ($cmd eq 'add') {
while (<UNIT>) {
print CONFIGURE unless &skipped || !&interpret($_);
}
}
# The 'weed' command adds the unit to Configure, but
# makes some tests for the lines starting with '?' or '%'.
# These lines are kept only if the symbol is wanted.
elsif ($cmd eq 'weed') {
while (<UNIT>) {
if (/^\?(\w+):/) {
s/^\?\w+:// if $symwanted{$1};
}
if (/^%(\w+):/) {
s/^%\w+:// if $condwanted{$1};
}
print CONFIGURE unless &skipped || !&interpret($_);
}
}
# The 'wipe' command adds the unit to Configure, but
# also substitues some hardwired macros.
elsif ($cmd eq 'wipe') {
while (<UNIT>) {
s/<PACKAGENAME>/$package/g;
s/<MAINTLOC>/$maintloc/g;
s/<VERSION>/$version/g; # This is metaconfig's version
s/<REVISION>/$revision/g; # And revision information
warn "\"$file\": usage of <PATCHLEVEL> is deprecated\n"
if s/<PATCHLEVEL>/$patchlevel/g;
s/<DATE>/$date/g;
s/<BASEREV>/$baserev/g;
s/<\$(\w+)>/eval("\$$1")/ge; # <$var> -> $var substitution
print CONFIGURE unless &skipped || !&interpret($_);
}
}
# The 'add.Null' command adds empty initializations
# to Configure for all the shell variable used.
elsif ($cmd eq 'add.Null') {
for (sort @Master) {
if (/^\?(\w+):/) {
s/^\?\w+:// if $symwanted{$1};
}
print CONFIGURE unless &skipped;
}
for (sort @Cond) {
print CONFIGURE "$_=''\n"
unless $symwanted{$_} || $hasdefault{$_};
}
while (<UNIT>) {
print CONFIGURE unless &skipped || !&interpret($_);
}
print CONFIGURE "CONFIG=''\n\n";
}
# The 'add.Config_sh' command fills in the production of
# the config.sh script within Configure. Only the used
# variable are added, the conditional ones are skipped.
elsif ($cmd eq 'add.Config_sh') {
while (<UNIT>) {
print CONFIGURE unless &skipped || !&interpret($_);
}
for (sort @Master) {
if (/^\?(\w+):/) {
# Can't use $shmaster, because config.sh must
# also contain some internal defaults used by
# Configure (e.g. nm_opt, libc, etc...).
s/^\?\w+:// if $symwanted{$1};
}
s/^(\w+)=''/$1='\$$1'/;
print CONFIGURE unless &skipped;
}
}
# The 'close.Config_sh' command adds the final EOT line at
# the end of the here-document construct which produces the
# config.sh file within Configure.
elsif ($cmd eq 'close.Config_sh') {
print CONFIGURE "EOT\n\n"; # Ends up file
}
# The 'c_h_weed' command produces the config_h.SH file.
# Only the necessary lines are kept. If no conditional line is
# ever printed, then the file is useless and will be removed.
elsif ($cmd eq 'c_h_weed') {
$printed = 0;
while (<UNIT>) {
if (/^\?(\w+):/) {
s/^\?\w+:// if $cmaster{$1} || $symwanted{$1};
}
unless (&skipped || !&interpret($_)) {
if (/^$/) {
print CONF_H "\n" if $printed;
$printed = 0;
} else {
print CONF_H;
++$printed;
}
}
}
}
# The 'cm_h_weed' command produces the confmagic.h file.
# Only the necessary lines are kept. If no conditional line is
# ever printed, then the file is useless and will be removed.
elsif ($cmd eq 'cm_h_weed') {
if ($opt_M) {
$printed = 0;
while (<UNIT>) {
if (/^\?(\w+):/) {
s/^\?\w+:// if $cmaster{$1} || $symwanted{$1};
}
unless (&skipped || !&interpret($_)) {
if (/^$/) {
print MAGIC_H "\n" if $printed;
$printed = 0;
} else {
print MAGIC_H;
++$printed;
}
}
}
}
}
# The 'prepend' command will add the content of the target to
# the current file (held in $file, the one which UNIT refers to),
# if the file is not empty.
elsif ($cmd eq 'prepend') {
if (-s $file) {
open(PREPEND, ">.prepend") ||
die "Can't create .MT/.prepend.\n";
open(TARGET, $Unit{$target}) ||
die "Can't open $Unit{$target}.\n";
while (<TARGET>) {
print PREPEND unless &skipped;
}
print PREPEND <UNIT>; # Now add original file contents
close PREPEND;
close TARGET;
rename('.prepend', $file) ||
die "Can't rename .prepend into $file.\n";
}
}
# Command not found
else {
die "Unrecognized command from Makefile: $cmd\n";
}
&check_state; # Make sure there are no pending statements
close UNIT;
}
# Skip lines starting with ? or %, including all the following continuation
# lines, if any. Return 0 if the line was not to be skipped, 1 otherwise.
sub skipped {
return 0 unless /^\?|^%/;
&complete_line(UNIT) if /\\\s*$/; # Swallow continuation lines
1;
}
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