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Diffstat (limited to 'mcon/pl/configure.pl')
| -rw-r--r-- | mcon/pl/configure.pl | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/mcon/pl/configure.pl b/mcon/pl/configure.pl new file mode 100644 index 0000000..d99d74b --- /dev/null +++ b/mcon/pl/configure.pl @@ -0,0 +1,248 @@ +;# $Id$ +;# +;# 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 $file.($name for target $target): $!\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 $Unit{$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; +} + |