# $Id: mk-2nd.awk,v 1.23 2021/06/17 21:20:30 tom Exp $
##############################################################################
# Copyright 2020,2021 Thomas E. Dickey                                       #
# Copyright 1998-2004,2005 Free Software Foundation, Inc.                    #
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# copy of this software and associated documentation files (the "Software"), #
# to deal in the Software without restriction, including without limitation  #
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# with modifications, sublicense, and/or sell copies of the Software, and to #
# permit persons to whom the Software is furnished to do so, subject to the  #
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   #
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    #
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# holders shall not be used in advertising or otherwise to promote the sale, #
# use or other dealings in this Software without prior written               #
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##############################################################################
#
# Author: Thomas E. Dickey
#
# Generate compile-rules for the modules that we are using in libraries or
# programs.  We are listing them explicitly because we have turned off the
# suffix rules (to force compilation with the appropriate flags).  We could use
# make-recursion but that would result in makefiles that are useless for
# development.
#
# Variables:
#	model directory into which objects are compiled.
#	MODEL (uppercase version of "model"; toupper is not portable)
#	echo (yes iff we will show the $(CC) lines)
#	subset ("none", "base", "base+ext_funcs" or "termlib")
#	crenames ("yes" or "no", flag to control whether -c & -o options are used)
#	cxxrenames ("yes" or "no", flag to control whether -c & -o options are used)
#	traces ("all" or "DEBUG", to control whether tracing is compiled in)
#	srcdir is expanded when "configure --srcdir" was used
#
# Fields in src/modules:
#	$1 = module name
#	$2 = progs|lib|c++
#	$3 = source-directory
#
# Fields in src/modules past $3 are dependencies
#
function in_subset(value) {
		value = " " value " ";
		check = subset;
		gsub("[+]", " ", check);
		check = " " check " ";
		return index(check,value);
	}
BEGIN	{
		found = 0
		using = 0
	}
	/^@/ {
		using = 0
		if (subset == "none") {
			using = 1
		} else if (in_subset($2) > 0) {
			if (using == 0) {
				if (found == 0) {
					print  ""
					print  "# generated by mk-2nd.awk"
					printf "#   model:      %s\n", model
					printf "#   MODEL:      %s\n", MODEL
					printf "#   echo:       %s\n", echo
					printf "#   subset:     %s\n", subset
					printf "#   crenames:   %s\n", crenames
					printf "#   cxxrenames: %s\n", cxxrenames
					printf "#   traces:     %s\n", traces
					printf "#   srcdir:     %s\n", srcdir
				}
				using = 1
			}
		}
	}
	/^[@#]/ {
		next
	}
	$1 ~ /trace/ {
		if (traces != "all" && traces != MODEL && $1 != "lib_trace")
			next
	}
	{
		if ($0 != "" \
		 && using != 0) {
			found = 1
			if ( $1 != "" ) {
				print  ""
				if ( $2 == "c++" ) {
					compile="CXX"
					suffix=".cc"
					use_c_o=cxxrenames
				} else {
					compile="CC"
					suffix=".c"
					use_c_o=crenames
				}
				printf "../%s/%s$o :\t%s/%s%s", model, $1, $3, $1, suffix
				for (n = 4; n <= NF; n++) printf " \\\n\t\t\t%s", $n
				print  ""
				if ( echo == "yes" )
					atsign=""
				else {
					atsign="@"
					printf "\t@echo 'compiling %s (%s)'\n", $1, model
				}
				printf "\t%s", atsign;
				if ( use_c_o != "yes" ) {
					printf "cd ../%s; ", model;
				}
				# The choice here is between
				#	base+ext_funcs and
				#	termlib+ext_tinfo
				# but they may appear in the same value.
				if ( subset ~ /base/ ) {
					mycflags=""
				} else if ( subset ~ /termlib/ ) {
					mycflags=" -DUSE_TERMLIB"
				}
				printf "$(LIBTOOL_COMPILE) $(%s) $(CFLAGS_%s)%s -c ", compile, MODEL, mycflags
				if ( $3 == "." || srcdir == "." ) {
					dir = $3 "/"
					sub("^\\$\\(srcdir\\)/","",dir);
					sub("^\\./","",dir);
					printf "../%s/%s%s%s", name, dir, $1, suffix
				} else {
					printf "%s/%s%s", $3, $1, suffix
				}
				if ( use_c_o == "yes" ) {
					printf " -o ../%s/%s$o", model, $1
				}
			} else {
				printf "%s", $1
				for (n = 2; n <= NF; n++) printf " %s", $n
			}
			print  ""
		}
	}
END	{
		print  ""
	}