bringing in awk preprocessor from rusty-snake

src/man/Makefile.in

@@ -1,17 +1,10 @@
 all: firecfg.man firejail.man firejail-login.man firejail-users.man firejail-profile.man firemon.man
-
 include ../common.mk
 
-%.o : %.c $(H_FILE_LIST)
-	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(INCLUDE) -c $< -o $@
+%.man: %.txt
+	./preproc.awk $(MANFLAGS) < $< > $@
 
-preproc: $(OBJS)
-	$(CC)  $(LDFLAGS) -o $@ $(OBJS) $(LIBS) $(EXTRA_LDFLAGS)
-
-%.man: %.txt preproc
-	./preproc $(MANFLAGS) $<
-
-clean:; rm -fr *.o preproc *.gcov *.gcda *.gcno *.plist *.man
+clean:; rm -fr *.man
 
 distclean: clean
 	rm -fr Makefile

src/man/preproc.awk

@@ -0,0 +1,64 @@
+#!/usr/bin/gawk -E
+
+# Copyright (c) 2019,2020 rusty-snake
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+function errexit(msg) {
+	print msg > "/dev/stderr"
+	exit 1
+}
+
+BEGIN {
+	macros[0] = 0
+	for (arg in ARGV) {
+		if (ARGV[arg] ~ /^-D[A-Z_]+$/) {
+			macros[length(macros) + 1] = substr(ARGV[arg], 3)
+		} else {
+			if (ARGV[arg] == "gawk" || ARGV[arg] == "awk")
+				continue
+#			errexit("Invalid commandline argument" ARGV[arg])
+		}
+		ARGV[arg] = ""
+	}
+
+	include = 1
+}
+/^#ifdef [A-Z_]+$/ {
+	macro = substr($0, 8)
+	for (i in macros) {
+		if (macros[i] == macro) {
+			include = 1
+			next
+		}
+	}
+	include = 0
+}
+/^#if 0$/ {
+	include = 0
+	next
+}
+/^#endif$/ {
+	include = 1
+	next
+}
+{
+	if (include)
+		print
+}