Create dependencies using an awk script. Works much nicer in vpath

environments.

build/mkdep.awk

@@ -0,0 +1,49 @@
+{
+	top_srcdir=$1
+	top_builddir=$2
+	srcdir=$3
+	cmd=$4
+
+	for (i = 5; i <= NF; i++) {
+		if (match($i, "^-[A-Z]") == 0)
+			break;
+		cmd=cmd " " $i
+	}
+
+	dif=i-1
+		
+	for (; i <= NF; i++)
+		filenames[i-dif]=$i
+	
+	no_files=NF-dif
+	
+	for(i = 1; i <= no_files; i++) {
+		if (system("test -r " filenames[i]) != 0)
+			continue
+		
+		target=filenames[i]
+		sub(srcdir "/", "", target)
+		target2=target
+		sub("\.(c|cpp)$", ".lo", target);
+		sub("\.(c|cpp)$", ".slo", target2);
+		deplist=""
+
+		for (e in used)
+			delete used[e]
+		
+		cmdx=cmd " " filenames[i]
+		while ((cmdx | getline) > 0) {
+			sub(top_srcdir, "$(top_srcdir)", $0)
+			sub(top_builddir, "$(top_builddir)", $0)
+			if (match($0, "^# [0-9]* \".*\.h\"") != 0  \
+					&& match($3, "^\"/") == 0          \
+					&& !($3 in used)) {
+				deplist=deplist " \\\n\t" substr($3,2,length($3)-2)
+				used[$3] = 1;
+			}
+		}
+
+		if (deplist != "")
+			print target " " target2 ":" deplist "\n";
+	}
+} 

build/rules.mk

@@ -41,7 +41,7 @@ install-p: $(targets) $(install_targets)
 distclean-p depend-p clean-p:
 
 depend: depend-recursive
-	test "`echo *.c`" = '*.c' || perl $(top_srcdir)/build/mkdep.perl $(CPP)  $(INCLUDES) $(EXTRA_INCLUDES) *.c > $(builddir)/.deps
+	@echo $(top_srcdir) $(top_builddir) $(srcdir) $(CPP) $(INCLUDES) $(EXTRA_INCLUDES) $(DEFS) $(CPPFLAGS) $(srcdir)/*.c *.c | awk -f $(top_srcdir)/build/mkdep.awk > $(builddir)/.deps || true
 
 clean: clean-recursive clean-x