Add pkg-config file, scdoc -v

Makefile

@@ -6,6 +6,7 @@ PREFIX?=/usr/local
 _INSTDIR=$(DESTDIR)$(PREFIX)
 BINDIR?=$(_INSTDIR)/bin
 MANDIR?=$(_INSTDIR)/share/man
+PCDIR?=$(_INSTDIR)/lib/pkgconfig
 OUTDIR=.build
 HOST_SCDOC=./scdoc
 .DEFAULT_GOAL=all
@@ -43,6 +44,7 @@ install: all
 	install -Dm755 scdoc $(BINDIR)/scdoc
 	install -Dm644 scdoc.1 $(MANDIR)/man1/scdoc.1
 	install -Dm644 scdoc.5 $(MANDIR)/man5/scdoc.5
+	install -Dm644 scdoc.pc $(PCDIR)/scdoc.pc
 
 check: scdoc scdoc.1 scdoc.5
 	@find test -perm -111 -exec '{}' \;

scdoc.pc

@@ -0,0 +1,7 @@
+prefix=/usr
+exec_prefix=${prefix}
+scdoc=${exec_prefix}/bin/scdoc
+
+Name: scdoc
+Description: Man page generator
+Version: 1.8.1

src/main.c

@@ -6,9 +6,10 @@
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <time.h>
 #include <unistd.h>
-#include "string.h"
+#include "str.h"
 #include "unicode.h"
 #include "util.h"
 
@@ -686,7 +687,10 @@ static void output_scdoc_preamble(struct parser *p) {
 }
 
 int main(int argc, char **argv) {
-	if (argc > 1) {
+	if (argc == 2 && strcmp(argv[1], "-v") == 0) {
+		printf("scdoc " VERSION "\n");
+		return 0;
+	} else if (argc > 1) {
 		fprintf(stderr, "Usage: scdoc < input.scd > output.roff\n");
 		return 1;
 	}

src/string.c

@@ -1,6 +1,6 @@
 #include <stdlib.h>
 #include <stdint.h>
-#include "string.h"
+#include "str.h"
 #include "unicode.h"
 
 static int ensure_capacity(str_t *str, size_t len) {