Add compilation directives for hmac in Watcom,riscos and vc6 platform-specific makefiles.

lib/Makefile.Watcom

@@ -52,7 +52,7 @@ CSOURCES = file.c timeval.c base64.c hostip.c progress.c formdata.c	&
   strdup.c socks.c ssh.c nss.c qssl.c rawstr.c curl_addrinfo.c          &
   socks_gssapi.c socks_sspi.c curl_sspi.c slist.c nonblock.c		&
   curl_memrchr.c imap.c pop3.c smtp.c pingpong.c rtsp.c curl_threads.c	&
-  warnless.c
+  warnless.c hmac.c
 
 OBJS = $(CSOURCES:.c=.obj)
 OBJS = $OBJ_DIR\$(OBJS: = $OBJ_DIR\)

lib/Makefile.riscos

@@ -15,7 +15,7 @@ objs =	o.base64 o.connect o.cookie o.dict \
 	o.transfer o.url o.version o.strtoofft o.sslgen o.gtls \
 	o.rawstr o.curl_addrinfo o.slist o.nonblock o.curl_rand \
 	o.curl_memrchr o.imap o.pop3 o.smtp o.pingpong o.rtsp \
-	o.curl_threads o.warnless
+	o.curl_threads o.warnless o.hmac
 
 
 # Compile options:
@@ -194,3 +194,6 @@ o.version:	c.version
 
 o.warnless:	c.warnless
 		gcc $(compileropts) -c -o warnless.o c.warnless
+
+o.hmac:	c.hmac
+		gcc $(compileropts) -c -o hmac.o c.hmac

lib/Makefile.vc6

@@ -517,6 +517,7 @@ X_OBJS= \
 	$(DIROBJ)\url.obj \
 	$(DIROBJ)\version.obj \
 	$(DIROBJ)\warnless.obj \
+	$(DIROBJ)\hmac.obj \
 	$(RESOURCE)
 
 all : $(TARGET)