From 65f76edb8f568553a5b4386b0c4917803d47e97d Mon Sep 17 00:00:00 2001
From: David van Moolenbroek <david@minix3.org>
Date: Tue, 30 Sep 2014 21:04:09 +0000
Subject: [PATCH] minix libraries: resolve clang warnings

Change-Id: I0f3425fb8838708c9848a006f1eee5ab1bad71d2
---
 minix/include/minix/audio_fw.h       |  4 ++++
 minix/include/minix/blockdriver_mt.h |  2 +-
 minix/include/minix/clkconf.h        |  4 ++--
 minix/lib/libaudiodriver/Makefile    |  3 ++-
 minix/lib/libaudiodriver/audio_fw.c  | 15 +++------------
 minix/lib/libbdev/Makefile           |  8 ++++----
 minix/lib/libbdev/minor.c            |  2 +-
 minix/lib/libblockdriver/Makefile    |  8 ++++----
 minix/lib/libblockdriver/driver.c    | 10 +++++-----
 minix/lib/libblockdriver/driver_mt.c |  9 +++++----
 minix/lib/libblockdriver/trace.c     |  6 +++---
 minix/lib/libblockdriver/trace.h     |  2 +-
 minix/lib/libchardriver/Makefile     |  8 ++++----
 minix/lib/libchardriver/chardriver.c |  4 ++--
 minix/lib/libclkconf/Makefile        |  4 ++--
 minix/lib/libdevman/Makefile         |  3 ++-
 minix/lib/libdevman/generic.c        | 10 +---------
 minix/lib/libdevman/usb.c            |  2 +-
 minix/lib/libexec/exec_elf.c         |  4 ++--
 minix/lib/libexec/libexec.h          |  5 +++--
 minix/lib/libfetch/common.h          |  3 ++-
 minix/lib/libfetch/ftp.c             |  3 +++
 minix/lib/libfetch/http.c            |  3 +++
 minix/lib/libi2cdriver/Makefile      |  5 ++---
 minix/lib/libi2cdriver/i2cdriver.c   |  7 ++++---
 minix/lib/liblwip/Makefile           |  1 -
 minix/lib/liblwip/core/netif.c       |  3 ++-
 minix/lib/liblwip/sys_arch.c         |  2 ++
 minix/lib/libminixfs/Makefile        |  9 +++++----
 minix/lib/libminixfs/cache.c         | 10 +++++-----
 minix/lib/libnetdriver/Makefile      |  8 ++++----
 minix/lib/libnetdriver/netdriver.c   |  2 +-
 minix/lib/libnetsock/Makefile        |  2 +-
 minix/lib/libnetsock/socket.c        |  4 ++--
 minix/lib/libusb/Makefile            |  7 ++++---
 minix/lib/libusb/usb.c               |  9 +++++----
 minix/lib/libvassert/Makefile        |  5 ++---
 minix/lib/libvassert/vassert.c       |  6 +++---
 minix/lib/libvassert/vassert.h       |  3 ++-
 minix/lib/libvirtio/Makefile         |  8 ++++----
 minix/lib/libvirtio/virtio.c         |  2 +-
 minix/lib/libvirtio/virtio_ring.h    |  2 +-
 minix/lib/libvtreefs/Makefile        |  2 --
 43 files changed, 110 insertions(+), 109 deletions(-)

diff --git a/minix/include/minix/audio_fw.h b/minix/include/minix/audio_fw.h
index 324dbfe81..53c3ee57d 100644
--- a/minix/include/minix/audio_fw.h
+++ b/minix/include/minix/audio_fw.h
@@ -84,4 +84,8 @@ EXTERN special_file_t special_file[];
 #define READ_DMA 1
 #define WRITE_DMA 2
 
+EXTERN int sef_cb_lu_prepare(int state);
+EXTERN int sef_cb_lu_state_isvalid(int state);
+EXTERN void sef_cb_lu_state_dump(int state);
+
 #endif /* AUDIO_FW_H */
diff --git a/minix/include/minix/blockdriver_mt.h b/minix/include/minix/blockdriver_mt.h
index 2b96c505d..3c74515df 100644
--- a/minix/include/minix/blockdriver_mt.h
+++ b/minix/include/minix/blockdriver_mt.h
@@ -10,7 +10,7 @@ void blockdriver_mt_task(struct blockdriver *driver_tab);
 void blockdriver_mt_sleep(void);
 void blockdriver_mt_wakeup(thread_id_t id);
 void blockdriver_mt_terminate(void);
-void blockdriver_mt_set_workers(device_id_t id, int workers);
+void blockdriver_mt_set_workers(device_id_t id, unsigned int workers);
 thread_id_t blockdriver_mt_get_tid(void);
 
 #endif /* _MINIX_BLOCKDRIVER_MT_H */
diff --git a/minix/include/minix/clkconf.h b/minix/include/minix/clkconf.h
index dc66f4aac..51645221c 100644
--- a/minix/include/minix/clkconf.h
+++ b/minix/include/minix/clkconf.h
@@ -11,8 +11,8 @@
 #define CM_PER_I2C1_CLKCTRL 0x048
 #define CM_WKUP_I2C0_CLKCTRL 0x4B8
 
-int clkconf_init();
+int clkconf_init(void);
 int clkconf_set(u32_t clk, u32_t mask, u32_t value);
-int clkconf_release();
+int clkconf_release(void);
 
 #endif
diff --git a/minix/lib/libaudiodriver/Makefile b/minix/lib/libaudiodriver/Makefile
index c4d84ab0d..545fb7692 100644
--- a/minix/lib/libaudiodriver/Makefile
+++ b/minix/lib/libaudiodriver/Makefile
@@ -1,6 +1,7 @@
 # Makefile for the common audio framework
+
 NOGCCERROR=yes
-NOCLANGERROR=yes
+
 CPPFLAGS+= -D_MINIX_SYSTEM
 
 LIB=    audiodriver
diff --git a/minix/lib/libaudiodriver/audio_fw.c b/minix/lib/libaudiodriver/audio_fw.c
index ab45e5bb0..39410c985 100644
--- a/minix/lib/libaudiodriver/audio_fw.c
+++ b/minix/lib/libaudiodriver/audio_fw.c
@@ -58,9 +58,6 @@ static int irq_hook_set = FALSE;
 static void sef_local_startup(void);
 static int sef_cb_init_fresh(int type, sef_init_info_t *info);
 static void sef_cb_signal_handler(int signo);
-EXTERN int sef_cb_lu_prepare(int state);
-EXTERN int sef_cb_lu_state_isvalid(int state);
-EXTERN void sef_cb_lu_state_dump(int state);
 
 static struct chardriver audio_tab = {
 	.cdr_open	= msg_open,	/* open the special file */
@@ -73,9 +70,6 @@ static struct chardriver audio_tab = {
 
 int main(void)
 {
-	int r, caller;
-	message mess, repl_mess;
-	int ipc_status;
 
 	/* SEF local startup. */
 	sef_local_startup();
@@ -115,7 +109,7 @@ static void sef_local_startup(void)
 static int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
 {
 /* Initialize the audio driver framework. */
-	u32_t i; char irq;
+	int i; char irq;
 	static int executed = 0;
 	sub_dev_t* sub_dev_ptr;
 
@@ -499,7 +493,7 @@ static ssize_t msg_read(devminor_t minor, u64_t UNUSED(position),
 
 static void msg_hardware(unsigned int UNUSED(mask))
 {
-	u32_t     i;
+	int i;
 
 	/* loop over all sub devices */
 	for ( i = 0; i < drv.NrOfSubDevices; i++) {
@@ -579,7 +573,6 @@ static void handle_int_write(int sub_dev_nr)
 static void handle_int_read(int sub_dev_nr) 
 {
 	sub_dev_t *sub_dev_ptr;
-	message m;
 
 	sub_dev_ptr = &sub_dev[sub_dev_nr];
 
@@ -651,7 +644,6 @@ static int get_started(sub_dev_t *sub_dev_ptr) {
 static void data_from_user(sub_dev_t *subdev)
 {
 	int r;
-	message m;
 
 	if (subdev->DmaLength == subdev->NrOfDmaFragments &&
 			subdev->BufLength == subdev->NrOfExtraBuffers) return;/* no space */
@@ -710,7 +702,6 @@ static void data_from_user(sub_dev_t *subdev)
 static void data_to_user(sub_dev_t *sub_dev_ptr)
 {
 	int r;
-	message m;
 
 	if (!sub_dev_ptr->RevivePending) return; /* nobody is wating for data */
 	if (sub_dev_ptr->BufLength == 0 && sub_dev_ptr->DmaLength == 0) return; 
@@ -793,7 +784,7 @@ static int init_buffers(sub_dev_t *sub_dev_ptr)
 	}
 
 	if ((left = dma_bytes_left(sub_dev_ptr->DmaPhys)) < 
-			sub_dev_ptr->DmaSize) {
+			(unsigned int)sub_dev_ptr->DmaSize) {
 		/* First half of buffer crosses a 64K boundary,
 		 * can't DMA into that */
 		sub_dev_ptr->DmaPtr += left;
diff --git a/minix/lib/libbdev/Makefile b/minix/lib/libbdev/Makefile
index bf0e1c01c..f91e5cae7 100644
--- a/minix/lib/libbdev/Makefile
+++ b/minix/lib/libbdev/Makefile
@@ -1,10 +1,10 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-CPPFLAGS+= -D_MINIX_SYSTEM
-
 # Makefile for libbdev
 .include <bsd.own.mk>
 
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB=	bdev
 
 SRCS=	bdev.c driver.c call.c ipc.c minor.c
diff --git a/minix/lib/libbdev/minor.c b/minix/lib/libbdev/minor.c
index ca827a7a8..ad4f96c43 100644
--- a/minix/lib/libbdev/minor.c
+++ b/minix/lib/libbdev/minor.c
@@ -59,7 +59,7 @@ int bdev_minor_reopen(dev_t dev)
 		}
 
 		if (m.m_lblockdriver_lbdev_reply.id != NO_ID) {
-			printf("bdev: driver (%d) sent invalid ID (%ld)\n",
+			printf("bdev: driver (%d) sent invalid ID (%d)\n",
 				endpt, m.m_lblockdriver_lbdev_reply.id);
 			return EINVAL;
 		}
diff --git a/minix/lib/libblockdriver/Makefile b/minix/lib/libblockdriver/Makefile
index e61dc69bc..42b999280 100644
--- a/minix/lib/libblockdriver/Makefile
+++ b/minix/lib/libblockdriver/Makefile
@@ -1,10 +1,10 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-CPPFLAGS+= -D_MINIX_SYSTEM
-
 # Makefile for libblockdriver
 .include <bsd.own.mk>
 
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB=	blockdriver
 
 SRCS=	driver.c drvlib.c driver_st.c driver_mt.c mq.c trace.c
diff --git a/minix/lib/libblockdriver/driver.c b/minix/lib/libblockdriver/driver.c
index a67c76669..0c16b9aeb 100644
--- a/minix/lib/libblockdriver/driver.c
+++ b/minix/lib/libblockdriver/driver.c
@@ -98,7 +98,7 @@ void blockdriver_announce(int type)
   int r;
   char key[DS_MAX_KEYLEN];
   char label[DS_MAX_KEYLEN];
-  char *driver_prefix = "drv.blk.";
+  const char *driver_prefix = "drv.blk.";
 
   /* Callers are allowed to use ipc_sendrec to communicate with drivers.
    * For this reason, there may blocked callers when a driver restarts.
@@ -223,9 +223,9 @@ static int do_vrdwt(struct blockdriver *bdp, message *mp, thread_id_t id)
 {
 /* Carry out an device read or write to/from a vector of buffers. */
   iovec_t iovec[NR_IOREQS];
-  unsigned int nr_req;
+  unsigned int i, nr_req;
   u64_t position;
-  int i, do_write;
+  int do_write;
   ssize_t r, size;
 
   /* Copy the vector from the caller to kernel space. */
@@ -260,7 +260,7 @@ static int do_vrdwt(struct blockdriver *bdp, message *mp, thread_id_t id)
 /*===========================================================================*
  *				do_dioctl				     *
  *===========================================================================*/
-static int do_dioctl(struct blockdriver *bdp, dev_t minor,
+static int do_dioctl(struct blockdriver *bdp, devminor_t minor,
   unsigned long request, endpoint_t endpt, cp_grant_id_t grant)
 {
 /* Carry out a disk-specific I/O control request. */
@@ -316,7 +316,7 @@ static int do_ioctl(struct blockdriver *bdp, message *mp)
  * to the tracing module, and handle setting/getting partitions when the driver
  * has specified that it is a disk driver.
  */
-  dev_t minor;
+  devminor_t minor;
   unsigned long request;
   cp_grant_id_t grant;
   endpoint_t user_endpt;
diff --git a/minix/lib/libblockdriver/driver_mt.c b/minix/lib/libblockdriver/driver_mt.c
index 66d694854..8d82876b1 100644
--- a/minix/lib/libblockdriver/driver_mt.c
+++ b/minix/lib/libblockdriver/driver_mt.c
@@ -26,7 +26,7 @@
 #define TID_DEVICE(tid)		((tid) / MAX_WORKERS)
 #define TID_WORKER(tid)		((tid) % MAX_WORKERS)
 
-typedef int worker_id_t;
+typedef unsigned int worker_id_t;
 
 typedef enum {
   STATE_DEAD,
@@ -150,7 +150,7 @@ static void *worker_thread(void *param)
   device_t *dp;
   thread_id_t tid;
   message m;
-  int ipc_status, r;
+  int ipc_status;
 
   wp = (worker_t *) param;
   assert(wp != NULL);
@@ -284,7 +284,8 @@ static void master_handle_message(message *m_ptr, int ipc_status)
   device_id_t id;
   worker_t *wp;
   device_t *dp;
-  int r, wid;
+  unsigned int wid;
+  int r;
 
   /* If this is not a block driver request, we cannot get the minor device
    * associated with it, and thus we can not tell which thread should process
@@ -488,7 +489,7 @@ void blockdriver_mt_wakeup(thread_id_t id)
 /*===========================================================================*
  *				blockdriver_mt_set_workers		     *
  *===========================================================================*/
-void blockdriver_mt_set_workers(device_id_t id, int workers)
+void blockdriver_mt_set_workers(device_id_t id, unsigned int workers)
 {
 /* Set the number of worker threads for the given device.
  */
diff --git a/minix/lib/libblockdriver/trace.c b/minix/lib/libblockdriver/trace.c
index 63c2cec31..f1a048b19 100644
--- a/minix/lib/libblockdriver/trace.c
+++ b/minix/lib/libblockdriver/trace.c
@@ -10,11 +10,11 @@
 #include "const.h"
 #include "trace.h"
 
-#define NO_TRACEDEV		((dev_t) -1)
+#define NO_TRACEDEV		((devminor_t) -1)
 #define NO_TIME			((u32_t) -1)
 
 static int trace_enabled	= FALSE;
-static dev_t trace_dev		= NO_TRACEDEV;
+static devminor_t trace_dev	= NO_TRACEDEV;
 static btrace_entry *trace_buf	= NULL;
 static size_t trace_size	= 0;
 static size_t trace_pos;
@@ -48,7 +48,7 @@ static u32_t trace_gettime(void)
 /*===========================================================================*
  *				trace_ctl				     *
  *===========================================================================*/
-int trace_ctl(dev_t minor, unsigned long request, endpoint_t endpt,
+int trace_ctl(devminor_t minor, unsigned long request, endpoint_t endpt,
 	cp_grant_id_t grant)
 {
 /* Process a block trace control request.
diff --git a/minix/lib/libblockdriver/trace.h b/minix/lib/libblockdriver/trace.h
index bb15289d9..d3e175f90 100644
--- a/minix/lib/libblockdriver/trace.h
+++ b/minix/lib/libblockdriver/trace.h
@@ -1,7 +1,7 @@
 #ifndef _BLOCKDRIVER_TRACE_H
 #define _BLOCKDRIVER_TRACE_H
 
-int trace_ctl(dev_t minor, unsigned long request, endpoint_t endpt,
+int trace_ctl(devminor_t minor, unsigned long request, endpoint_t endpt,
 	cp_grant_id_t grant);
 
 void trace_start(thread_id_t thread_id, message *m_ptr);
diff --git a/minix/lib/libchardriver/Makefile b/minix/lib/libchardriver/Makefile
index b6997d01f..5c3a87a4f 100644
--- a/minix/lib/libchardriver/Makefile
+++ b/minix/lib/libchardriver/Makefile
@@ -1,10 +1,10 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-CPPFLAGS+= -D_MINIX_SYSTEM
-
 # Makefile for libchardriver
 .include <bsd.own.mk>
 
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB=	chardriver
 
 SRCS=	chardriver.c
diff --git a/minix/lib/libchardriver/chardriver.c b/minix/lib/libchardriver/chardriver.c
index 407df37d2..7a5a3603c 100644
--- a/minix/lib/libchardriver/chardriver.c
+++ b/minix/lib/libchardriver/chardriver.c
@@ -102,7 +102,7 @@ void chardriver_announce(void)
   int r;
   char key[DS_MAX_KEYLEN];
   char label[DS_MAX_KEYLEN];
-  char *driver_prefix = "drv.chr.";
+  const char *driver_prefix = "drv.chr.";
 
   /* Callers are allowed to use ipc_sendrec to communicate with drivers.
    * For this reason, there may blocked callers when a driver restarts.
@@ -456,7 +456,7 @@ void chardriver_process(struct chardriver *cdp, message *m_ptr, int ipc_status)
 /* Call the appropiate driver function, based on the type of request. Send a
  * reply to the caller if necessary.
  */
-  int r, reply;
+  int r;
 
   /* Check for notifications first. We never reply to notifications. */
   if (is_ipc_notify(ipc_status)) {
diff --git a/minix/lib/libclkconf/Makefile b/minix/lib/libclkconf/Makefile
index 49cb3c659..f9aa883d3 100644
--- a/minix/lib/libclkconf/Makefile
+++ b/minix/lib/libclkconf/Makefile
@@ -1,8 +1,8 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
 #
 # Makefile for libclkconf
 
+NOGCCERROR=yes
+
 CPPFLAGS+= -D_SYSTEM -D_MINIX_SYSTEM
 
 LIB=	clkconf
diff --git a/minix/lib/libdevman/Makefile b/minix/lib/libdevman/Makefile
index e2ec55bed..b4ff41d38 100644
--- a/minix/lib/libdevman/Makefile
+++ b/minix/lib/libdevman/Makefile
@@ -1,5 +1,6 @@
 NOGCCERROR=yes
-NOCLANGERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
 
 LIB = devman
 
diff --git a/minix/lib/libdevman/generic.c b/minix/lib/libdevman/generic.c
index 9e404e814..e900ca139 100644
--- a/minix/lib/libdevman/generic.c
+++ b/minix/lib/libdevman/generic.c
@@ -33,7 +33,7 @@ static int save_string(char *buffer, char *src, size_t *offset)
 /****************************************************************************
  *     serialize_dev                                                        *
  ***************************************************************************/
-void *serialize_dev(struct devman_dev *dev, size_t *overall_size)
+static void *serialize_dev(struct devman_dev *dev, size_t *overall_size)
 {
 	/* determine size of serialized version of dev */
 	char *buffer;
@@ -179,14 +179,6 @@ int devman_del_device(struct devman_dev *dev)
 
 }
 
-/****************************************************************************
- *     devman_get_ep                                                        *
- ***************************************************************************/
-endpoint_t devman_get_ep(void)
-{
-	return devman_ep;
-}
-
 /****************************************************************************
  *     devman_init                                                          *
  ***************************************************************************/
diff --git a/minix/lib/libdevman/usb.c b/minix/lib/libdevman/usb.c
index 65d0ff347..9b984d36c 100644
--- a/minix/lib/libdevman/usb.c
+++ b/minix/lib/libdevman/usb.c
@@ -23,7 +23,7 @@ static int (*unbind_cb) (struct devman_usb_bind_cb_data *data, endpoint_t ep);
  ***************************************************************************/
 static void 
 devman_usb_add_attr
-(struct devman_dev *dev, char *name, char *data)
+(struct devman_dev *dev, const char *name, const char *data)
 {
 	struct devman_static_attribute *attr = (struct devman_static_attribute *)
 	    malloc(sizeof(struct devman_static_attribute));
diff --git a/minix/lib/libexec/exec_elf.c b/minix/lib/libexec/exec_elf.c
index fca784aeb..17dcf627a 100644
--- a/minix/lib/libexec/exec_elf.c
+++ b/minix/lib/libexec/exec_elf.c
@@ -56,7 +56,7 @@ static int elf_ph_sane(Elf_Phdr *phdr)
 }
 
 static int elf_unpack(char *exec_hdr,
-	int hdr_len, Elf_Ehdr **hdr, Elf_Phdr **phdr)
+	size_t hdr_len, Elf_Ehdr **hdr, Elf_Phdr **phdr)
 {
   if(hdr_len < sizeof(Elf_Ehdr))
 	return ENOEXEC;
@@ -98,7 +98,7 @@ static int check_header(Elf_Ehdr *hdr)
  * Return <0 on error.
  */
 int elf_has_interpreter(char *exec_hdr,		/* executable header */
-		int hdr_len, char *interp, int maxsz)
+		size_t hdr_len, char *interp, size_t maxsz)
 {
   Elf_Ehdr *hdr = NULL;
   Elf_Phdr *phdr = NULL;
diff --git a/minix/lib/libexec/libexec.h b/minix/lib/libexec/libexec.h
index f7e218fd1..eac0a8e8b 100644
--- a/minix/lib/libexec/libexec.h
+++ b/minix/lib/libexec/libexec.h
@@ -52,8 +52,9 @@ struct exec_info {
     vir_bytes stack_high;		/* High stack addr */
 };
 
-int elf_has_interpreter(char *exec_hdr, int hdr_len, char *interp, int maxsz);
-int elf_phdr(char *exec_hdr, int hdr_len, vir_bytes *phdr);
+int elf_has_interpreter(char *exec_hdr, size_t hdr_len, char *interp,
+	size_t maxsz);
+int elf_phdr(char *exec_hdr, size_t hdr_len, vir_bytes *phdr);
 
 int libexec_pm_newexec(endpoint_t proc_e, struct exec_info *execi);
 
diff --git a/minix/lib/libfetch/common.h b/minix/lib/libfetch/common.h
index 3949253c7..42f2f80c5 100644
--- a/minix/lib/libfetch/common.h
+++ b/minix/lib/libfetch/common.h
@@ -92,7 +92,8 @@ struct fetcherr {
 
 void		 fetch_seterr(struct fetcherr *, int);
 void		 fetch_syserr(void);
-void		 fetch_info(const char *, ...);
+void		 fetch_info(const char *, ...)
+			__attribute__((__format__(__printf__, 1, 2)));
 int		 fetch_default_port(const char *);
 int		 fetch_default_proxy_port(const char *);
 int		 fetch_bind(int, int, const char *);
diff --git a/minix/lib/libfetch/ftp.c b/minix/lib/libfetch/ftp.c
index d3903b4fa..8fd4e0010 100644
--- a/minix/lib/libfetch/ftp.c
+++ b/minix/lib/libfetch/ftp.c
@@ -199,6 +199,9 @@ ftp_chkerr(conn_t *conn)
 /*
  * Send a command and check reply
  */
+static int ftp_cmd(conn_t *conn, const char *fmt, ...)
+	__attribute__((__format__(__printf__, 2, 3)));
+
 #ifndef __minix
 static int
 ftp_cmd(conn_t *conn, const char *fmt, ...)
diff --git a/minix/lib/libfetch/http.c b/minix/lib/libfetch/http.c
index 5ff7da749..a374d2405 100644
--- a/minix/lib/libfetch/http.c
+++ b/minix/lib/libfetch/http.c
@@ -406,6 +406,9 @@ static struct {
 /*
  * Send a formatted line; optionally echo to terminal
  */
+static int http_cmd(conn_t *conn, const char *fmt, ...)
+	__attribute__((__format__(__printf__, 2, 3)));
+
 #ifndef __minix
 static int
 http_cmd(conn_t *conn, const char *fmt, ...)
diff --git a/minix/lib/libi2cdriver/Makefile b/minix/lib/libi2cdriver/Makefile
index 066ecc8ab..0fb67e17a 100644
--- a/minix/lib/libi2cdriver/Makefile
+++ b/minix/lib/libi2cdriver/Makefile
@@ -1,10 +1,9 @@
+# Makefile for libi2cdriver
+
 NOGCCERROR=yes
-NOCLANGERROR=yes
 
 CPPFLAGS+=-D_MINIX_SYSTEM
 
-# Makefile for libi2cdriver
-
 LIB=	i2cdriver
 
 SRCS=	i2cdriver.c
diff --git a/minix/lib/libi2cdriver/i2cdriver.c b/minix/lib/libi2cdriver/i2cdriver.c
index 3112ebd5f..df631b225 100644
--- a/minix/lib/libi2cdriver/i2cdriver.c
+++ b/minix/lib/libi2cdriver/i2cdriver.c
@@ -15,7 +15,7 @@ i2cdriver_announce(uint32_t bus)
 	int r;
 	char key[DS_MAX_KEYLEN];
 	char label[DS_MAX_KEYLEN];
-	char *driver_prefix = "drv.i2c.";
+	const char *driver_prefix = "drv.i2c.";
 
 	/* Callers are allowed to use ipc_sendrec to communicate with drivers.
 	 * For this reason, there may blocked callers when a driver restarts.
@@ -83,7 +83,7 @@ i2cdriver_bus_endpoint(uint32_t bus)
 {
 	/* locate the driver for the i2c bus itself */
 	int r;
-	char *label_prefix = "i2c.";
+	const char *label_prefix = "i2c.";
 	char label[DS_MAX_KEYLEN];
 	endpoint_t bus_endpoint;
 
@@ -197,7 +197,8 @@ static int
 __i2creg_read(endpoint_t bus_endpoint, i2c_addr_t address, uint8_t raw,
     uint8_t reg, uint32_t * val, size_t vallen)
 {
-	int r, i;
+	uint32_t i;
+	int r;
 	minix_i2c_ioctl_exec_t ioctl_exec;
 
 	assert(val != NULL);
diff --git a/minix/lib/liblwip/Makefile b/minix/lib/liblwip/Makefile
index ac20901fd..fd576e565 100644
--- a/minix/lib/liblwip/Makefile
+++ b/minix/lib/liblwip/Makefile
@@ -1,5 +1,4 @@
 NOGCCERROR=yes
-NOCLANGERROR=yes
 
 LIB = lwip
 
diff --git a/minix/lib/liblwip/core/netif.c b/minix/lib/liblwip/core/netif.c
index f8133f76f..f4c6d5ea5 100644
--- a/minix/lib/liblwip/core/netif.c
+++ b/minix/lib/liblwip/core/netif.c
@@ -716,7 +716,8 @@ netif_loop_output(struct netif *netif, struct pbuf *p,
      netif_poll(). */
 
   /* let last point to the last pbuf in chain r */
-  for (last = r; last->next != NULL; last = last->next);
+  for (last = r; last->next != NULL; last = last->next)
+	;
 
   SYS_ARCH_PROTECT(lev);
   if(netif->loop_first != NULL) {
diff --git a/minix/lib/liblwip/sys_arch.c b/minix/lib/liblwip/sys_arch.c
index 7d4fc49af..c197efc10 100644
--- a/minix/lib/liblwip/sys_arch.c
+++ b/minix/lib/liblwip/sys_arch.c
@@ -2,6 +2,8 @@
 #include <minix/sysutil.h>
 #include <errno.h>
 
+#include "lwip/sys.h"
+
 u32_t sys_jiffies(void)
 {
 	clock_t ticks;
diff --git a/minix/lib/libminixfs/Makefile b/minix/lib/libminixfs/Makefile
index 0426137c7..bd41e9ebf 100644
--- a/minix/lib/libminixfs/Makefile
+++ b/minix/lib/libminixfs/Makefile
@@ -1,9 +1,10 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-CPPFLAGS+= -D_MINIX_SYSTEM
-
 # Makefile for libminixfs
 .include <bsd.own.mk>
+
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB=		minixfs
 
 SRCS=  	cache.c bio.c
diff --git a/minix/lib/libminixfs/cache.c b/minix/lib/libminixfs/cache.c
index 8c410981a..697b360a9 100644
--- a/minix/lib/libminixfs/cache.c
+++ b/minix/lib/libminixfs/cache.c
@@ -39,7 +39,7 @@ static struct buf **buf_hash;   /* the buffer hash table */
 static unsigned int nr_bufs;
 static int may_use_vmcache;
 
-static int fs_block_size = PAGE_SIZE;	/* raw i/o block size */
+static size_t fs_block_size = PAGE_SIZE;	/* raw i/o block size */
 
 static int rdwt_err;
 
@@ -106,8 +106,8 @@ void lmfs_blockschange(dev_t dev, int delta)
         static int bitdelta = 0;
         bitdelta += delta;
 #define BANDKB (10*1024)	/* recheck cache every 10MB change */
-        if(bitdelta*fs_block_size/1024 > BANDKB ||
-	   bitdelta*fs_block_size/1024 < -BANDKB) {
+        if(bitdelta*(int)fs_block_size/1024 > BANDKB ||
+	   bitdelta*(int)fs_block_size/1024 < -BANDKB) {
                 lmfs_cache_reevaluate(dev);
                 bitdelta = 0;
         }
@@ -184,7 +184,7 @@ struct buf *lmfs_get_block(register dev_t dev, register block_t block,
 	return lmfs_get_block_ino(dev, block, only_search, VMC_NO_INODE, 0);
 }
 
-void munmap_t(void *a, int len)
+static void munmap_t(void *a, int len)
 {
 	vir_bytes av = (vir_bytes) a;
 	assert(a);
@@ -627,7 +627,7 @@ void lmfs_rw_scattered(
   static iovec_t iovec[NR_IOREQS];
   off_t pos;
   int iov_per_block;
-  int start_in_use = bufs_in_use, start_bufqsize = bufqsize;
+  unsigned int start_in_use = bufs_in_use, start_bufqsize = bufqsize;
 
   assert(bufqsize >= 0);
   if(bufqsize == 0) return;
diff --git a/minix/lib/libnetdriver/Makefile b/minix/lib/libnetdriver/Makefile
index 00b142b1f..2c670a4ca 100644
--- a/minix/lib/libnetdriver/Makefile
+++ b/minix/lib/libnetdriver/Makefile
@@ -1,9 +1,9 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-CPPFLAGS+= -D_MINIX_SYSTEM
-
 # Makefile for libnetdriver
 
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB=	netdriver
 
 SRCS=	netdriver.c
diff --git a/minix/lib/libnetdriver/netdriver.c b/minix/lib/libnetdriver/netdriver.c
index 2b6d0271b..51adcf2a5 100644
--- a/minix/lib/libnetdriver/netdriver.c
+++ b/minix/lib/libnetdriver/netdriver.c
@@ -25,7 +25,7 @@ void netdriver_announce()
   int r;
   char key[DS_MAX_KEYLEN];
   char label[DS_MAX_KEYLEN];
-  char *driver_prefix = "drv.net.";
+  const char *driver_prefix = "drv.net.";
 
   /* Publish a driver up event. */
   r = ds_retrieve_label_name(label, sef_self());
diff --git a/minix/lib/libnetsock/Makefile b/minix/lib/libnetsock/Makefile
index e55e699ad..bdf907649 100644
--- a/minix/lib/libnetsock/Makefile
+++ b/minix/lib/libnetsock/Makefile
@@ -1,5 +1,5 @@
 NOGCCERROR=yes
-NOCLANGERROR=yes
+
 CPPFLAGS+= -D_MINIX_SYSTEM
 
 LIB = netsock
diff --git a/minix/lib/libnetsock/socket.c b/minix/lib/libnetsock/socket.c
index bef626ec7..eafaadac0 100644
--- a/minix/lib/libnetsock/socket.c
+++ b/minix/lib/libnetsock/socket.c
@@ -80,7 +80,7 @@ struct mq {
 
 static struct mq * mq_head, *mq_tail;
 
-int mq_enqueue(struct sock_req * req)
+static int mq_enqueue(struct sock_req * req)
 {
 	struct mq * mq;
 
@@ -317,7 +317,7 @@ static int netsock_close(devminor_t minor)
 
 static int netsock_request(struct socket *sock, struct sock_req *req)
 {
-	char *o;
+	const char *o;
 
 	/*
 	 * If an operation is pending (blocking operation) or writing is
diff --git a/minix/lib/libusb/Makefile b/minix/lib/libusb/Makefile
index dc5a3c17c..9bc0782d8 100644
--- a/minix/lib/libusb/Makefile
+++ b/minix/lib/libusb/Makefile
@@ -1,8 +1,9 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-
 # Makefile for libdriver
 
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB = usb	
 
 SRCS = usb.c
diff --git a/minix/lib/libusb/usb.c b/minix/lib/libusb/usb.c
index 772c58702..c7ec9b794 100644
--- a/minix/lib/libusb/usb.c
+++ b/minix/lib/libusb/usb.c
@@ -12,7 +12,7 @@
 static struct usb_urb * pending_urbs = NULL;
 static endpoint_t hcd_ep;
 
-static void _usb_urb_complete(struct usb_driver *ud, long urb_id);
+static void _usb_urb_complete(struct usb_driver *ud, unsigned int urb_id);
 
 /*****************************************************************************
  *         usb_send_urb                                                      *
@@ -154,7 +154,7 @@ int usb_init(char *name)
 /*****************************************************************************
  *      _usb_urb_complete                                                    *
  ****************************************************************************/
-static void _usb_urb_complete(struct usb_driver *ud, long urb_id)
+static void _usb_urb_complete(struct usb_driver *ud, unsigned int urb_id)
 {
 	/* find the corresponding URB in the urb_pending list. */
 	struct usb_urb * urb = NULL;
@@ -186,7 +186,8 @@ static void _usb_urb_complete(struct usb_driver *ud, long urb_id)
 #endif
 		ud->urb_completion(urb);
 	} else {
-		printf("WARN: _usb_urb_complete: did not find URB with ID %ld", urb_id);
+		printf("WARN: _usb_urb_complete: did not find URB with ID %u",
+		    urb_id);
 	}
 }
 
@@ -210,7 +211,7 @@ int usb_handle_msg(struct usb_driver *ud, message *msg)
 
 	switch(msg->m_type) {
 		case USB_COMPLETE_URB:
-			_usb_urb_complete(ud, msg->USB_URB_ID);
+			_usb_urb_complete(ud, (unsigned int)msg->USB_URB_ID);
 			return 0;
 		case USB_ANNOUCE_DEV:
 			ud->connect_device(msg->USB_DEV_ID, msg->USB_INTERFACES);
diff --git a/minix/lib/libvassert/Makefile b/minix/lib/libvassert/Makefile
index 1f131df39..daf03bccd 100644
--- a/minix/lib/libvassert/Makefile
+++ b/minix/lib/libvassert/Makefile
@@ -1,8 +1,7 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-
 # Makefile for libvassert library
 
+NOGCCERROR=yes
+
 MKPIC?=	no
 LIB=    vassert
 SRCS=	backdoor.S vassert.c
diff --git a/minix/lib/libvassert/vassert.c b/minix/lib/libvassert/vassert.c
index d3d05a8b6..f0dde57ad 100644
--- a/minix/lib/libvassert/vassert.c
+++ b/minix/lib/libvassert/vassert.c
@@ -61,7 +61,7 @@ void libvassert_process_backdoor(uint32, uint32, uint32, reg_t *, reg_t *,
  *---------------------------------------------------------------------
  */
 
-static void sig_segv(int sig_no)
+static void __dead sig_segv(int sig_no)
 {
    /* jumping to error handling in VAssert_IsInVM. */
    siglongjmp(segv_jmp, 1);
@@ -144,7 +144,7 @@ char VAssert_Init(void)
    libvassert_process_backdoor(CMD_SET_ADDRESS, page_address,
    	MAGIC_PORT|(1<<16), &eax, &ebx, &ecx, &edx);
 
-   return (eax != -1) ? 0 : -1;
+   return (eax != (uint32)-1) ? 0 : -1;
 }
 
 
@@ -172,7 +172,7 @@ char VAssert_Uninit(void)
       return -1;
    }
    libvassert_process_backdoor(CMD_SET_ADDRESS, 0, MAGIC_PORT|(0<<16), &eax, &ebx, &ecx, &edx);
-   return (eax != -1) ? 0 : 1;
+   return (eax != (unsigned int)-1) ? 0 : 1;
 }
 
 
diff --git a/minix/lib/libvassert/vassert.h b/minix/lib/libvassert/vassert.h
index a18c56443..0eca9533d 100644
--- a/minix/lib/libvassert/vassert.h
+++ b/minix/lib/libvassert/vassert.h
@@ -72,7 +72,8 @@ extern char VAssert_Uninit(void);
 /*
  * These functions should not be called directly; they need to be wrapped.
  */
-extern void VAssert_LogMain(const char *format, ...);
+extern void VAssert_LogMain(const char *format, ...)
+	__attribute__((__format__(__printf__, 1, 2)));
 extern void VAssert_GoLiveMain(void);
 extern void VAssert_ReturnToReplayMain(void);
 extern char VAssert_Trace(size_t max_size);
diff --git a/minix/lib/libvirtio/Makefile b/minix/lib/libvirtio/Makefile
index 1df3297dc..5a63e9173 100644
--- a/minix/lib/libvirtio/Makefile
+++ b/minix/lib/libvirtio/Makefile
@@ -1,10 +1,10 @@
-NOGCCERROR=yes
-NOCLANGERROR=yes
-CPPFLAGS+= -D_MINIX_SYSTEM
-
 # Makefile for libvirtio
 .include <bsd.own.mk>
 
+NOGCCERROR=yes
+
+CPPFLAGS+= -D_MINIX_SYSTEM
+
 LIB=	virtio
 
 SRCS=	virtio.c
diff --git a/minix/lib/libvirtio/virtio.c b/minix/lib/libvirtio/virtio.c
index c7ae655f9..1ff715a04 100644
--- a/minix/lib/libvirtio/virtio.c
+++ b/minix/lib/libvirtio/virtio.c
@@ -549,7 +549,7 @@ set_indirect_descriptors(struct virtio_device *dev, struct virtio_queue *q,
 	vd->len = num * sizeof(desc->descs[0]);
 
 	/* Initialize the descriptors in the indirect descriptor table */
-	for (i = 0; i < num; i++) {
+	for (i = 0; i < (int)num; i++) {
 		ivd = &desc->descs[i];
 
 		use_vring_desc(ivd, &bufs[i]);
diff --git a/minix/lib/libvirtio/virtio_ring.h b/minix/lib/libvirtio/virtio_ring.h
index 114f98e37..fc29d445f 100644
--- a/minix/lib/libvirtio/virtio_ring.h
+++ b/minix/lib/libvirtio/virtio_ring.h
@@ -133,7 +133,7 @@ static inline void vring_init(struct vring *vr, unsigned int num, void *p,
 {
 	vr->num = num;
 	vr->desc = p;
-	vr->avail = p + num*sizeof(struct vring_desc);
+	vr->avail = (void *)((char *)p + num*sizeof(struct vring_desc));
 	vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + sizeof(u16_t)
 		+ align-1) & ~(align - 1));
 }
diff --git a/minix/lib/libvtreefs/Makefile b/minix/lib/libvtreefs/Makefile
index 379d9b3cb..f885652fb 100644
--- a/minix/lib/libvtreefs/Makefile
+++ b/minix/lib/libvtreefs/Makefile
@@ -6,8 +6,6 @@ CPPFLAGS+= -D_MINIX_SYSTEM
 
 LIB=	vtreefs
 
-CPPFLAGS+= -I${NETBSDSRCDIR}/include
-
 SRCS=	\
 	inode.c \
 	link.c \