Various fixes/updates

- Update HOWTO to note that directio and fallocate don't work with ZFS
  on Solaris.

Refactor the Makefile's to add CPPFLAGS and LIBS.
- Add -fno-omit-frame-pointer from Linux Makefile to every platform
- Change undefined $(ALL_CFLAGS) to $(CFLAGS)
- Pass -std=gnu99, without which OS X fails to build.
- Add -D__EXTENSIONS__ on Solaris since some functions we need are
  behind it.

- Pull in <limits.h> in fio.c to get PTHREAD_STACK_MIN.
- NetBSD doesn't define PTHREAD_STACK_MIN so set it to 4k in
   os-netbsd.h

- If we have posix_fallocate don't error out if it fails during mutex
  and malloc operations since it will fail on Solaris with a ZFS
  filesystem. As I understand it these aren't performance-critical
  operations so do they need to be considered critical?

- Remove fio_unused from os-* files since it's defined in fio.h and we
  don't really need it.

- FreeBSD has an idprio command but not the API so don't claim it does.

- OS X doesn't have the timer_* API so emulate it using
  setitimer/sigaction.

- NetBSD and Solaris don't support CLOCK_MONOTONIC in timer_create so
  remove FIO_HAVE_CLOCK_MONOTONIC from their os-* files.

I've noticed that a change I made a while ago to use fmin/fmax could
cause issues on older OSes - I had a CD with NetBSD 5.0.2 and found
they had only been implemented in 5.1 so I'm not sure if I should
revert it.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/Makefile.solaris b/Makefile.solaris
index 3b499e4..8423312 100644
--- a/Makefile.solaris
+++ b/Makefile.solaris
@@ -1,46 +1,46 @@
 CC	= gcc
-CFLAGS	= -Wall -O2 -g -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DFIO_INC_DEBUG
+DEBUGFLAGS = -DFIO_INC_DEBUG
+CPPFLAGS= -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 \
+	-D__EXTENSIONS__ $(DEBUGFLAGS)
+OPTFLAGS= -O2 -fno-omit-frame-pointer -g
+CFLAGS	= -std=gnu99 -Wall $(OPTFLAGS)
+LIBS	= -lpthread -lm -ldl -laio -lrt -lnsl -lsocket
 PROGS	= fio
 SCRIPTS = fio_generate_plots
-OBJS = gettime.o fio.o ioengines.o init.o stat.o log.o time.o filesetup.o \
-	eta.o verify.o memory.o io_u.o parse.o mutex.o options.o \
-	rbtree.o fifo.o smalloc.o filehash.o lib/strsep.o helpers.o solaris.o \
-	profile.o debug.o
 
-OBJS += lib/rand.o
-OBJS += lib/flist_sort.o
-OBJS += lib/num2str.o
+SOURCE = gettime.c fio.c ioengines.c init.c stat.c log.c time.c filesetup.c \
+	eta.c verify.c memory.c io_u.c parse.c mutex.c options.c rbtree.c \
+	fifo.c smalloc.c filehash.c lib/strsep.c helpers.c solaris.c \
+	profile.c debug.c lib/rand.c lib/flist_sort.c lib/num2str.c \
+	$(wildcard crc/*.c) engines/cpu.c engines/mmap.c engines/posixaio.c \
+	engines/sync.c engines/null.c engines/net.c engines/solarisaio.c
 
-OBJS += crc/crc7.o
-OBJS += crc/crc16.o
-OBJS += crc/crc32.o
-OBJS += crc/crc32c.o
-OBJS += crc/crc32c-intel.o
-OBJS += crc/crc64.o
-OBJS += crc/sha1.o
-OBJS += crc/sha256.o
-OBJS += crc/sha512.o
-OBJS += crc/md5.o
+OBJS = $(SOURCE:.c=.o)
 
-OBJS += engines/cpu.o
-OBJS += engines/mmap.o
-OBJS += engines/posixaio.o
-OBJS += engines/sync.o
-OBJS += engines/null.o
-OBJS += engines/net.o
-OBJS += engines/solarisaio.o
+ifneq ($(findstring $(MAKEFLAGS),s),s)
+ifndef V
+	QUIET_CC	= @echo '   ' CC $@;
+	QUIET_DEP	= @echo '   ' DEP $@;
+endif
+endif
 
 INSTALL = install
 prefix = /usr/local
 bindir = $(prefix)/bin
 mandir = $(prefix)/man
 
-%.o: %.c
-	$(CC) -o $*.o -c $(CFLAGS) $<
+.c.o:
+	$(QUIET_CC)$(CC) -o $@ -c $(CFLAGS) $(CPPFLAGS) $<
+	
 fio: $(OBJS)
-	$(CC) $(CFLAGS) -o $@ $(OBJS) $(EXTLIBS) -lpthread -lm -ldl -laio -lrt -lnsl -lsocket
+	$(QUIET_CC)$(CC) $(CFLAGS) -o $@ $(LIBS) $(OBJS)
+	
+depend:
+	$(QUIET_DEP)$(CC) -MM $(CFLAGS) $(CPPFLAGS) $(SOURCE) 1> .depend
 
-all: $(PROGS) $(SCRIPTS)
+$(PROGS): depend
+
+all: depend $(PROGS) $(SCRIPTS)
 
 clean:
 	-rm -f .depend cscope.out $(OBJS) $(PROGS) core.* core
@@ -54,3 +54,7 @@
 	$(INSTALL) -m 755 -d $(DESTDIR)$(mandir)/man1
 	$(INSTALL) -m 644 fio.1 $(DESTDIR)$(mandir)/man1
 	$(INSTALL) -m 644 fio_generate_plots.1 $(DESTDIR)$(mandir)/man1
+
+ifneq ($(wildcard .depend),)
+include .depend
+endif