Move libspl_assertf into .c file

Variadic functions cannot be inlined. libspl_assertf ends up being
duplicated in every file that uses it.

Fix this by moving the function into a new assert.c. Also move the
definition of aok into the new file instead of zone.c.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10538

lib/libspl/Makefile.am

@@ -17,7 +17,10 @@ AM_CFLAGS += $(LIBTIRPC_CFLAGS)
 AM_CCASFLAGS = \
 	$(CFLAGS)
 
-noinst_LTLIBRARIES = libspl.la
+noinst_LTLIBRARIES = libspl_assert.la libspl.la
+
+libspl_assert_la_SOURCES = \
+	assert.c
 
 USER_C = \
 	list.c \
@@ -49,4 +52,7 @@ libspl_la_SOURCES = \
 	$(USER_C) \
 	$(TARGET_CPU_ATOMIC_SOURCE)
 
-libspl_la_LIBADD = -lrt $(LIBTIRPC_LIBS)
+libspl_la_LIBADD = \
+	libspl_assert.la
+
+libspl_la_LIBADD += -lrt $(LIBTIRPC_LIBS)

lib/libspl/assert.c

@@ -0,0 +1,46 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <assert.h>
+
+int aok = 0;
+
+/* printf version of libspl_assert */
+void
+libspl_assertf(const char *file, const char *func, int line,
+    const char *format, ...)
+{
+	va_list args;
+
+	va_start(args, format);
+	vfprintf(stderr, format, args);
+	fprintf(stderr, "\n");
+	fprintf(stderr, "ASSERT at %s:%d:%s()", file, line, func);
+	va_end(args);
+	if (aok) {
+		return;
+	}
+	abort();
+}

lib/libspl/include/assert.h

@@ -33,37 +33,18 @@
 #include <stdlib.h>
 #include <stdarg.h>
 
-#ifndef _KERNEL
+/* Set to non-zero to avoid abort()ing on an assertion failure */
 extern int aok;
-#endif
+
+/* printf version of libspl_assert */
+extern void libspl_assertf(const char *file, const char *func, int line,
+    const char *format, ...);
 
 static inline int
 libspl_assert(const char *buf, const char *file, const char *func, int line)
 {
-	fprintf(stderr, "%s\n", buf);
-	fprintf(stderr, "ASSERT at %s:%d:%s()", file, line, func);
-	if (aok) {
-		return (0);
-	}
-	abort();
-}
-
-/* printf version of libspl_assert */
-static inline void
-libspl_assertf(const char *file, const char *func, int line,
-    const char *format, ...)
-{
-	va_list args;
-
-	va_start(args, format);
-	vfprintf(stderr, format, args);
-	fprintf(stderr, "\n");
-	fprintf(stderr, "ASSERT at %s:%d:%s()", file, line, func);
-	va_end(args);
-	if (aok) {
-		return;
-	}
-	abort();
+	libspl_assertf(file, func, line, "%s", buf);
+	return (0);
 }
 
 #ifdef verify

lib/libspl/zone.c

@@ -27,8 +27,6 @@
 #include <string.h>
 #include <errno.h>
 
-int aok = 0;
-
 zoneid_t
 getzoneid()
 {