Fix -DNEDUG builds

- assert() is macro which is defined as empty, while panic is always
   present. I added an explicit abort() after the macro to make sure the
   function never returns in case of wrong flags.

 - Fixed gcc build with -NDEBUG, -Os for ARM.
   * A few 'may be used uninitialized' messages
   * A few new missing support library functions where added in libminc.

Change-Id: I69fcda2cd3888390b7ddeff4c0cd849105ce86ff

external/bsd/flex/dist/scanopt.c

@@ -715,6 +715,11 @@ int     scanopt (svoid, arg, optindex)
 	struct _aux *auxp;
 	int     is_short;
 	int     opt_offset = -1;
+#if defined(__minix)
+	/* triggers a 'may be used uninitialized', when compiled with gcc,
+	 * asserts off, and -Os. */
+	is_short = 0;
+#endif /* defined(__minix) */
 
 	s = (struct _scanopt_t *) svoid;
 

minix/lib/libc/gen/fslib.c

@@ -4,6 +4,7 @@
 #include <limits.h>
 #include <dirent.h>
 #include <assert.h>
+#include <stdlib.h>		/* for abort() */
 #include <sys/types.h>
 #include <minix/const.h>
 #include <minix/type.h>		/* for unshort :-( */
@@ -56,5 +57,8 @@ uint8_t fs_mode_to_type(mode_t mode)
 	else if(S_ISSOCK(mode)) return DT_SOCK;
 
 	assert(0 && "unknown type");
+
+	/* assert()s are removed on NDEBUG builds. */
+	abort();
 }
 

minix/lib/libminc/Makefile

@@ -127,7 +127,8 @@ CPPFLAGS.sha2.c+=	-D_STANDALONE
 CPPFLAGS.sha2.c+=	-I${NETBSDSRCDIR}/sys
 
 .for f in \
-	divdi3.o moddi3.o udivdi3.o umoddi3.o qdivrem.o
+	ashrdi3.o divdi3.o lshldi3.o lshrdi3.o moddi3.o \
+	udivdi3.o umoddi3.o qdivrem.o
 ${f} ${f:C/\.o/.bc/}:	${LIBCOMMONCDIR}/quad/${f:C/\.o/.c/}
 OBJS+=	${f}
 CLEANFILES+= ${f}

usr.bin/make/targ.c

@@ -338,6 +338,11 @@ Targ_FindNode(const char *name, int flags)
     Boolean	  isNew;      /* Set TRUE if Hash_CreateEntry had to create */
 			      /* an entry for the node */
 
+#if defined(__minix)
+    /* triggers a 'may be used uninitialized', when compiled with gcc,
+     * asserts off, and -Os. */
+    he = NULL;
+#endif /* defined(__minix) */
     if (!(flags & (TARG_CREATE | TARG_NOHASH))) {
 	he = Hash_FindEntry(&targets, name);
 	if (he == NULL)

usr.bin/mkdep/mkdep.c

@@ -230,9 +230,13 @@ main(int argc, char **argv)
 	const char *prefix = NULL;
 	const char *suffixes = NULL, *s;
 	suff_list_t *suff_list = NULL, *sl;
-#ifdef __minix
+#if defined(__minix)
 	size_t nr;
-#endif
+
+	/* triggers a 'may be used uninitialized', when compiled with gcc,
+	 * asserts off, and -Os. */
+	slen = 0;
+#endif /* defined(__minix) */
 
 	suf = NULL;		/* XXXGCC -Wuninitialized [sun2] */
 	sl = NULL;		/* XXXGCC -Wuninitialized [sun2] */

usr.bin/vis/vis.c

@@ -166,6 +166,11 @@ process(FILE *fp)
 	char buff[4 * MB_LEN_MAX + 1]; /* max encoding length for one char */
 	int mbilen, cerr = 0, raerr = 0;
 	
+#if defined(__minix)
+	/* triggers a 'may be used uninitialized', when compiled with gcc,
+	 * asserts off, and -Os. */
+	rachar = 0;
+#endif /* defined(__minix) */
         /*
          * The input stream is considered to be multibyte characters.
          * The input loop will read this data inputing one character,