From 1f232abc8938cc1fe821a6a8504b3845bad89522 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Wed, 8 Aug 2012 11:04:18 +0000
Subject: 	Throughout, run newlib with -Wall -Werror option and fix bugs
 and 	compiler warnings found this way.

	* libc/stdio/freopen.c (_freopen_r): Fix bug setting _flags.

	* libc/include/stdio.h (_rename): Define when building newlib.
	* libc/include/sys/signal.h (_kill): Ditto.
	* libc/include/sys/stat.h (_mkdir): Ditto.
	* libc/include/sys/time.h (_gettimeofday): Ditto.
	* libc/include/sys/times.h (_times): Ditto.
	* libc/include/sys/wait.h (_wait): Ditto.
	* libc/locale/lmessages.c (empty): Don't define for Cygwin.
	* libc/locale/lmonetary.c (cnv): Ditto.
	* libc/locale/nl_langinfo.c (nl_langinfo): Ditto for variable s.
	* libc/posix/collate.c: Throughout cast to avoid compiler warning.
	* libc/posix/engine.c (matcher): Initialize dp to avoid compiler
	warning.
	* libc/posix/glob.c: Disable on Cygwin.  Explain why.
	* libc/posix/regcomp.c: Fix "uninitialized" compiler warnings.
	(dissect): Deliberately silence gcc compiler warning.  Add comment to
	explain why.
	* libc/posix/wordexp.c (wordexp): Remove num_bytes variable since result
	is never used.
	* libc/posix/popen.c (popen): Ditto for variable last.
	* libc/reent/mkdirr.c: Include sys/stat.h.
	* libc/reent/renamer.c: Include stdio.h.
	* libc/search/hash.c:  Throughout use underscored variants of the stat
	function family.
	(init_hash): Add missing definition for the __USE_INTERNAL_STAT64 case.
	* libc/search/hash_bigkey.c (__big_insert): Add parenthesis to avoid
	compiler warning.
	* libc/search/hash_page.c (overflow_page): Initalize freep to NULL to
	avoid compiler warning.
	* libc/stdio/asiprintf.c (_asiprintf_r): Cast unsigned char * to char *
	to avoid compiler warning.
	(asiprintf): Ditto.
	* libc/stdio/asprintf.c (_asprintf_r): Ditto.
	(asprintf): Ditto.
	* libc/stdio/vasiprintf.c (_vasiprintf_r): Ditto.
	* libc/stdio/vasprintf.c (_vasprintf_r): Ditto.
	* libc/stdio/mktemp.c (_gettemp): Cast to unsigned char in call to
	isdigit to avoid compiler warning.
	* libc/stdio/vfprintf.c (_VFPRINTF_R): Initialize variables used for
	grouping to avoid compiler warning.  Only define and set nseps and
	nrepeats if they are really used.
	* libc/stdio/vfwprintf.c (_VFWPRINTF_R): Ditto.  Only define state if
	it is really used.
	* libc/stdio/vfscanf.c (u_char): Revert to be defined as unsigned char.
	(__SVFSCANF_R): Cast fmt in call to __mbtowc.
	* libc/stdlib/mbtowc_r.c (JIS_state_table): Disable when building
	Cygwin.
	(JIS_action_table): Ditto.
	* libc/stdlib/wctomb_r.c (__utf8_wctomb): Add parenthesis to avoid
	compiler warning.
	* libc/string/strcasestr.c: Deliberately silence gcc compiler warning.
	Add comment to explain why.
	* libc/time/strptime.c (strptime): Cast to unsigned char in calls to
	isspace to avoid compiler warning.
	* libm/math/e_atan2.c (__ieee754_atan2): Add parenthesis to avoid
	compiler warning.
	* libm/math/e_exp.c (__ieee754_exp): Initialize k to 0 to avoid
	compiler warning.  Drop setting it to 0 later.
	* libm/math/ef_exp.c (__ieee754_expf): Ditto.
	* libm/math/e_pow.c (__ieee754_pow): Add braces to avoid compiler
	warning.
	* libm/math/ef_pow.c (__ieee754_powf): Ditto.
	* libm/math/er_lgamma.c (__ieee754_lgamma_r): Initialize nadj to 0 to
	avoid compiler warning.
	* libm/math/erf_lgamma.c (__ieee754_lgammaf_r): Ditto.
	* libm/math/e_rem_pio2.c (__ieee754_rem_pio2): Ditto for variable z.
	* libm/common/sf_round.c (roundf): Remove signbit variable since result
	is never used.
---
 newlib/libc/posix/engine.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'newlib/libc/posix/engine.c')

diff --git a/newlib/libc/posix/engine.c b/newlib/libc/posix/engine.c
index 8494b90a9..5956e2747 100644
--- a/newlib/libc/posix/engine.c
+++ b/newlib/libc/posix/engine.c
@@ -145,7 +145,7 @@ int eflags;
 	int i;
 	struct match mv;
 	struct match *m = &mv;
-	char *dp;
+	char *dp = NULL;
 	const sopno gf = g->firststate+1;	/* +1 for OEND */
 	const sopno gl = g->laststate;
 	char *start;
@@ -181,8 +181,8 @@ int eflags;
 			pp = mustlast;
 			for (dp = start+g->mlen-1; dp < stop;) {
 				/* Fast skip non-matches */
-				while (dp < stop && charjump[*dp])
-					dp += charjump[*dp];
+				while (dp < stop && charjump[(unsigned char) *dp])
+					dp += charjump[(unsigned char) *dp];
 
 				if (dp >= stop)
 					break;
@@ -198,7 +198,7 @@ int eflags;
 
 				/* Jump to next possible match */
 				mj = matchjump[pp - mustfirst];
-				cj = charjump[*dp];
+				cj = charjump[(unsigned char) *dp];
 				dp += (cj < mj ? mj : cj);
 				pp = mustlast;
 			}
@@ -364,6 +364,9 @@ sopno stopst;
 	char *ssp;		/* start of string matched by subsubRE */
 	char *sep;		/* end of string matched by subsubRE */
 	char *oldssp;		/* previous ssp */
+/* dp is only used for assertion testing which, for some reason, is not
+   recognized as usage. */
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
 	char *dp;
 
 	AT("diss", start, stop, startst, stopst);
-- 
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