puzzles: Silence warning on arm with clang

Clang finds overflows when comparison is done between an unsigned char
and a integer constant. So explicitly typecast the constant before
comparison

Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 73 insertions, 0 deletions

diff --git a/meta/recipes-sato/puzzles/files/0001-palisade-Fix-warnings-with-clang-on-arm.patch b/meta/recipes-sato/puzzles/files/0001-palisade-Fix-warnings-with-clang-on-arm.patch
new file mode 100644
index 0000000000..5351f8eb4e
--- /dev/null
+++ b/meta/recipes-sato/puzzles/files/0001-palisade-Fix-warnings-with-clang-on-arm.patch
@@ -0,0 +1,72 @@
+From 6d8326275802a2e6e61d3e99460af6891ae8362f Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 13 Jan 2016 23:10:19 -0800
+Subject: [puzzles][PATCH] palisade: Fix warnings with clang on arm
+
+ARM treats 'char' as unsigned char when 'char' is not qualified with
+'signed' or 'unsigned' explicitly.
+
+This results in warnings e.g.
+
+palisade.c:531:22: error: comparison of constant -1 with expression of
+type 'clue' (aka 'char') is always false
+[-Werror,-Wtautological-constant-out-of-range-compare]
+        if (clues[i] == EMPTY) continue;
+
+Therefore, typcast the contant to char in such places to be explicit
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Submitted
+
+ palisade.c | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/palisade.c b/palisade.c
+index 984e616..2b9c25c 100644
+--- a/palisade.c
++++ b/palisade.c
+@@ -295,11 +295,11 @@ static void solver_connected_clues_versus_region_size(solver_ctx *ctx)
+      * If p = q = 3 then the region has size exactly 2. */
+ 
+     for (i = 0; i < wh; ++i) {
+-        if (ctx->clues[i] == EMPTY) continue;
++        if (ctx->clues[i] == (char)EMPTY) continue;
+         for (dir = 0; dir < 4; ++dir) {
+             int j = i + dx[dir] + w*dy[dir];
+             if (disconnected(ctx, i, j, dir)) continue;
+-            if (ctx->clues[j] == EMPTY) continue;
++            if (ctx->clues[j] == (char)EMPTY) continue;
+             if ((8 - ctx->clues[i] - ctx->clues[j] > ctx->params->k) ||
+                 (ctx->clues[i] == 3 && ctx->clues[j] == 3 &&
+                  ctx->params->k != 2))
+@@ -317,7 +317,7 @@ static int solver_number_exhausted(solver_ctx *ctx)
+     int changed = FALSE;
+ 
+     for (i = 0; i < wh; ++i) {
+-        if (ctx->clues[i] == EMPTY) continue;
++        if (ctx->clues[i] == (char)EMPTY) continue;
+ 
+         if (bitcount[(ctx->borders[i] & BORDER_MASK)] == ctx->clues[i]) {
+             for (dir = 0; dir < 4; ++dir) {
+@@ -528,7 +528,7 @@ static int is_solved(const game_params *params, clue *clues,
+     for (i = 0; i < wh; ++i) {
+         if (dsf[i] == UNVISITED) dfs_dsf(i, params->w, border, dsf, TRUE);
+         if (dsf_size(dsf, i) != k) goto error;
+-        if (clues[i] == EMPTY) continue;
++        if (clues[i] == (char)EMPTY) continue;
+         if (clues[i] != bitcount[border[i] & BORDER_MASK]) goto error;
+     }
+ 
+@@ -674,7 +674,7 @@ static char *new_game_desc(const game_params *params, random_state *rs,
+     p = numbers;
+     r = 0;
+     for (i = 0; i < wh; ++i) {
+-        if (numbers[i] != EMPTY) {
++        if (numbers[i] != (char)EMPTY) {
+             while (r) {
+                 while (r > 26) {
+                     *p++ = 'z';
+-- 
+2.7.0
+
diff --git a/meta/recipes-sato/puzzles/puzzles_git.bb b/meta/recipes-sato/puzzles/puzzles_git.bb
index 9c8170cbdb..dab5440d8f 100644
--- a/meta/recipes-sato/puzzles/puzzles_git.bb
+++ b/meta/recipes-sato/puzzles/puzzles_git.bb
@@ -13,6 +13,7 @@ SRC_URI = "git://git.tartarus.org/simon/puzzles.git \
            file://fix-compiling-failure-with-option-g-O.patch \
            file://0001-Use-labs-instead-of-abs.patch \
            file://0001-rect-Fix-compiler-errors-about-uninitialized-use-of-.patch \
+           file://0001-palisade-Fix-warnings-with-clang-on-arm.patch \
 "
 SRCREV = "346584bf6e38232be8773c24fd7dedcbd7b3d9ed"
 PE = "1"