randr: Clean up compiler warnings about unused and shadowing variables

set but not used variables
shadowing a previous local

A hidden problem was that the VERIFY_RR_* macros define local 'rc'
variables, any other local definitions for those would be shadowed and
generate warnings from gcc. I've renamed the other locals 'ret'
instead of 'rc'.

Signed-off-by: Keith Packard <keithp@keithp.com>
(cherry picked from commit 4ba340cfaa8d430c808566495f8deda0ff1b4424)

4 files changed, 13 insertions, 16 deletions

diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index 36caa5822..0c596dd4c 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -825,10 +825,9 @@ ProcRRSetCrtcConfig(ClientPtr client)
     int numOutputs;
     RROutputPtr *outputs = NULL;
     RROutput *outputIds;
-    TimeStamp configTime;
     TimeStamp time;
     Rotation rotation;
-    int rc, i, j;
+    int ret, i, j;
 
     REQUEST_AT_LEAST_SIZE(xRRSetCrtcConfigReq);
     numOutputs = (stuff->length - bytes_to_int32(SIZEOF(xRRSetCrtcConfigReq)));
@@ -855,11 +854,11 @@ ProcRRSetCrtcConfig(ClientPtr client)
 
     outputIds = (RROutput *) (stuff + 1);
     for (i = 0; i < numOutputs; i++) {
-        rc = dixLookupResourceByType((pointer *) (outputs + i), outputIds[i],
+        ret = dixLookupResourceByType((pointer *) (outputs + i), outputIds[i],
                                      RROutputType, client, DixSetAttrAccess);
-        if (rc != Success) {
+        if (ret != Success) {
             free(outputs);
-            return rc;
+            return ret;
         }
         /* validate crtc for this output */
         for (j = 0; j < outputs[i]->numCrtcs; j++)
@@ -904,7 +903,6 @@ ProcRRSetCrtcConfig(ClientPtr client)
     pScrPriv = rrGetScrPriv(pScreen);
 
     time = ClientTimeToServerTime(stuff->timestamp);
-    configTime = ClientTimeToServerTime(stuff->configTimestamp);
 
     if (!pScrPriv) {
         time = currentTime;
diff --git a/randr/rrinfo.c b/randr/rrinfo.c
index 114ec3471..1408d6f64 100644
--- a/randr/rrinfo.c
+++ b/randr/rrinfo.c
@@ -82,6 +82,7 @@ RRScanOldConfig(ScreenPtr pScreen, Rotation rotations)
     int i;
     CARD16 minWidth = MAXSHORT, minHeight = MAXSHORT;
     CARD16 maxWidth = 0, maxHeight = 0;
+    CARD16 width, height;
 
     /*
      * First time through, create a crtc and output and hook
@@ -141,11 +142,11 @@ RRScanOldConfig(ScreenPtr pScreen, Rotation rotations)
 
     /* find size bounds */
     for (i = 0; i < output->numModes + output->numUserModes; i++) {
-        RRModePtr mode = (i < output->numModes ?
+        mode = (i < output->numModes ?
                           output->modes[i] :
                           output->userModes[i - output->numModes]);
-        CARD16 width = mode->mode.width;
-        CARD16 height = mode->mode.height;
+        width = mode->mode.width;
+        height = mode->mode.height;
 
         if (width < minWidth)
             minWidth = width;
diff --git a/randr/rrmode.c b/randr/rrmode.c
index b637c06b9..49a45c7f6 100644
--- a/randr/rrmode.c
+++ b/randr/rrmode.c
@@ -173,7 +173,7 @@ RRModesForScreen(ScreenPtr pScreen, int *num_ret)
      */
     for (o = 0; o < pScrPriv->numOutputs; o++) {
         RROutputPtr output = pScrPriv->outputs[o];
-        int m, n;
+        int n;
 
         for (m = 0; m < output->numModes + output->numUserModes; m++) {
             RRModePtr mode = (m < output->numModes ?
@@ -285,7 +285,6 @@ ProcRRCreateMode(ClientPtr client)
     xRRCreateModeReply rep = { 0 };
     WindowPtr pWin;
     ScreenPtr pScreen;
-    rrScrPrivPtr pScrPriv;
     xRRModeInfo *modeInfo;
     long units_after;
     char *name;
@@ -298,7 +297,6 @@ ProcRRCreateMode(ClientPtr client)
         return rc;
 
     pScreen = pWin->drawable.pScreen;
-    pScrPriv = rrGetScrPriv(pScreen);
 
     modeInfo = &stuff->modeInfo;
     name = (char *) (stuff + 1);
diff --git a/randr/rroutput.c b/randr/rroutput.c
index 0890c55b5..091e06b8a 100644
--- a/randr/rroutput.c
+++ b/randr/rroutput.c
@@ -528,13 +528,13 @@ ProcRRSetOutputPrimary(ClientPtr client)
     RROutputPtr output = NULL;
     WindowPtr pWin;
     rrScrPrivPtr pScrPriv;
-    int rc;
+    int ret;
 
     REQUEST_SIZE_MATCH(xRRSetOutputPrimaryReq);
 
-    rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
-    if (rc != Success)
-        return rc;
+    ret = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
+    if (ret != Success)
+        return ret;
 
     if (stuff->output) {
         VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);