Bug #43414 Parenthesis (and other) warnings compiling MySQL

with gcc 4.3.2
      
This patch fixes a number of GCC warnings about variables used
before initialized. A new macro UNINIT_VAR() is introduced for
use in the variable declaration, and LINT_INIT() usage will be
gradually deprecated. (A workaround is used for g++, pending a
patch for a g++ bug.)
      
GCC warnings for unused results (attribute warn_unused_result)
for a number of system calls (present at least in later
Ubuntus, where the usual void cast trick doesn't work) are
also fixed.

3 files changed, 8 insertions, 8 deletions

diff --git a/cmd-line-utils/readline/bind.c b/cmd-line-utils/readline/bind.c
index aa5bd3d829a..85f6b432bf8 100644
--- a/cmd-line-utils/readline/bind.c
+++ b/cmd-line-utils/readline/bind.c
@@ -339,9 +339,7 @@ rl_generic_bind (type, keyseq, data, map)
   char *keys;
   int keys_len;
   register int i;
-  KEYMAP_ENTRY k;
-
-  k.function = 0;
+  KEYMAP_ENTRY k= { 0, NULL };
 
   /* If no keys to bind to, exit right away. */
   if (keyseq == 0 || *keyseq == 0)
@@ -776,7 +774,7 @@ _rl_read_file (filename, sizep)
   file_size = (size_t)finfo.st_size;
 
   /* check for overflow on very large files */
-if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||  
+  if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||  
     file_size + 1 < file_size)
     {
       if (file >= 0)
diff --git a/cmd-line-utils/readline/histfile.c b/cmd-line-utils/readline/histfile.c
index 118c5ebd328..cbd367542ce 100644
--- a/cmd-line-utils/readline/histfile.c
+++ b/cmd-line-utils/readline/histfile.c
@@ -186,7 +186,7 @@ read_history_range (filename, from, to)
   file_size = (size_t)finfo.st_size;
 
   /* check for overflow on very large files */
-if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||  
+  if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||  
     file_size + 1 < file_size)
     {
       errno = overflow_errno;
@@ -311,6 +311,7 @@ history_truncate_file (fname, lines)
   int file, chars_read, rv;
   struct stat finfo;
   size_t file_size;
+  size_t bytes_written;
 
   buffer = (char *)NULL;
   filename = history_filename (fname);
@@ -340,7 +341,7 @@ history_truncate_file (fname, lines)
   file_size = (size_t)finfo.st_size;
 
   /* check for overflow on very large files */
-if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||  
+  if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||  
     file_size + 1 < file_size)
     {
       close (file);
@@ -400,7 +401,7 @@ if ((sizeof(off_t) > sizeof(size_t) && finfo.st_size > (off_t)(size_t)~0) ||
      truncate to. */
   if (bp > buffer && ((file = open (filename, O_WRONLY|O_TRUNC|O_BINARY, 0600)) != -1))
     {
-      write (file, bp, chars_read - (bp - buffer));
+      bytes_written= write (file, bp, chars_read - (bp - buffer));
 
 #if defined (__BEOS__)
       /* BeOS ignores O_TRUNC. */
diff --git a/cmd-line-utils/readline/undo.c b/cmd-line-utils/readline/undo.c
index 79846c26024..c6bd044c3a3 100644
--- a/cmd-line-utils/readline/undo.c
+++ b/cmd-line-utils/readline/undo.c
@@ -137,7 +137,8 @@ UNDO_LIST *
 _rl_copy_undo_list (head)
      UNDO_LIST *head;
 {
-  UNDO_LIST *list, *new, *roving, *c;
+  UNDO_LIST *list, *new, *c;
+  UNDO_LIST *roving= NULL;
 
   list = head;
   new = 0;