diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/gm2.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/doc/gm2.texi b/gcc/doc/gm2.texi index ae87434..8d5d95f 100644 --- a/gcc/doc/gm2.texi +++ b/gcc/doc/gm2.texi @@ -664,6 +664,17 @@ issue a warning if a variable is used before it is initialized. The checking only occurs in the first basic block in each procedure. It does not check parameters, array types or set types. +@item -Wuninit-variable-checking=all,known,cond +issue a warning if a variable is used before it is initialized. +The checking will only occur in the first basic block in each +procedure if @samp{known} is specified. If @samp{cond} or @samp{all} +is specified then checking continues into conditional branches of the +flow graph. All checking will stop when a procedure call is invoked +or the top of a loop is encountered. +The option @samp{-Wall} will turn on this flag with +@samp{-Wuninit-variable-checking=known}. +The @samp{-Wuninit-variable-checking=all} will increase compile time. + @c the following warning options are complete but need to be @c regression tested against all other front ends @c to ensure the options do not conflict. |