diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 8301a0a..d8f69e8 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -238,7 +238,7 @@ Objective-C and Objective-C++ Dialects}. -Wmain -Wmissing-braces -Wmissing-field-initializers @gol -Wmissing-format-attribute -Wmissing-include-dirs @gol -Wmissing-noreturn @gol --Wno-multichar -Wnonnull -Wpacked -Wpadded @gol +-Wno-multichar -Wnonnull -Woverlength-strings -Wpacked -Wpadded @gol -Wparentheses -Wpointer-arith -Wno-pointer-to-int-cast @gol -Wredundant-decls @gol -Wreturn-type -Wsequence-point -Wshadow @gol @@ -3444,6 +3444,21 @@ even when intentional, result in unspecified behavior and are not portable. Usually these warnings alert that the programmer intended to use @code{strcmp}. This warning is enabled by @option{-Wall}. +@item -Woverlength-strings +@opindex Woverlength-strings +Warn about string constants which are longer than the ``minimum +maximum'' length specified in the C standard. Modern compilers +generally allow string constants which are much longer than the +standard's minimum limit, but very portable programs should avoid +using longer strings. + +The limit applies @emph{after} string constant concatenation, and does +not count the trailing NUL@. In C89, the limit was 509 characters; in +C99, it was raised to 4095. C++98 does not specify a normative +minimum maximum, so we do not diagnose overlength strings in C++@. + +This option is implied by @option{-pedantic}, and can be disabled with +@option{-Wno-overlength-strings}. @end table @node Debugging Options |