diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 2cef7e6..9f22681 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -255,7 +255,7 @@ Objective-C and Objective-C++ Dialects}. @item C-only Warning Options @gccoptlist{-Wbad-function-cast -Wmissing-declarations @gol -Wmissing-prototypes -Wnested-externs -Wold-style-definition @gol --Wstrict-prototypes -Wtraditional @gol +-Wstrict-prototypes -Wtraditional -Wtraditional-conversion @gol -Wdeclaration-after-statement -Wpointer-sign} @item Debugging Options @@ -3058,7 +3058,7 @@ traditional C case. Conversions by prototypes between fixed/floating point values and vice versa. The absence of these prototypes when compiling with traditional C would cause serious problems. This is a subset of the possible -conversion warnings, for the full set use @option{-Wconversion}. +conversion warnings, for the full set use @option{-Wtraditional-conversion}. @item Use of ISO C style function definitions. This warning intentionally is @@ -3070,6 +3070,14 @@ because that feature is already a GCC extension and thus not relevant to traditional C compatibility. @end itemize +@item -Wtraditional-conversion @r{(C only)} +@opindex Wtraditional-conversion +Warn if a prototype causes a type conversion that is different from what +would happen to the same argument in the absence of a prototype. This +includes conversions of fixed point to floating and vice versa, and +conversions changing the width or signedness of a fixed point argument +except when the same as the default promotion. + @item -Wdeclaration-after-statement @r{(C only)} @opindex Wdeclaration-after-statement Warn when a declaration is found after a statement in a block. This @@ -3148,16 +3156,10 @@ this is why we did not make @option{-Wall} request these warnings. @item -Wconversion @opindex Wconversion -Warn if a prototype causes a type conversion that is different from what -would happen to the same argument in the absence of a prototype. This -includes conversions of fixed point to floating and vice versa, and -conversions changing the width or signedness of a fixed point argument -except when the same as the default promotion. - -Also, warn if a negative integer constant expression is implicitly -converted to an unsigned type. For example, warn about the assignment -@code{x = -1} if @code{x} is unsigned. But do not warn about explicit -casts like @code{(unsigned) -1}. +Warn if a negative integer constant expression is implicitly converted +to an unsigned type. For example, warn about the assignment +@code{unsigned x = -1} if @code{x} is unsigned. But do not warn about +explicit casts like @code{(unsigned) -1}. @item -Wsign-compare @opindex Wsign-compare |