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| author | Qing Zhao <qing.zhao@oracle.com> | 2023-08-04 14:24:32 +0000 |
|---|---|---|
| committer | Qing Zhao <qing.zhao@oracle.com> | 2023-08-04 14:24:32 +0000 |
| commit | 44e3f39a3d5f08ac4129c0558a90e297d2dd1e30 (patch) | |
| tree | 45e33a40c8a0db363c0922e7344f438ea33cf9da /gcc | |
| parent | abf953042ace471720c1dc284b5f38e546fc0595 (diff) | |
| download | gcc-44e3f39a3d5f08ac4129c0558a90e297d2dd1e30.zip gcc-44e3f39a3d5f08ac4129c0558a90e297d2dd1e30.tar.gz gcc-44e3f39a3d5f08ac4129c0558a90e297d2dd1e30.tar.bz2 | |
Add documentation for -Wflex-array-member-not-at-end.
'-Wflex-array-member-not-at-end (C and C++ only)'
Warn when a structure containing a C99 flexible array member as the
last field is not at the end of another structure. This warning
warns e.g. about
struct flex { int length; char data[]; };
struct mid_flex { int m; struct flex flex_data; int n; };
gcc/ChangeLog:
* doc/invoke.texi (-Wflex-array-member-not-at-end): Document
new option.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/doc/invoke.texi | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index adb10a3..674f956 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -357,6 +357,7 @@ Objective-C and Objective-C++ Dialects}. -Wempty-body -Wno-endif-labels -Wenum-compare -Wenum-conversion -Wenum-int-mismatch -Werror -Werror=* -Wexpansion-to-defined -Wfatal-errors +-Wflex-array-member-not-at-end -Wfloat-conversion -Wfloat-equal -Wformat -Wformat=2 -Wno-format-contains-nul -Wno-format-extra-args -Wformat-nonliteral -Wformat-overflow=@var{n} @@ -9312,6 +9313,18 @@ value, like assigning a signed integer expression to an unsigned integer variable. An explicit cast silences the warning. In C, this option is enabled also by @option{-Wconversion}. +@opindex Wflex-array-member-not-at-end +@opindex Wno-flex-array-member-not-at-end +@item -Wflex-array-member-not-at-end @r{(C and C++ only)} +Warn when a structure containing a C99 flexible array member as the last +field is not at the end of another structure. +This warning warns e.g. about + +@smallexample +struct flex @{ int length; char data[]; @}; +struct mid_flex @{ int m; struct flex flex_data; int n; @}; +@end smallexample + @opindex Wfloat-conversion @opindex Wno-float-conversion @item -Wfloat-conversion |