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| author | Hamza Mahfooz <someguy@effective-light.com> | 2023-07-31 19:03:47 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2023-07-31 19:03:47 +0000 |
| commit | ffc74822468a39324722eef4c4412ea3224ca976 (patch) | |
| tree | 7b257346376759ccd7b4a037bbcbe8a02af21cbd /gcc/doc | |
| parent | ac0e0966ebf08c454d53042a649403e2880ccbc1 (diff) | |
| download | gcc-ffc74822468a39324722eef4c4412ea3224ca976.zip gcc-ffc74822468a39324722eef4c4412ea3224ca976.tar.gz gcc-ffc74822468a39324722eef4c4412ea3224ca976.tar.bz2 | |
c: add -Wmissing-variable-declarations [PR65213]
Resolves:
PR c/65213 - Extend -Wmissing-declarations to variables [i.e. add
-Wmissing-variable-declarations]
gcc/c-family/ChangeLog:
PR c/65213
* c.opt (-Wmissing-variable-declarations): New option.
gcc/c/ChangeLog:
PR c/65213
* c-decl.cc (start_decl): Handle
-Wmissing-variable-declarations.
gcc/ChangeLog:
PR c/65213
* doc/invoke.texi (-Wmissing-variable-declarations): Document
new option.
gcc/testsuite/ChangeLog:
PR c/65213
* gcc.dg/Wmissing-variable-declarations.c: New test.
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index c43260f..104766f 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -498,8 +498,8 @@ Objective-C and Objective-C++ Dialects}. @item C and Objective-C-only Warning Options @gccoptlist{-Wbad-function-cast -Wmissing-declarations --Wmissing-parameter-type -Wmissing-prototypes -Wnested-externs --Wold-style-declaration -Wold-style-definition +-Wmissing-parameter-type -Wmissing-prototypes -Wmissing-variable-declarations +-Wnested-externs -Wold-style-declaration -Wold-style-definition -Wstrict-prototypes -Wtraditional -Wtraditional-conversion -Wdeclaration-after-statement -Wpointer-sign} @@ -9611,6 +9611,13 @@ provide prototypes and a non-matching declaration declares an overload rather than conflict with an earlier declaration. Use @option{-Wmissing-declarations} to detect missing declarations in C++. +@opindex Wmissing-variable-declarations +@opindex Wno-missing-variable-declarations +@item -Wmissing-variable-declarations @r{(C and Objective-C only)} +Warn if a global variable is defined without a previous declaration. +Use this option to detect global variables that do not have a matching +extern declaration in a header file. + @opindex Wmissing-declarations @opindex Wno-missing-declarations @item -Wmissing-declarations |