{"id":2224776,"url":"http://patchwork.ozlabs.org/api/patches/2224776/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/05d29abb-a190-4318-b724-b83be9b93acf@hexco.de/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/projects/17/?format=json","name":"GNU Compiler Collection","link_name":"gcc","list_id":"gcc-patches.gcc.gnu.org","list_email":"gcc-patches@gcc.gnu.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<05d29abb-a190-4318-b724-b83be9b93acf@hexco.de>","list_archive_url":null,"date":"2026-04-18T14:11:44","name":"doc: update list of -Wextra options in invoke.texi","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"a69684b6357e946df1f28f118c9574fdd2a62088","submitter":{"id":93079,"url":"http://patchwork.ozlabs.org/api/people/93079/?format=json","name":"Heiko Eißfeldt","email":"heiko.Eissfeldt@hexco.de"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/05d29abb-a190-4318-b724-b83be9b93acf@hexco.de/mbox/","series":[{"id":500443,"url":"http://patchwork.ozlabs.org/api/series/500443/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=500443","date":"2026-04-18T14:11:44","name":"doc: update list of -Wextra options in invoke.texi","version":1,"mbox":"http://patchwork.ozlabs.org/series/500443/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2224776/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2224776/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=hexco.de header.i=heiko.eissfeldt@hexco.de\n header.a=rsa-sha256 header.s=s1-ionos header.b=j6SjjWPf;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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Whenever the individual option was described as being enabled \nwith -Wextra I checked whether this option is listed under the \ndescription of -Wextra. I could add 3 missing named options and remove \none unnamed warning \"Ambiguous virtual bases\", which now seems to be \n-Winaccessible-base. I found that -Wenum-conversion also warns for \nObjective-C (which I added) and -Wno-builtin-declaration-mismatch is \navailable for C and Objective-C. In the example code for \n-Wno-builtin-declaration-mismatch I found that this is only working as \ndescribed for C versions up to C18, but not anymore for C23, which \nproduces an error here instead. This is intended for the upcoming 16.1 \nrelease. 2026-04-18 Heiko Eißfeldt\n\nPR middle-end/7651\n\t* gcc/doc/invoke.texi (-Wextra):\n\tupdate list of enabled warning options for -Wextra\n\tadd language dependencies for -Wenum-conversion and\n-Wno-builtin-declaration-mismatch\n\tadd C version to-Wno-builtin-declaration-mismatch\n\texample code description","diff":"diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi\nindex 9207a021e64..db15d98d104 100644\n--- a/gcc/doc/invoke.texi\n+++ b/gcc/doc/invoke.texi\n@@ -6909,8 +6909,10 @@ name is still supported, but the newer name is more descriptive.)\n -Wempty-body\n -Wenum-conversion @r{(only for C/ObjC)}\n -Wexpansion-to-defined\n--Wignored-qualifiers @r{(only for C/C++)}\n+-Wignored-qualifiers @r{(only for C/C++)}\n+-Winaccessible-base @r{(C++ and Objective-C++ only)}\n -Wimplicit-fallthrough=3\n+-Wmaybe-musttail-local-addr\n -Wmaybe-uninitialized\n -Wmissing-field-initializers\n -Wmissing-parameter-name @r{(C/ObjC only)}\n@@ -6923,6 +6925,7 @@ name is still supported, but the newer name is more descriptive.)\n -Wsign-compare @r{(C++ and Objective-C++ only)}\n -Wsized-deallocation @r{(C++ and Objective-C++ only)}\n -Wstring-compare\n+-Wtemplate-names-tu-local\n -Wtype-limits\n -Wuninitialized\n -Wunterminated-string-initialization @r{(C/ObjC only)}\n@@ -6942,9 +6945,6 @@ A pointer is compared against integer zero with @code{<}, @code{<=},\n (C++ only) An enumerator and a non-enumerator both appear in a\n conditional expression.\n \n-@item\n-(C++ only) Ambiguous virtual bases.\n-\n @item\n (C++ only) Subscripting an array that has been declared @code{register}.\n \n@@ -10424,7 +10424,7 @@ enabled by @option{-Wall}.\n @item -Wenum-conversion\n Warn when a value of enumerated type is implicitly converted to a\n different enumerated type. This warning is enabled by @option{-Wextra}\n-in C@.\n+in C and Objective-C@.\n \n @opindex Wenum-int-mismatch\n @opindex Wno-enum-int-mismatch\n@@ -10711,7 +10711,7 @@ Note that @option{-Wno-attributes=} does not imply @option{-Wno-attributes}.\n \n @opindex Wno-builtin-declaration-mismatch\n @opindex Wbuiltin-declaration-mismatch\n-@item -Wno-builtin-declaration-mismatch\n+@item -Wno-builtin-declaration-mismatch @r{(C and Objective-C only)}\n Warn if a built-in function is declared with an incompatible signature\n or as a non-function, or when a built-in function declared with a type\n that does not include a prototype is called with arguments whose promoted\n@@ -10721,9 +10721,9 @@ declared without a prototype. The @option{-Wbuiltin-declaration-mismatch}\n warning is enabled by default. To avoid the warning include the appropriate\n header to bring the prototypes of built-in functions into scope.\n \n-For example, the call to @code{memset} below is diagnosed by the warning\n-because the function expects a value of type @code{size_t} as its argument\n-but the type of @code{32} is @code{int}. With @option{-Wextra},\n+For example, up to C18 the call to @code{memset} below is diagnosed by the\n+warning because the function expects a value of type @code{size_t} as its\n+argument but the type of @code{32} is @code{int}. With @option{-Wextra},\n the declaration of the function is diagnosed as well.\n @smallexample\n extern void* memset ();\n","prefixes":[]}