--- a/gcc/fortran/options.c +++ b/gcc/fortran/options.c @@ -693,6 +693,10 @@ gfc_handle_option (size_t scode, const char *arg, int value, gfc_option.warn_line_truncation = value; break;
+ case OPT_Wmissing_return: + warn_missing_return = value; + break; + case OPT_Wrealloc_lhs: gfc_option.warn_realloc_lhs = value; break; The entry in c.opt says this is a C/C++ option, why you need this? +Wmissing-return +C ObjC C++ ObjC++ Var(warn_missing_return) LangEnabledBy(C ObjC C++ ObjC++,Wreturn-type) +Warn whenever control may reach end of non-void function This should prevent that using -Wreturn-type in Fortran tries to enable -Wmissing-return, if not that is a bug. In any case, the work-around should be adding Wmissing-return to fortran/lang.opt with a ??? comment, not there. --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -472,7 +472,7 @@ C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning LangEnabledBy(C Warn about implicit function declarations Wimplicit-int -C ObjC Var(warn_implicit_int) Warning LangEnabledBy(C ObjC,Wimplicit) +C ObjC Var(warn_implicit_int) Warning Warn when a declaration does not specify a type Wimport diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 5ae910c..3f2019a 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -3615,7 +3615,7 @@ This warning is enabled by @option{-Wall} in C++. @opindex Wimplicit-int @opindex Wno-implicit-int Warn when a declaration does not specify a type. -This warning is enabled by @option{-Wall}. +This warning is enabled by default. @item -Wimplicit-function-declaration @r{(C and Objective-C only)} @opindex Wimplicit-function-declaration Does this patch actually enables -Wimplicit-int by default? The default without Init() should be zero! And according to this: https://gcc.gnu.org/ml/gcc-patches/2014-06/msg01367.html we still want -Wno-implicit to disable -Wimplicit-int (and -Werror=implicit to set -Werror=implicit-int), so the LangEnabledBy() should stay. The documentation could say: "This warning is enabled by default and it is also controlled by -Wimplicit." Cheers, Manuel.