> Begin forwarded message:
>
> From: Jeffrey Johnson <n3...@me.com>
> Subject: GNULIB is adding -Wmissing-prototypes in config.h
> Date: July 10, 2017 at 2:02:15 PM EDT
> To: bug-gnulib@gnu.org
>
> This is a minor (but annoying warning spewage) gnulib addition to config.h
> when compiling with G++
>
> In file included from <command-line>:0:0:
> ./../../config.h:10238:5: warning: option ‘-Wmissing-prototypes’ is valid for
> C/ObjC but not for C++ [-Wpragmas]
> _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
> ^
>
> The code around line 10238 in config.h looks like this:
>
> #if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
> # if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
> # define _GL_INLINE_HEADER_CONST_PRAGMA
> # else
> # define _GL_INLINE_HEADER_CONST_PRAGMA \
> _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
> # endif
> /* Suppress GCC's bogus "no previous prototype for 'FOO'"
> and "no previous declaration for 'FOO'" diagnostics,
> when FOO is an inline function in the header; see
> <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113
> <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>>. */
> # define _GL_INLINE_HEADER_BEGIN \
> _Pragma ("GCC diagnostic push") \
> _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
> _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
> _GL_INLINE_HEADER_CONST_PRAGMA
> # define _GL_INLINE_HEADER_END \
> _Pragma ("GCC diagnostic pop")
> #else
> # define _GL_INLINE_HEADER_BEGIN
> # define _GL_INLINE_HEADER_END
> #endif
>
> Conditioning the define with “#ifndef __cplusplus” makes the warning go away:
>
> _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
>
> $ g++ --version
> g++ (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1)
>
> hth
>
> 73 de Jeff
>
