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>. */
# 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
