Warning for functions called before declared inline

[Joseph S. Myers]

On Thu, 1 Dec 2011, Steven Bosscher wrote:

> Is it valid in dialects older than C99 to declare a function static
> inline after calling it? Should the warnings be brought back in the
> compiler?

Older dialects didn't have inline.

> One reason to bring the warnings back could be that there is now no
> way for anyone bootstrapping GCC to detect this warning. If it is
> still a goal that recently modern GCC's should be able to build the
> latest GCC, then it would be good if the latest GCC warns about the
> same things in a given C dialect as older GCC versions do.

Building with older GCC should not use -Werror; only later bootstrap 
stages, or --enable-werror-always, should do so, and 
--enable-werror-always is meant to be used for building a cross-compiler 
using the same version of GCC.  In general GCC is only clean for warnings 
with the same version of GCC; building with 4.3 will give plenty of 
warnings relating to changes in GCC's internal diagnostic format as well.

-- 
Joseph S. Myers
joseph@codesourcery.com