[vlc-devel] [PATCH] configure: fail on casting incompatible pointers

[Steve Lhomme]

On 2019-10-02 12:20, Rémi Denis-Courmont wrote:
> And VLC depends on some libraries that rely on bad casts, notably 
> libavutil (heap helpers).

This is the configure script of VLC, not the contribs. I use this flag 
all day long on Win32 and Linux builds with no issue. That enables 
spotting errors like the AMT one very quickly.

> Le 2 octobre 2019 13:18:30 GMT+03:00, "Rémi Denis-Courmont" 
> <remi at remlab.net> a écrit :
> 
>     Next people will add incorrect manual casts to silence the errors
>     instead of fixing them properly. Not a good idea.
> 
>     Le 2 octobre 2019 13:14:14 GMT+03:00, Romain Vimont
>     <rom1v at videolabs.io> a écrit :
> 
>         ------------------------------------------------------------------------
>           configure.ac | 2 +-
>           1 file changed, 1 insertion(+), 1 deletion(-)
> 
>         diff --git a/configure.ac b/configure.ac
>         index 210b4ca537..2fa70daf22 100644
>         --- a/configure.ac
>         +++ b/configure.ac
>         @@ -988,7 +988,7 @@ dnl
>           AX_APPEND_COMPILE_FLAGS([-Wall -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wduplicated-branches -Wduplicated-cond], [CFLAGS])
>           AX_APPEND_COMPILE_FLAGS([-Wall -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wduplicated-branches -Wduplicated-cond], [CXXFLAGS])
>           
>         -AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -Wlogical-op -Wshadow=local -Wmultistatement-macros], [CFLAGS])
>         +AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -Wlogical-op -Wshadow=local -Wmultistatement-macros -Werror=incompatible-pointer-types], [CFLAGS])
>           AX_APPEND_COMPILE_FLAGS([-pipe], [CFLAGS])
>           
>           dnl
> 
> 
> -- 
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> ma brièveté.
> 
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