Re: [Qemu-devel] [PATCH] build: compile gtk.c with special CFLAGS

[Anthony Liguori <aliguori@us.ibm.com>]

Blue Swirl <blauwirbel@gmail.com> writes:

> Compile gtk.c with special CFLAGS instead of disabling -Werror globally.
>
> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

I thought Kevin's pragma trick solved this problem?

Are you attempting to avoid disabling Werror when prgram isn't
available?  That seems to defeat the purpose of doing the pragma thing
to begin with.

Regards,

Anthony Liguori

> ---
>  configure        |   12 +++++++++++-
>  ui/Makefile.objs |    2 +-
>  2 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/configure b/configure
> index 19738ac..2a043d6 100755
> --- a/configure
> +++ b/configure
> @@ -3139,6 +3139,7 @@ fi
>  # the build doesn't fail anyway.
>  
>  pragma_disable_unused_but_set=no
> +gtk_special_cflags=no
>  cat > $TMPC << EOF
>  #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
>  #pragma GCC diagnostic ignored "-Wstrict-prototypes"
> @@ -3150,7 +3151,7 @@ EOF
>  if compile_prog "-Werror" "" ; then
>      pragma_diagnostic_available=yes
>  else
> -    werror=no
> +    gtk_special_cflags=yes
>  fi
>  
>  ########################################
> @@ -3845,6 +3846,15 @@ echo "WINDRES=$windres" >> $config_host_mak
>  echo "LIBTOOL=$libtool" >> $config_host_mak
>  echo "CFLAGS=$CFLAGS" >> $config_host_mak
>  echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
> +if test "$gtk_special_cflags" = "yes"; then
> +  # Our compiler doesn't support #pragmas to suppress warnings and GTK
> +  # can't be fixed, so compile GTK files with special CFLAGS
> +  echo "GTK_SPECIAL_CFLAGS=$QEMU_CFLAGS" | \
> +    sed -e 's/-Wstrict-prototypes//g' \
> +        -e 's/-Wunused-but-set-variable//g' >> $config_host_mak
> +else
> +  echo "GTK_SPECIAL_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
> +fi
>  echo "QEMU_INCLUDES=$QEMU_INCLUDES" >> $config_host_mak
>  if test "$sparse" = "yes" ; then
>    echo "CC           := REAL_CC=\"\$(CC)\" cgcc"       >> $config_host_mak
> diff --git a/ui/Makefile.objs b/ui/Makefile.objs
> index 6ddc0de..c9aa1e6 100644
> --- a/ui/Makefile.objs
> +++ b/ui/Makefile.objs
> @@ -19,4 +19,4 @@ $(obj)/sdl.o $(obj)/sdl_zoom.o: QEMU_CFLAGS += $(SDL_CFLAGS)
>  
>  $(obj)/cocoa.o: $(SRC_PATH)/$(obj)/cocoa.m
>  
> -$(obj)/gtk.o: QEMU_CFLAGS += $(GTK_CFLAGS) $(VTE_CFLAGS)
> +$(obj)/gtk.o: QEMU_CFLAGS = $(GTK_SPECIAL_CFLAGS) $(GTK_CFLAGS) $(VTE_CFLAGS)
> -- 
> 1.7.2.5