Tony wrote:
> In GTK builds (here GTK3):
>
> gcc -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_GTK -pthread
> -I/usr/include/gtk-3.0 -I/usr/include/at-spi2-atk/2.0
> -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0
> -I/usr/lib64/dbus-1.0/include -I/usr/include/gtk-3.0
> -I/usr/include/gio-unix-2.0 -I/usr/include/libxkbcommon
> -I/usr/include/wayland -I/usr/include/cairo -I/usr/include/pango-1.0
> -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/atk-1.0
> -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2
> -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0
> -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glib-2.0
> -I/usr/lib64/glib-2.0/include -O2 -fno-strength-reduce -Wall
> -Wno-deprecated-declarations -D_REENTRANT -U_FORTIFY_SOURCE
> -D_FORTIFY_SOURCE=1 -o objects/gui_gtk_x11.o gui_gtk_x11.c
> gui_gtk_x11.c: In function ‘gui_gtk2_draw_string’:
> gui_gtk_x11.c:5749:13: warning: ‘should_need_pango’ may be used
> uninitialized in this function [-Wmaybe-uninitialized]
> len_sum += gui_gtk2_draw_string_ext(row, col + len_sum,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> cs, slen, flags, needs_pango);
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The error is confusing, because it is at the line where needs_pango is
used. But needs_pango got the value of should_need_pango further down,
apparently the not-initialized mark is transfered between the variables.
Gcc doesn't know that the while is always making at least one loop.
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