Package: libglib2.0-dev
Version: 2.24.2-1
Severity: important
When building gnash, some compiler warning like this show up when
building in Squeeze:
gst/VideoInputGst.cpp:492: warning: cast from type 'const GValue*'
to type 'GValue*' casts away constness
A complete list of warnings can be seen in <URL:
http://gnashdev.org:8010/builders/squeeze-linux-x86/builds/15/steps/compile/logs/warnings%20(332)
>.
To reproduce this, compile this source with lots of warning enabled:
% cat x.c
#include <gst/gst.h>
int main(int argc, char *argv[]) {
{
const GValue *framerates;
if (GST_VALUE_HOLDS_FRACTION(framerates))
return 1;
return 0;
}
% gcc -W -Wall -Wcast-align -Wcast-qual -Wpointer-arith \
-Wreturn-type -Wmissing-declarations -Wmissing-prototypes \
-Wstrict-prototypes $(pkg-config --cflags --libs gstreamer-0.10) \
-c x.c
The cause is this code in /usr/include/glib-2.0/gobject/gtype.h:
#define _G_TYPE_CVH(vl, gt) (g_type_check_value_holds ((GValue*) vl, gt))
It is throwing away the constness of the vl argument. Given that it
only read the value content, it would be better if it cast to (const
GValue *) instead.
Setting severity to important, as this problem make it hard to find
the warnings in the gnash code.
Happy hacking,
--
Petter Reinholdtsen
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