On 15/02/16 23:46 +0900, Mamoru TASAKA wrote:
Richard Shaw wrote on 02/15/2016 11:34 PM:
Can someone point me in the right direction? My package openCOLLADA is
FTBFS in rawhide with the following (repeating) error:
/builddir/build/BUILD/OpenCOLLADA-3335ac164e68b2512a40914b14c74db260e6ff7d/COLLADABaseUtils/src/COLLADABUURI.cpp:57:2:
error: narrowing conversion of '-1' from 'int' to 'char' inside { }
[-Wnarrowing]
};
I tried using the gcc6 porting guide but I'm not qutie enough of a
programmer to understand how to apply it in this case. The offending code
is:
const char HEX2DEC[256] = ^M
{^M
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F
*/^M
/* 0 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1,^M
/* 1 */ -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
<snip>
On _ARM_ (actually build failure seems to be on ARM) char is _unsigned_
by default, so converting (int)-1 to char on ARM is narrowing conversion
and C++11 forbids this on list-initialization.
You can do this when you explicitly cast, like
const char HEX2DEC[256] = { (char)-1, ..... }
Given that there are dozens of those initializers it might be more
readable to do:
static const char none = -1;
const char HEX2DEC[256] = { none, none, none, ..... }
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