[LLVMdev] [brlcad-devel] Clang vs. gcc for building BRL-CAD

[Tom Browder]

On Sat, Aug 17, 2013 at 10:50 AM, Tom Browder <tom.browder at gmail.com> wrote:

> Attached is a list of the gcc-4.8.1 warnings from a trunk rev 56916 build
> (made into errors) that, for some reason, don't show in a debug build
> (looks like compile flags may be different but I'm not sure at the
> moment--need to dig into BRL-CAD CMake environment some more).
>
> They look like legit problems but I haven't tried to fix them.
>
>
Now the file is attached!

-Tom
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/disk3/extsrc/brlcad-svn-trunk/src/libfb/if_X24.c: In function 'x24_setup':
/disk3/extsrc/brlcad-svn-trunk/src/libfb/if_X24.c:954:22: error: iteration 219u invokes undefined behavior [-Werror=aggressive-loop-optimizations]
       glumtbl[i] = i * 9848226;
                      ^
/disk3/extsrc/brlcad-svn-trunk/src/libfb/if_X24.c:952:3: note: containing loop
   for (i = 0; i < 256; i++) {
   ^

[ 68%] /disk3/extsrc/brlcad-svn-trunk/src/libbn/tests/bn_poly_synthetic_div.c:52:21: error: array subscript is above array bounds [-Werror=array-bounds]
     quo[0].dgr = rem[1].dgr = 4;
                     ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c: In function 'rt_nurb_region_from_srf':
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c:303:14: error: array subscript is above array bounds [-Werror=array-bounds]
      knot_vec[i+srf->order[0]] = param2;
              ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c:310:14: error: array subscript is above array bounds [-Werror=array-bounds]
      knot_vec[i+srf->order[1]] = param2;

In file included from /disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bot/bot_oriented_bbox.cpp:30:0:
/disk3/extsrc/brlcad-svn-trunk/src/other/libgdiam/gdiam.hpp: In function 'void pnt_normalize(gdiam_point)':
/disk3/extsrc/brlcad-svn-trunk/src/other/libgdiam/gdiam.hpp:73:18: warning: comparing floating point with == or != is unsafe [-Wfloat-equal]
     if  ( len == 0.0 )
                  ^
/disk3/extsrc/brlcad-svn-trunk/src/other/libgdiam/gdiam.hpp: In function 'bool pnt_isEqual(gdiam_point, gdiam_point)':
/disk3/extsrc/brlcad-svn-trunk/src/other/libgdiam/gdiam.hpp:176:32: warning: comparing floating point with == or != is unsafe [-Wfloat-equal]
     return  ( ( p[ 0 ] == q[ 0 ] )
                                ^
/disk3/extsrc/brlcad-svn-trunk/src/other/libgdiam/gdiam.hpp:177:36: warning: comparing floating point with == or != is unsafe [-Wfloat-equal]
               &&  ( p[ 1 ] == q[ 1 ] )
                                    ^
/disk3/extsrc/brlcad-svn-trunk/src/other/libgdiam/gdiam.hpp:178:36: warning: comparing floating point with == or != is unsafe [-Wfloat-equal]
               &&  ( p[ 2 ] == q[ 2 ] ) );

                                    ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c: In function 'rt_nurb_region_from_srf':
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c:303:14: error: array subscript is above array bounds [-Werror=array-bounds]
      knot_vec[i+srf->order[0]] = param2;
              ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c:310:14: error: array subscript is above array bounds [-Werror=array-bounds]
      knot_vec[i+srf->order[1]] = param2;
              ^
[ 73%] /disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c: In function 'rt_nurb_intersect':
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c:303:14: error: array subscript is above array bounds [-Werror=array-bounds]
      knot_vec[i+srf->order[0]] = param2;
              ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/bspline/nurb_ray.c:310:14: error: array subscript is above array bounds [-Werror=array-bounds]
      knot_vec[i+srf->order[1]] = param2;

/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1184:9: error: 'seg_in.hit_vpriv[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     dlog("add_seg %g %g line %d vpriv:%g %g\n", in_hit->hit_dist, out_hit->hit_dist, line, in_hit->hit_vpriv[X], in_hit->hit_vpriv[Y]);
         ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:13: note: 'seg_in.hit_vpriv[0]' was declared here
  struct hit seg_in, seg_out;
             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1184:9: error: 'seg_in.hit_vpriv[1]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     dlog("add_seg %g %g line %d vpriv:%g %g\n", in_hit->hit_dist, out_hit->hit_dist, line, in_hit->hit_vpriv[X], in_hit->hit_vpriv[Y]);
         ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:13: note: 'seg_in.hit_vpriv[1]' was declared here
  struct hit seg_in, seg_out;
             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1200:29: error: 'seg_out.hit_vpriv[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   seg->seg_out.hit_vpriv[X] = out_hit->hit_vpriv[X];
                             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:21: note: 'seg_out.hit_vpriv[0]' was declared here
  struct hit seg_in, seg_out;
                     ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1201:29: error: 'seg_out.hit_vpriv[1]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   seg->seg_out.hit_vpriv[Y] = out_hit->hit_vpriv[Y];
                             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:21: note: 'seg_out.hit_vpriv[1]' was declared here
  struct hit seg_in, seg_out;
                     ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c: In function 'rt_dsp_shot':
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1184:9: error: 'seg_in.hit_vpriv[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     dlog("add_seg %g %g line %d vpriv:%g %g\n", in_hit->hit_dist, out_hit->hit_dist, line, in_hit->hit_vpriv[X], in_hit->hit_vpriv[Y]);
         ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:13: note: 'seg_in.hit_vpriv[0]' was declared here
  struct hit seg_in, seg_out;
             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1184:9: error: 'seg_in.hit_vpriv[1]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     dlog("add_seg %g %g line %d vpriv:%g %g\n", in_hit->hit_dist, out_hit->hit_dist, line, in_hit->hit_vpriv[X], in_hit->hit_vpriv[Y]);
         ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:13: note: 'seg_in.hit_vpriv[1]' was declared here
  struct hit seg_in, seg_out;
             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1200:29: error: 'seg_out.hit_vpriv[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   seg->seg_out.hit_vpriv[X] = out_hit->hit_vpriv[X];
                             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:21: note: 'seg_out.hit_vpriv[0]' was declared here
  struct hit seg_in, seg_out;
                     ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:1201:29: error: 'seg_out.hit_vpriv[1]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   seg->seg_out.hit_vpriv[Y] = out_hit->hit_vpriv[Y];
                             ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/dsp/dsp.c:2468:21: note: 'seg_out.hit_vpriv[1]' was declared here
  struct hit seg_in, seg_out;
                     ^
In file included from /disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_misc.c:37:0:
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_misc.c: In function 'nmg_snurb_calc_lu_uv_orient':
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_misc.c:128:42: error: array subscript is below array bounds [-Werror=array-bounds]
       VSCALE(pts[edge_no], crv_pt, crv_pt[coords-1]);
                                          ^
/disk3/extsrc/brlcad-svn-trunk/include/vmath.h:993:21: note: in definition of macro 'VSCALE'
  (a)[X] = (b)[X] * (c); \
                     ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_misc.c:128:42: error: array subscript is below array bounds [-Werror=array-bounds]
       VSCALE(pts[edge_no], crv_pt, crv_pt[coords-1]);
                                          ^
/disk3/extsrc/brlcad-svn-trunk/include/vmath.h:994:21: note: in definition of macro 'VSCALE'
  (a)[Y] = (b)[Y] * (c); \
                     ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_misc.c:128:42: error: array subscript is below array bounds [-Werror=array-bounds]
       VSCALE(pts[edge_no], crv_pt, crv_pt[coords-1]);
                                          ^
/disk3/extsrc/brlcad-svn-trunk/include/vmath.h:995:21: note: in definition of macro 'VSCALE'
  (a)[Z] = (b)[Z] * (c); \

/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c: In function 'isect_ray_snurb_face':
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
    ctl_pt[i][j] = ctl_pt[i][j]/ctl_pt[i][coords-1];
                                         ^
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]
/disk3/extsrc/brlcad-svn-trunk/src/librt/primitives/nmg/nmg_rt_isect.c:1867:41: error: array subscript is above array bounds [-Werror=array-bounds]