Re: dlls/winmm/wineoss/audio.c build failure

[Gerald Pfeifer]

On Thu, 22 Jul 2004, Gerald Pfeifer wrote:
> The following change to dlls/winmm/wineoss/audio.c
>
> revision 1.135
>   date: 2004/07/19 20:08:06;  author: julliard;  state: Exp;  lines: +1 -1
>   Francois Gouget 
>   Use round() instead of ceil() in wodGetPosition(TIME_SMPTE).
>   Fixes the corresponding winmm conformance test.
>
> causes the following build failure on FreeBSD 4.9:
>
> ../../../tools/winegcc/winegcc -B../../../tools/winebuild -shared
>   ./wineoss.drv.spec    audio.o midi.o midipatch.o mixer.o mmaux.o oss.o
>   wineoss.drv.dbg.o   -o wineoss.drv.so -L../../../dlls  -lwinmm -luser32
>   -lkernel32 -L../../../libs/wine -lwine -ldxguid -luuid
>   -L../../../libs/port -lwine_port
>   audio.o: In function `wodGetPosition': /test/wine/dlls/winmm/wineoss/audio.c:2127:
>   undefined reference to `round'
>   collect2: ld returned 1 exit status
>   winegcc: /sw/gcc-3.3.2/bin/gcc failed.
>   gmake: *** [wineoss.drv.so] Error 2

...and here is why:

#define _GNU_SOURCE     /* for round() in math.h */

This is not precisely a clever idea, because it is obviously unportable!

The patch below addresses this; if we really need commercial rounding
here, we simply need to add 0.5 everywhere.

Gerald

ChangeLog:
Avoid using round(), which is unportable().
Index: dlls/dsound/mixer.c
===================================================================
RCS file: /home/wine/wine/dlls/dsound/mixer.c,v
retrieving revision 1.21
diff -u -3 -p -r1.21 mixer.c
--- dlls/dsound/mixer.c	23 Jul 2004 19:06:31 -0000	1.21
+++ dlls/dsound/mixer.c	24 Jul 2004 06:47:05 -0000
@@ -20,7 +20,6 @@
  */

#include "config.h"
-#define _GNU_SOURCE     /* for round() in math.h */
 #include <assert.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -85,17 +84,17 @@ void DSOUND_AmpFactorToVolPan(PDSVOLUMEP
         right=600 * log(((double)volpan->dwTotalRightAmpFactor) / 0xffff) / log(2);
     if (left<right)
     {
-        volpan->lVolume=round(right);
+        volpan->lVolume=right;
         volpan->dwVolAmpFactor=volpan->dwTotalRightAmpFactor;
     }
     else
     {
-        volpan->lVolume=round(left);
+        volpan->lVolume=left;
         volpan->dwVolAmpFactor=volpan->dwTotalLeftAmpFactor;
     }
     if (volpan->lVolume < -10000)
         volpan->lVolume=-10000;
-    volpan->lPan=round(right-left);
+    volpan->lPan=right-left;
     if (volpan->lPan < -10000)
         volpan->lPan=-10000;