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--- sound/sdlsound.c.orig 2007-04-27 23:18:27.000000000 +0200
+++ sound/sdlsound.c 2007-07-29 14:54:59.000000000 +0200
@@ -52,6 +52,15 @@
/* Records sound writer status information */
static int audio_output_started;
+/*
+ * log2() seems to be a Linuxism, define it here as it is absent in libm
+ */
+double
+log2(double x)
+{
+ return log(x)/log(2);
+}
+
int
sound_lowlevel_init( const char *device, int *freqptr, int *stereoptr )
{
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