pow() might require the math library to be linked with
rtl-sdl (e.g. when compiling with clang), even though
it's actually constant.
---
src/rtl-sdr.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/src/rtl-sdr.c b/src/rtl-sdr.c
index 6a9539b..da79acb 100644
--- a/src/rtl-sdr.c
+++ b/src/rtl-sdr.c
@@ -675,6 +675,9 @@ int rtlsdr_set_tuner_gain_mode(rtlsdr_dev_t *dev, int mode)
return r;
}
+/* two raised to the power of n */
+#define TWO_POW(n) ((double)(1ULL<<(n)))
+
int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
{
uint16_t tmp;
@@ -688,10 +691,10 @@ int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
if (samp_rate > MAX_SAMP_RATE)
samp_rate = MAX_SAMP_RATE;
- rsamp_ratio = (dev->rtl_xtal * pow(2, 22)) / samp_rate;
+ rsamp_ratio = (dev->rtl_xtal * TWO_POW(22)) / samp_rate;
rsamp_ratio &= ~3;
- real_rate = (dev->rtl_xtal * pow(2, 22)) / rsamp_ratio;
+ real_rate = (dev->rtl_xtal * TWO_POW(22)) / rsamp_ratio;
if ( ((double)samp_rate) != real_rate )
fprintf(stderr, "Exact sample rate is: %f Hz\n", real_rate);
--
1.7.0.4
--dDRMvlgZJXvWKvBx
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
filename="0002-include-math.h-was-not-needed.patch"
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