8ddc9da39c
[Peter: fix exp10 breakage on uClibc] Signed-off-by: Chih-Min Chao <cmchao@gmail.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
34 lines
993 B
Diff
34 lines
993 B
Diff
From da14c5ab2a6e030c5c56c979b8eb3ca071890876 Mon Sep 17 00:00:00 2001
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From: Peter Korsgaard <jacmet@sunsite.dk>
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Date: Mon, 14 Mar 2011 09:19:18 +0100
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Subject: [PATCH] alsamixer: fix build on uClibc
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exp10 is a glibc extension, which isn't supported on uClibc. Luckily,
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exp10() is trivial to compute based on exp(), so add a wrapper for
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the uClibc case.
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Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
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---
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alsamixer/volume_mapping.c | 5 +++++
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1 files changed, 5 insertions(+), 0 deletions(-)
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diff --git a/alsamixer/volume_mapping.c b/alsamixer/volume_mapping.c
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index 9cacad8..1c0d7c4 100644
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--- a/alsamixer/volume_mapping.c
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+++ b/alsamixer/volume_mapping.c
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@@ -37,6 +37,11 @@
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#include <stdbool.h>
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#include "volume_mapping.h"
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+#ifdef __UCLIBC__
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+/* 10^x = 10^(log e^x) = (e^x)^log10 = e^(x * log 10) */
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+#define exp10(x) (exp((x) * log(10)))
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+#endif /* __UCLIBC__ */
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+
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#define MAX_LINEAR_DB_SCALE 24
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static inline bool use_linear_dB_scale(long dBmin, long dBmax)
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--
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1.7.2.3
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