52 lines
1.9 KiB
Diff
52 lines
1.9 KiB
Diff
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From 8faa5c2fb2b04b4fb062255aa807abafc50bff66 Mon Sep 17 00:00:00 2001
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From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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Date: Sat, 3 Apr 2021 10:27:20 +0200
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Subject: [PATCH] ws2811.c: fix build with gcc 4.8
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Fix the following build failure with gcc 4.8 (which has been added by
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commit 391f6e856d28510bd9ae4efd3a166da7f73613ab):
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lib/ws2811.c: In function 'ws2811_set_custom_gamma_factor':
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lib/ws2811.c:1289:5: error: 'for' loop initial declarations are only allowed in C99 mode
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for (int chan = 0; chan < RPI_PWM_CHANNELS; chan++)
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^
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lib/ws2811.c:1289:5: note: use option -std=c99 or -std=gnu99 to compile your code
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lib/ws2811.c:1295:11: error: 'for' loop initial declarations are only allowed in C99 mode
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for(int counter = 0; counter < 256; counter++)
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^
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Fixes:
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- http://autobuild.buildroot.org/results/3d037922484bfc45d0f985f87b38f20c5a4ab064
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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[Retrieved from:
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https://github.com/jgarff/rpi_ws281x/commit/0814bae544f0184ab1600bc2660486874eef5970]
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---
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ws2811.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/ws2811.c b/ws2811.c
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index f5cdebd..6482796 100644
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--- a/lib/ws2811.c
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+++ b/lib/ws2811.c
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@@ -1286,13 +1286,14 @@ const char * ws2811_get_return_t_str(const ws2811_return_t state)
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void ws2811_set_custom_gamma_factor(ws2811_t *ws2811, double gamma_factor)
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{
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- for (int chan = 0; chan < RPI_PWM_CHANNELS; chan++)
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+ int chan, counter;
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+ for (chan = 0; chan < RPI_PWM_CHANNELS; chan++)
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{
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ws2811_channel_t *channel = &ws2811->channel[chan];
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if (channel->gamma)
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{
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- for(int counter = 0; counter < 256; counter++)
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+ for(counter = 0; counter < 256; counter++)
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{
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channel->gamma[counter] = (gamma_factor > 0)? (int)(pow((float)counter / (float)255.00, gamma_factor) * 255.00 + 0.5) : counter;
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--
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2.30.2
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