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Fix minor warning w/Ubuntu18.04 in host test build (#5829)

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GCC reports the following warning about ignoring the return value of
write() (to the console/UART in this instance).

common/MockUART.cpp: In function ‘void uart_do_write_char(int, char)’:
common/MockUART.cpp:67:8: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
   write(uart_nr + 1, &c, 1);
   ~~~~~^~~~~~~~~~~~~~~~~~~~

Add a simple warning printout to STDERR which may not be the same as the
UART stream and could succeed.
This commit is contained in:
Earle F. Philhower, III 2019-03-02 17:37:03 +00:00 committed by Develo
parent 418857aae7
commit 82da5c76b9
1 changed files with 2 additions and 1 deletions
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3
tests/host/common/MockUART.cpp
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@ -64,7 +64,8 @@ static void
uart_do_write_char(const int uart_nr, char c) uart_do_write_char(const int uart_nr, char c)
{ {
if (uart_nr >= UART0 && uart_nr <= UART1) if (uart_nr >= UART0 && uart_nr <= UART1)
write(uart_nr + 1, &c, 1); if (1 != write(uart_nr + 1, &c, 1))
fprintf(stderr, "Unable to write character to emulated UART stream: %d\n", c);
} }
// write a new byte into the RX FIFO buffer // write a new byte into the RX FIFO buffer