Jeff Chan created MYNEWT-688:
--------------------------------
Summary: error: ignoring return value of 'write', declared with
attribute warn_unused_result
Key: MYNEWT-688
URL: https://issues.apache.org/jira/browse/MYNEWT-688
Project: Mynewt
Issue Type: Bug
Components: HAL
Affects Versions: v1_0_0_beta1
Environment: OS X w/ newt docker container
Reporter: Jeff Chan
Assignee: Marko Kiiskila
Priority: Minor
Fix For: v1_0_0_rel
Compile fails for native sim target. Would love to help, but unsure what the
official way to ignore the return value is. GCC compile flag? Macro that uses
and discards the result?
Error: repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c: In function
'hal_uart_blocking_tx':
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:317:5: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
(void) write(uarts[port].u_fd, &data, sizeof(data));
^
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c: In function 'uart_pty':
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:267:9: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
write(1, msg, sizeof(msg));
^
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:276:5: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
write(1, msg, strlen(msg));
^
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c: In function
'uart_set_attr':
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:240:9: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
write(1, msg, sizeof(msg));
^
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:251:9: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
write(1, msg, sizeof(msg));
^
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c: In function
'set_nonblock':
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:223:9: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
write(1, msg, sizeof(msg));
^
repos/apache-mynewt-core/hw/mcu/native/src/hal_uart.c:228:9: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
write(1, msg, sizeof(msg));
^
Error: repos/apache-mynewt-core/hw/mcu/native/src/hal_system.c: In function
'usage':
repos/apache-mynewt-core/hw/mcu/native/src/hal_system.c:58:5: error: ignoring
return value of 'write', declared with attribute warn_unused_result
[-Werror=unused-result]
(void) write(2, msg, strlen(msg));
^
cc1: all warnings being treated as errors
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