gcc: SEGGER_RTT_Conf.h:59:75: error: expected expression before ')' token : "=r" (SavedState)

eliotstock · Apr 24th 2016, 7:18pm

Hi,

I'm trying to build my firmware with the System View target sources included. This is for an ARM Cortex M0 and I'm using this version of gcc:

gcc-arm-none-eabi-4_9-2015q1

The build fails on compiling SEGGER_SYSVIEW.c as follows:

C Source Code

In file included from SEGGER_SYSVIEW_ConfDefaults.h:62:0,from SEGGER_SYSVIEW_Int.h:62,from SEGGER_SYSVIEW.c:133:SEGGER_SYSVIEW.c: In function '_APrintHost':SEGGER_RTT_Conf.h:59:75: error: expected expression before ')' token:"=r" (SavedState) \

Here's the inline assembler source that's causing the error:

C Source Code

#define SEGGER_RTT_LOCK(SavedState) {\asm volatile ("mrs %0, primask \n\t" \"mov r1, $1 \n\t" \"msr primask, r1 \n\t" \: "=r" (SavedState) \: \: "r1"\ );\ }

How do I fix this?

SEGGER - Johannes · Apr 28th 2016, 7:15pm

Hi,

Could you update your SystemView and RTT sources to the latest version which is included in SystemView?

Best regards
Johannes

eliotstock · May 9th 2016, 11:55pm

Thanks, I see the issue. I had some of your code in my project from an earlier release already, and had only updated the other code.

SEGGER - Johannes · May 12th 2016, 11:35am

Thanks for the feedback, good to read it is working now.

Regards
Johannes

C Source Code

C Source Code

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