Does not work with Qt Creator 4.x

[n6hpa]

Hi There,

I am trying to get this running with Qt Creator 4.3. I was able to get this working with older versions of Qt Creator, but with 4.3 I get the following linker error:

helloworld-stm32f4-Debug/qtc_stm32f4_b337530f-debug/Hello-World-.qtc-stm32f4-b337530f.b023bda8/.obj/e64ca3ddddfee403/stm32f4xx_tim.c.o /Users/n6hpa/dev/build-helloworld-stm32f4-Debug/qtc_stm32f4_b337530f-debug/Hello-World-.qtc-stm32f4-b337530f.b023bda8/.obj/e64ca3ddddfee403/stm32f4xx_usart.c.o /Users/n6hpa/dev/build-helloworld-stm32f4-Debug/qtc_stm32f4_b337530f-debug/Hello-World-.qtc-stm32f4-b337530f.b023bda8/.obj/e64ca3ddddfee403/stm32f4xx_wwdg.c.o
/Users/n6hpa/gcc-arm-none-eabi-5_4-2016q3/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/bin/ld: unrecognised emulation mode: thumb
Supported emulations: armelf
collect2: error: ld returned 1 exit status

Any idea what is causing this? Google has failed me so far...

[nlhans]

I could not reproduce this at first because I was using older versions on Ubuntu LTS. Recently I've upgraded and I was able to reproduce.

It turns out later versions of QBS is escaping linker commands al the time. This meant that information about chip architectures was not given correctly.
The fix is to use driverFlags instead.
cpp.driverFlags: [ "-mcpu=cortex-m4", "-mfloat-abi=hard", "-mfpu=fpv4-sp-d16", "-mthumb" ]

You can place this in the Qbs file nearby the linkerFlags definition. Then remove these definitions from the linkerFlags as they are redundant. I'm still investigating if I can streamline more of the QBS by this, because I believe driverFlags is given to any compiler command.