Include files from system-wide gcc used, but not the ones shipped with sw4stm32. How to fix?
“Fixed” the problem. Question now is: how to prevent sw4stm32 from using the wrong include paths? See EDIT 2 at the bottom.
I am just starting to explore sw4stm32 2.6, which is available from the Arch Linux AUR. I have imported an Amazon FreeRTOS demo, and cannot get it to build, because of the following error:
Description Resource Path Location Type fatal error: stdint.h: No such file or directory aws_demos line 9, external location: /usr/lib/gcc/arm-none-eabi/8.2.0/include/stdint.h C/C++ Problem
Now, this location does not actually correspond to the gcc shipped with sw4stm32, but to the one I have installed system wide. The gcc shipped with sw4stm32 is located at $ECLIPSE_HOME/plugins/fr.ac6.mcu.externaltools.arm-none.linux64_1.16.0.201807130628/tools/st-gnu-arm-gcc-7-2017-q4-major_gdb-5_4-2016q3/bin, which is also part of the $PATH defined at Properties > C/C++ Build > Environment.
As you can see in the screenshot below, sw4stm32 considers /usr/arm-none-eabi/include, /usr/lib/arm-none-eabi/8.2.0/include, and /usr/lib/arm-none-eabi/8.2.0/include-fixed as include paths, but not those at /usr/lib/sw4stm32/plugins/fr.ac6.mcu.externaltools.arm-none.linux64_1.16.0.201807130628/tools/st-gnu-arm-gcc-7-2017-q4-major_gdb-5_4-2016q3/lib/gcc/arm-none-eabi/7.2.1/include or /usr/lib/sw4stm32/plugins/fr.ac6.mcu.externaltools.arm-none.linux64_1.16.0.201807130628/tools/st-gnu-arm-gcc-7-2017-q4-major_gdb-5_4-2016q3/lib/gcc/arm-none-eabi/7.2.1/include-fixed, respectively.
So how does sw4stm32 determine that it should use one path but not the other for finding include files? I did not find a setting that explicitly lists those paths that do get included. Properties > C/C++ General > Paths and Symbols only lists Include Directories related to the env var $ProjName.
Where should I specify that it should look for those include files that were distributed with sw4stm32?
EDIT: I believe I found the setting containing the incorrect includes. In Properties > C/C++ General > Proprocesser Include under Languages/GNU C, I can see the settings entry Ac6 SW4 STM32 MCU Built-in Compiler Settings, with /usr/arm-none-eabi/include, /usr/lib/arm-none-eabi/8.2.0/include, and /usr/lib/arm-none-eabi/8.2.0/include-fixed.
It further says that Settings entries for this provider are supplied by the system and are not editable. That’s very curious.
EDIT 2: I have uninstalled my system-wide versions of the ARM GCC compiler suites. When restarting sw4stm32, it now correctly displays the correct include paths distributed with sw4stm32.
Why then did it choose the wrong paths?
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