[BUG] Build With CMake and GCC as static library

[0x7a657573]

Describe the bug
I tried to add FreeRTOS on my CMake Project but in compile time I get some error like this:

[build] ../system/FreeRTOS/portable/GCC/ARM_CM3/portmacro.h:135:51: error: unknown type name 'inline'
[build] attribute( ( always_inline ) ) static inline uint8_t ucPortCountLeadingZeros( uint32_t ulBitmap )

I think this error happen because in the FreeRTOS, CMakelists.txt at line 296 say to compiler use C90 standard.
set_property(TARGET freertos_kernel PROPERTY C_STANDARD 90)
when I change this line to use GNU99 standard, error is gone !

Target

• Development board: [STM32F103CBT6]
• Instruction Set Architecture: [ARM Cortex-m3]
• IDE and version: [vscode]
• Toolchain and version: [GCC arm-none-eabi-8.3.1]

Host

• Host OS: [Linux]
• Version: [Debian 11.6]

[RichardBarry]

Grateful if you can create a support thread on this at https://forums.freertos.org until we determine the route cause as the kernel should build with C90, and GCC is happy with "inline". Thanks.

[0x7a657573]

I posted my Issue to forums.freertos.org