stm32f103c8t6 template project
use stm32cubeCLT and STM32 VS Code Extension build project.
this project depends on the make build system so you need to install cmake and vscode cmake tools extension.
config settings.json to add cross compilation toolchain path

    "STM32VSCodeExtension.cubeCLT.path": "<stm32cubeclt path>"

run STM32VSCodeExtension generate project folder
upload and add CMSIS core files to your project

<project folder>/Inc/stm32f10x.h
<project folder>/Inc/system_stm32f10x.h
<project folder>/Src/system_stm32f10x.c
<project folder>/Inc/core_cm3.h
<project folder>/Src/core_cm3.c

config your project folder/cmake/gcc-arm-none-eabi.cmake

set(TOOLCHAIN_PREFIX		<stm32cubeclt path>/GNU-tools-for-STM32/bin/arm-none-eabi-)

config your project folder/cmake/vscode_generated.cmake

set(sources_SRCS ${sources_SRCS}
	${CMAKE_CURRENT_SOURCE_DIR}/Src/main.c
	${CMAKE_CURRENT_SOURCE_DIR}/Src/core_cm3.c
	${CMAKE_CURRENT_SOURCE_DIR}/Src/system_stm32f10x.c
	${CMAKE_CURRENT_SOURCE_DIR}/Src/syscall.c
	${CMAKE_CURRENT_SOURCE_DIR}/Src/sysmem.c
	${CMAKE_CURRENT_SOURCE_DIR}/Startup/startup_stm32f103c8tx.s
)
set(include_c_DIRS ${include_c_DIRS}
	${CMAKE_CURRENT_SOURCE_DIR}/Inc
)

if cmake version not support toolchain(stm32cubeclt) you may need add the cmake parameter to settings.json

    "cmake.configureArgs": [
        "-DCMAKE_C_COMPILER=/opt/st/stm32cubeclt_1.15.1/GNU-tools-for-STM32/bin/arm-none-eabi-gcc",
        "-DCMAKE_CXX_COMPILER=/opt/st/stm32cubeclt_1.15.1/GNU-tools-for-STM32/bin/arm-none-eabi-g++"
    ]