IAR Environment Variables in CMake

Introduction

The IAR Embedded Workbench IDE classic project format (*.ewp) provides internal environment variables such as for "Project directory" ($PROJ_DIR$) or for "Product directory" ($TOOLKIT_DIR$). These are called "Argument Variables" and they are not automatically propagated to CMake projects.

Helpful Resources

• IAR Argument Variables
• CMAKE_<lang>_COMPILER
• PROJECT_NAME
• PROJECT_SOURCE_DIR
• cmake_path()
• set()

Description

In your CMakeLists.txt use the following CMake commands after project() to get the corresponding IAR IDE Argument Variables counterparts, assuming that the project is using the C language:

# Get the IAR IDE Argument Variables in CMake
cmake_path(GET CMAKE_C_COMPILER PARENT_PATH COMPILER_DIR)
cmake_path(GET COMPILER_DIR PARENT_PATH TOOLKIT_DIR)
cmake_path(GET TOOLKIT_DIR PARENT_PATH EW_DIR)
set(PROJ_DIR "${PROJECT_SOURCE_DIR}")
set(PROJ_FNAME ${PROJECT_NAME})

Note

Referencing CMake Variables differs syntactically from referencing IAR Argument Variables:

IAR Argument Variable	CMake Variable
$VARIABLE_NAME$	${VARIABLE_NAME}

Example

• Now you can use these variables to reference those paths and resources in your CMake project. For example:

project(MyProject C ASM)
# ...
# Get the IAR IDE Argument Variables in CMake
# ...
target_link_options(MyTarget1 PRIVATE --semihosting --config ${TOOLKIT_DIR}/config/generic.icf)
# ...
target_link_options(MyTarget2 PRIVATE --semihosting --config ${PROJ_DIR}/${PROJ_FNAME}.icf)

Summary

It is possible to render almost any desired IAR Argument Variables in a CMake project so that its environment becomes more familiar.