ARMCC: How to Create Assembly Files From C Files

Information in this knowledgebase article applies to:

• Keil MDK v. 3.20 and later
• Keil µVision IDE v. 3.6 and later
• Keil RL-ARM middleware libraries v. 3.21 and later
• ARM Compiler 5 (Armcc) v. 5.02 (build 28) and later
• ARM Compiler 6 (Armclang) v. 6.4 and later

QUESTION

How do I create an assembler file from my C source file?

ANSWER

Use the --asm control to create assembler output from the C compiler. The --asm control causes the compiler to generate a .S file with the same name as your C file. You may then assemble the .S file with the assembler.

The --asm control is entered in µVision under Project - Options - C/C++ tab, Misc Controls. Also, disable the option Project - Listing - C Compiler Listing since this uses a different output.

The Assembly file will have a .ASM extension, and will be in your listing file folder for your project.

SEE ALSO

• GENERAL: How to Create Assembly Files from C Files

Last Reviewed: Wednesday, February 24, 2021