7.153 --signed_chars, --unsigned_chars

Makes the char type signed or unsigned.

When char is signed, the macro __FEATURE_SIGNED_CHAR is also defined by the compiler.

Note

  • Care must be taken when mixing translation units that have been compiled with and without this option, and that share interfaces or data structures.
  • The ARM ABI defines char as an unsigned byte, and this is the interpretation used by the C++ libraries.

Default

The default is --unsigned_chars.
Related reference
9.152 Predefined macros
Non-ConfidentialPDF file icon PDF versionARM DUI0375F
Copyright © 2007, 2008, 2011, 2012, 2014 ARM. All rights reserved.