ARM Compiler toolchain v4.1 for µVision Using the Compiler

Getting started with the Compiler
3.3 Default compiler behavior
The default compiler configuration is determined by the filename extension, for example,
filename.c, filename.cpp, but the command-line options can override this.
The compiler startup language can be C or C++ and the instruction set can be ARM or Thumb.
When you compile multiple files with a single command, all files must be of the same type,
either C or C++. The compiler cannot switch the language based on the file extension. The
following example produces an error because the specified source files have different
languages:
armcc -c test1.c test2.cpp
If you specify files with conflicting file extensions you can force the compiler to compile both
files for C or for C++, regardless of file extension. For example:
armcc -c --cpp test1.c test2.cpp
Where an unrecognized extension begins with .c, for example, filename.cmd, an error message
is generated.
Support for processing PreCompiled Header (PCH) files is not available when you specify
multiple source files in a single compilation. If you request PCH processing and specify more
than one primary source file, the compiler issues an error message, and aborts the compilation.
armcc can in turn invoke armasm and armlink. For example, if your source code contains
embedded assembler, armasm is called. With regard to where armcc looks for the armasm and
armlink binaries, it first checks the same location as armcc. If not found, it then checks the PATH
locations for these binaries.
3.3.1 See also
Tasks
• Using stdin to input source code to the compiler on page 3-11.
Introducing the ARM Compiler toolchain:
• Using a text file to specify command-line options on page 2-20.
Concepts
• Order of compiler command-line options on page 3-10
• Filename suffixes recognized by the compiler on page 3-14
• Compiler output files on page 3-16
• Factors influencing how the compiler searches for header files on page 3-17
• Compiler search rules and the current place on page 3-19
• The ARMCCnnINC environment variable on page 3-20
• Compiler command-line options and search paths on page 3-18
• PreCompiled Header (PCH) files on page 4-29.
Introducing the ARM Compiler toolchain:
• Autocompletion of compilation tools command-line option on page 2-19
• TMP environment variable for temporary file directories on page 2-23.
Reference
• Compiler command-line syntax on page 3-3
• Compiler command-line options listed by group on page 3-4.
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