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AROS Application Development Manual -- Flags

Index

Preprocessor

Read-only

These defines can be checked within the source code to query various system aspects. Example:

#ifdef __AROS__
#warning "Yeah, we build for AROS"
#else
#warning "Sky is falling"
#endif
__AROS__
Check whether we build for AROS.
__i386__, __x86_64__, __mc68000__, __powerpc__, __arm__
On which CPU we are running.
AROS_BIG_ENDIAN
Is 0 on little endian and 1 on big endian systems.

There are many more which you can find in the "Developer/include/aros" directory.

Read/Write

Example usage in a mmakefile.src::
USER_CPPFLAGS := -DPOSIXC_NO_VAARGS
POSIXC_NO_VAARGS
Makes it use #define fwrite __posixc_fwrite instead of #define fwrite(...) __posixc_fwrite(__VA_ARG__).
POSIXC_NOINLINE_VAARGS
It's needed for c++ code. It prevents the defines and the inlines being used, and instead uses the c++ wrappers.
NO_POSIX_WRAPPERS
Prevents posixc using the wrappers at all and passes through to stdcio for symbol definitions.

Compiler flags

Example usage in a mmakefile.src::
USER_CFLAGS := -noposixc
-noposixc
Only use functions from stdc.library

Linker flags

Example usage in a mmakefile.src::
USER_LDFLAGS := -xxx
-nix
Enables unix style file name mangling. E.g. a path like /progdir/dir////file is converted to progdir:dir/file. Note that some build-system macros have a parameter for setting this.

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