AROS Application Development Manual -- Flags

Inhalt

Preprocessor

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.

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.

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.