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automake-1.16: Assembly Support

 
 8.13 Assembly Support
 =====================
 
 Automake includes some support for assembly code.  There are two forms
 of assembler files: normal (‘*.s’) and preprocessed by ‘CPP’ (‘*.S’ or
 ‘*.sx’).
 
    The variable ‘CCAS’ holds the name of the compiler used to build
 assembly code.  This compiler must work a bit like a C compiler; in
 particular it must accept ‘-c’ and ‘-o’.  The values of ‘CCASFLAGS’ and
 ‘AM_CCASFLAGS’ (or its per-target definition) is passed to the
 compilation.  For preprocessed files, ‘DEFS’, ‘DEFAULT_INCLUDES’,
 ‘INCLUDES’, ‘CPPFLAGS’ and ‘AM_CPPFLAGS’ are also used.
 
    The autoconf macro ‘AM_PROG_AS’ will define ‘CCAS’ and ‘CCASFLAGS’
 for you (unless they are already set, it simply sets ‘CCAS’ to the C
 compiler and ‘CCASFLAGS’ to the C compiler flags), but you are free to
 define these variables by other means.
 
    Only the suffixes ‘.s’, ‘.S’, and ‘.sx’ are recognized by ‘automake’
 as being files containing assembly code.
 

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