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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.

This document was generated on January 25, 2014 using texi2html 5.0.

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