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(automk14.info.gz) Program variables

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 7.5 Variables used when building a program
 ==========================================
 
 Occasionally it is useful to know which `Makefile' variables Automake
 uses for compilations; for instance you might need to do your own
 compilation in some special cases.
 
    Some variables are inherited from Autoconf; these are `CC',
 `CFLAGS', `CPPFLAGS', `DEFS', `LDFLAGS', and `LIBS'.  
 
    There are some additional variables which Automake itself defines:
 
 `INCLUDES'
      A list of `-I' options.  This can be set in your `Makefile.am' if
      you have special directories you want to look in.  Automake already
      provides some `-I' options automatically.  In particular it
      generates `-I$(srcdir)' and a `-I' pointing to the directory
      holding `config.h' (if you've used `AC_CONFIG_HEADER' or
      `AM_CONFIG_HEADER').
 
      `INCLUDES' can actually be used for other `cpp' options besides
      `-I'.  For instance, it is sometimes used to pass arbitrary `-D'
      options to the compiler.
 
 `COMPILE'
      This is the command used to actually compile a C source file.  The
      filename is appended to form the complete command line.
 
 `LINK'
      This is the command used to actually link a C program.
 
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