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(autocf21.info.gz) Using System Type

Info Catalog (autocf21.info.gz) System Type Variables (autocf21.info.gz) Manual Configuration
 
 8.4 Using the System Type
 =========================
 
 How do you use a canonical system type?  Usually, you use it in one or
 more `case' statements in `configure.in' to select system-specific C
 files.  Then link those files, which have names based on the system
 name, to generic names, such as `host.h' or `target.c'.  The `case'
 statement patterns can use shell wildcards to group several cases
 together, like in this fragment:
 
      case "$target" in
      i386-*-mach* | i386-*-gnu*) obj_format=aout emulation=mach bfd_gas=yes ;;
      i960-*-bout) obj_format=bout ;;
      esac
 
  -- Macro: AC_LINK_FILES (SOURCE..., DEST...)
      Make `AC_OUTPUT' link each of the existing files SOURCE to the
      corresponding link name DEST.  Makes a symbolic link if possible,
      otherwise a hard link.  The DEST and SOURCE names should be
      relative to the top level source or build directory.  This macro
      may be called multiple times.
 
      For example, this call:
 
           AC_LINK_FILES(config/${machine}.h config/${obj_format}.h, host.h object.h)
 
      creates in the current directory `host.h', which is a link to
      `SRCDIR/config/${machine}.h', and `object.h', which is a link to
      `SRCDIR/config/${obj_format}.h'.
 
    You can also use the host system type to find cross-compilation
 tools.   Generic Programs, for information about the
 `AC_CHECK_TOOL' macro which does that.
 
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