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Other things Automake recognizes
================================

   Automake will also recognize the use of certain macros and tailor the
generated `Makefile.in' appropriately.  Currently recognized macros and
their effects are:

`AC_CONFIG_HEADER'
     Automake requires the use of `AM_CONFIG_HEADER', which is similar
     to `AC_CONFIG_HEADER' (*note Configuration Header Files:
     (autoconf)Configuration Headers.), but does some useful
     Automake-specific work.

`AC_CONFIG_AUX_DIR'
     Automake will look for various helper scripts, such as
     `mkinstalldirs', in the directory named in this macro invocation.
     If not seen, the scripts are looked for in their `standard'
     locations (either the top source directory, or in the source
     directory corresponding to the current `Makefile.am', whichever is
     appropriate).  Note: Finding `configure' Input.
     FIXME: give complete list of things looked for in this directory

`AC_PATH_XTRA'
     Automake will insert definitions for the variables defined by
     `AC_PATH_XTRA' into each `Makefile.in' that builds a C program or
     library.  Note: System Services.

`AC_CANONICAL_HOST'
`AC_CHECK_TOOL'
     Automake will ensure that `config.guess' and `config.sub' exist.
     Also, the `Makefile' variables `host_alias' and `host_triplet' are
     introduced.  See both *Note Getting the Canonical System Type:
     (autoconf)Canonicalizing, and *Note Generic Program Checks:
     (autoconf)Generic Programs.

`AC_CANONICAL_SYSTEM'
     This is similar to `AC_CANONICAL_HOST', but also defines the
     `Makefile' variables `build_alias' and `target_alias'.  Note:
     Getting the Canonical System Type.

`AC_FUNC_ALLOCA'
`AC_FUNC_GETLOADAVG'
`AC_FUNC_MEMCMP'
`AC_STRUCT_ST_BLOCKS'
`AC_FUNC_FNMATCH'
`AM_FUNC_STRTOD'
`AC_REPLACE_FUNCS'
`AC_REPLACE_GNU_GETOPT'
`AM_WITH_REGEX'
     Automake will ensure that the appropriate dependencies are
     generated for the objects corresponding to these macros.  Also,
     Automake will verify that the appropriate source files are part of
     the distribution.  Note that Automake does not come with any of
     the C sources required to use these macros, so `automake -a' will
     not install the sources.  Note: A Library, for more information.
     Also, see Note: Particular Function Checks.


`LIBOBJS'
     Automake will detect statements which put `.o' files into
     `LIBOBJS', and will treat these additional files as if they were
     discovered via `AC_REPLACE_FUNCS'.  *Note Generic Function Checks:
     (autoconf)Generic Functions.

`AC_PROG_RANLIB'
     This is required if any libraries are built in the package.  Note:
     Particular Program Checks.

`AC_PROG_CXX'
     This is required if any C++ source is included.  Note: Particular
     Program Checks.

`AC_PROG_F77'
     This is required if any Fortran 77 source is included.  This macro
     is distributed with Autoconf version 2.13 and later.  Note:
     Particular Program Checks.

`AC_F77_LIBRARY_LDFLAGS'
     This is required for programs and shared libraries that are a
     mixture of languages that include Fortran 77 (Note: Mixing Fortran
     77 With C and C++).  Note: Autoconf macros supplied with
     Automake.

`AM_PROG_LIBTOOL'
     Automake will turn on processing for `libtool' (Note:
     Introduction.).

`AC_PROG_YACC'
     If a Yacc source file is seen, then you must either use this macro
     or define the variable `YACC' in `configure.in'.  The former is
     preferred (Note: Particular Program Checks.
).

`AC_DECL_YYTEXT'
     This macro is required if there is Lex source in the package.
     Note: Particular Program Checks.

`AC_PROG_LEX'
     If a Lex source file is seen, then this macro must be used.  Note:
     Particular Program Checks.

`ALL_LINGUAS'
     If Automake sees that this variable is set in `configure.in', it
     will check the `po' directory to ensure that all the named `.po'
     files exist, and that all the `.po' files that exist are named.

`AM_C_PROTOTYPES'
     This is required when using automatic de-ANSI-fication; see Note:
     ANSI.

`AM_GNU_GETTEXT'
     This macro is required for packages which use GNU gettext (Note:
     gettext).  It is distributed with gettext.  If Automake sees
     this macro it ensures that the package meets some of gettext's
     requirements.

`AM_MAINTAINER_MODE'
     This macro adds a `--enable-maintainer-mode' option to
     `configure'.  If this is used, `automake' will cause
     `maintainer-only' rules to be turned off by default in the
     generated `Makefile.in's.  This macro is disallowed in `Gnits'
     mode (Note: Gnits).  This macro defines the `MAINTAINER_MODE'
     conditional, which you can use in your own `Makefile.am'.

`AC_SUBST'
`AC_CHECK_TOOL'
`AC_CHECK_PROG'
`AC_CHECK_PROGS'
`AC_PATH_PROG'
`AC_PATH_PROGS'
     For each of these macros, the first argument is automatically
     defined as a variable in each generated `Makefile.in'.  Note:
     Setting Output Variables, and
     Note: Generic Program Checks.