File: autoconf.info,  Node: Obsolete config.status Use,  Next: acconfig Header,  Up: Obsolete Constructs

18.1 Obsolete ‘config.status’ Invocation
========================================

‘config.status’ now supports arguments to specify the files to
instantiate; see *note config.status Invocation::, for more details.
Before, environment variables had to be used.

 -- Variable: CONFIG_COMMANDS
     The tags of the commands to execute.  The default is the arguments
     given to ‘AC_OUTPUT’ and ‘AC_CONFIG_COMMANDS’ in ‘configure.ac’.

 -- Variable: CONFIG_FILES
     The files in which to perform ‘@VARIABLE@’ substitutions.  The
     default is the arguments given to ‘AC_OUTPUT’ and ‘AC_CONFIG_FILES’
     in ‘configure.ac’.

 -- Variable: CONFIG_HEADERS
     The files in which to substitute C ‘#define’ statements.  The
     default is the arguments given to ‘AC_CONFIG_HEADERS’; if that
     macro was not called, ‘config.status’ ignores this variable.

 -- Variable: CONFIG_LINKS
     The symbolic links to establish.  The default is the arguments
     given to ‘AC_CONFIG_LINKS’; if that macro was not called,
     ‘config.status’ ignores this variable.

   In *note config.status Invocation::, using this old interface, the
example would be:

     config.h: stamp-h
     stamp-h: config.h.in config.status
             CONFIG_COMMANDS= CONFIG_LINKS= CONFIG_FILES= \
               CONFIG_HEADERS=config.h ./config.status
             echo > stamp-h

     Makefile: Makefile.in config.status
             CONFIG_COMMANDS= CONFIG_LINKS= CONFIG_HEADERS= \
               CONFIG_FILES=Makefile ./config.status

(If ‘configure.ac’ does not call ‘AC_CONFIG_HEADERS’, there is no need
to set ‘CONFIG_HEADERS’ in the ‘make’ rules.  Equally for
‘CONFIG_COMMANDS’, etc.)