E.1 Obsolete config.status Invocation

config.status now supports arguments to specify the files to instantiate; see 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 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.)