Macro: ac_prefix_config_h

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Synopsis

  `AC_PREFIX_CONFIG_H [(PREFIX [,ORIG-HEADER [,OUTPUT-HEADER]])]`

Version

  1.1.1.1 (2001/07/26) guidod @ ac-archive-0.5.39

Author

  Guido Draheim <guidod@gmx.de>

Description

  obsoleted by AX_PREFIX_CONFIG_H

  takes the usual config.h generated header file; looks for each of the generated "#define SOMEDEF" lines, and prefixes the defined name (ie. makes it "#define PREFIX_SOMEDEF". The result is written to the output config.header file. The PREFIX is converted to uppercase for the conversions. If PREFIX is absent, $PACKAGE will be assumed. If the ORIG-HEADER is absent, "config.h" will be assumed. If the OUTPUT-HEADER is absent, "PREFIX-config.h" will be assumed.

  In most cases, the configure.in will contain a line saying
  `AC_CONFIG_HEADER(config.h)`
  somewhere *before* AC_OUTPUT and a simple line saying
  `AC_PREFIX_CONFIG_HEADER`
  somewhere *after* AC_OUTPUT.

  example:
  `AC_INIT(config.h.in) # config.h.in as created by "autoheader"`
  `AM_INIT_AUTOMAKE(testpkg, 0.1.1) # "#undef VERSION" and "PACKAGE"`
  `AM_CONFIG_HEADER(config.h) # in config.h.in`
  `AC_MEMORY_H # "#undef NEED_MEMORY_H"`
  `AC_C_CONST_H # "#undef const"`
  `AC_OUTPUT(Makefile) # creates the "config.h" now`
  `AC_PREFIX_CONFIG_H # creates "testpkg-config.h"`
  `and the resulting "testpkg-config.h" contains lines like`
  `#define TESTPKG_VERSION "0.1.1"`
  `#define TESTPKG_NEED_MEMORY_H 1`
  `#define TESTPKG_const const`

  `and this "testpkg-config.h" can be installed along with other`
  `header-files, which is most convenient when creating a shared`
  `library (that has some headers) where some functionality is`
  `dependent on the OS-features detected at compile-time. No`
  `need to invent some "testpkg-confdefs.h.in" manually. :-)`

M4 Source Code

      AC_DEFUN([AC_PREFIX_CONFIG_H],
      [changequote(<<, >>)dnl
      ac_prefix_conf_PKG=`echo ifelse($1, , $PACKAGE, $1)`
      ac_prefix_conf_PRE=`echo $ac_prefix_conf_PKG | tr 'abcdefghijklmnopqrstuvwxyz-' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
      ac_prefix_conf_PRE=`echo $ac_prefix_conf_PRE | sed -e '/^[0-9]/s/^/_/'`
      ac_prefix_conf_INP=`echo ifelse($2, , config.h, $2)`
      ac_prefix_conf_OUT=`echo ifelse($3, , $ac_prefix_conf_PKG-$ac_prefix_conf_INP, $3)`
      ac_prefix_conf_DEF=`echo _$ac_prefix_conf_OUT | tr 'abcdefghijklmnopqrstuvwxyz./,-' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ____'`
      changequote([, ])dnl
      if test -z "$ac_prefix_conf_PKG" ; then
         AC_MSG_ERROR([no prefix for _PREFIX_CONFIG_H])
      else
        AC_MSG_RESULT(creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_PRE for $ac_prefix_conf_INP defines)
        if test -f $ac_prefix_conf_INP ; then
          echo '#ifndef '$ac_prefix_conf_DEF >$ac_prefix_conf_OUT
          echo '#define '$ac_prefix_conf_DEF' 1' >>$ac_prefix_conf_OUT
          echo ' ' >>$ac_prefix_conf_OUT
          echo /'*' $ac_prefix_conf_OUT. Generated automatically at end of configure. '*'/ >>$ac_prefix_conf_OUT

          echo 's/#undef  */#undef '$ac_prefix_conf_PRE'_/' >conftest.sed
          echo 's/#define  *\([A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_PRE"_\\1 \\" >>conftest.sed
          echo '#define '$ac_prefix_conf_PRE"_\\1 \\2 \\" >>conftest.sed
          echo '#endif/' >>conftest.sed
          sed -f conftest.sed $ac_prefix_conf_INP >>$ac_prefix_conf_OUT
          echo ' ' >>$ac_prefix_conf_OUT
          echo '/*' $ac_prefix_conf_DEF '*/' >>$ac_prefix_conf_OUT
          echo '#endif' >>$ac_prefix_conf_OUT
        else
          AC_MSG_ERROR([input file $ac_prefix_conf_IN does not exist, dnl
          skip generating $ac_prefix_conf_OUT])
        fi
        rm -f conftest.*
      fi])