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generated...
2007-08-05

(C) 2007 guidod
Download the M4 Source.

ax_configure_args

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Synopsis
AX_CONFIGURE_ARGS
, 
Version

2007-02-01

Author

Guido Draheim

License

GPLWithACException
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts

Category

guidod's Miscellaneous (released)

Documentation

Helper macro for AX_ENABLE_BUILDDIR and AX_ENABLE_BUILDDIR_UNAME

The traditional way of starting a subdir-configure is running the script with ${1+"$@"} but since autoconf 2.60 this is broken. Instead we have to rely on eval'ing $ac_configure_args however some old autoconf versions do not provide that. To ensure maximum portability of autoconf extension macros this helper can be AC_REQUIRE'd so that $ac_configure_args will alsways be present.

Sadly, the traditional "exec $SHELL" of the enable_builddir macros is spoiled now and must be replaced by eval + exit $?

example:

  AC_DEFUN([AX_ENABLE_SUBDIR],[dnl
    AC_REQUIRE([AX_CONFIGURE_ARGS])dnl
    eval $SHELL $ac_configure_args || exit $?
    ...])

M4 Source Code
AC_DEFUN([AX_CONFIGURE_ARGS],[
   # [$]@ is unsable in 2.60+ but earlier autoconf had no ac_configure_args
   if test "${ac_configure_args+set}" != "set" ; then
      ac_configure_args=
      for ac_arg in ${1+"[$]@"}; do
         ac_configure_args="$ac_configure_args '$ac_arg'"
      done
   fi         
])