[Macro Index Page] | [Download M4 Source] |
AC_DEFINE_DIR(VARNAME, DIR [, DESCRIPTION])
This macro _AC_DEFINEs VARNAME to the expansion of the DIR variable, taking care of fixing up ${prefix} and such.
VARNAME is offered as both a C preprocessor symbol, and an output variable.
Note that the 3 argument form is only supported with autoconf 2.13 and later (i.e. only where _AC_DEFINE supports 3 arguments).
Examples:
AC_DEFINE_DIR(DATADIR, datadir) AC_DEFINE_DIR(PROG_PATH, bindir, [Location of installed binaries])
1.4 (last modified: 2003-10-28)
Guido Draheim <guidod@gmx.de>, original by Alexandre Oliva
AC_DEFUN([AC_DEFINE_DIR], [ test "x$prefix" = xNONE && prefix="$ac_default_prefix" test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' ac_define_dir=`eval echo [$]$2` ac_define_dir=`eval echo [$]ac_define_dir` $1="$ac_define_dir" AC_SUBST($1) ifelse($3, , AC_DEFINE_UNQUOTED($1, "$ac_define_dir"), AC_DEFINE_UNQUOTED($1, "$ac_define_dir", $3)) ])