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## Autoconf macros for working with Guile.
##
## Copyright (C) 1998, 2001, 2006, 2010 Free Software Foundation, Inc.
##
## This library is free software; you can redistribute it and/or
## modify it under the terms of the GNU Lesser General Public
## License as published by the Free Software Foundation; either
## version 2.1 of the License, or (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public
## License along with this library; if not, write to the Free Software
## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
## Index
## -----
##
## GUILE_PROGS -- set paths to Guile interpreter, config and tool programs
## GUILE_FLAGS -- set flags for compiling and linking with Guile
## GUILE_SITE_DIR -- find path to Guile "site" directory
## GUILE_CHECK -- evaluate Guile Scheme code and capture the return value
## GUILE_MODULE_CHECK -- check feature of a Guile Scheme module
## GUILE_MODULE_AVAILABLE -- check availability of a Guile Scheme module
## GUILE_MODULE_REQUIRED -- fail if a Guile Scheme module is unavailable
## GUILE_MODULE_EXPORTS -- check if a module exports a variable
## GUILE_MODULE_REQUIRED_EXPORT -- fail if a module doesn't export a variable
## Code
## ----
## NOTE: Comments preceding an AC_DEFUN (starting from "Usage:") are massaged
## into doc/ref/autoconf-macros.texi (see Makefile.am in that directory).
# GUILE_PROGS -- set paths to Guile interpreter, config and tool programs
#
# Usage: GUILE_PROGS
#
# This macro looks for programs @code{guile}, @code{guile-config} and
# @code{guile-tools}, and sets variables @var{GUILE}, @var{GUILE_CONFIG} and
# @var{GUILE_TOOLS}, to their paths, respectively. If either of the first two
# is not found, signal error.
#
# The variables are marked for substitution, as by @code{AC_SUBST}.
#
AC_DEFUN([GUILE_PROGS],
[AC_PATH_PROG(GUILE,guile)
if test "$GUILE" = "" ; then
AC_MSG_ERROR([guile required but not found])
fi
AC_SUBST(GUILE)
AC_PATH_PROG(GUILE_CONFIG,guile-config)
if test "$GUILE_CONFIG" = "" ; then
AC_MSG_ERROR([guile-config required but not found])
fi
AC_SUBST(GUILE_CONFIG)
AC_PATH_PROG(GUILE_TOOLS,guile-tools)
AC_SUBST(GUILE_TOOLS)
])
# GUILE_FLAGS -- set flags for compiling and linking with Guile
#
# Usage: GUILE_FLAGS
#
# This macro runs the @code{guile-config} script, installed with Guile, to
# find out where Guile's header files and libraries are installed. It sets
# two variables, @var{GUILE_CFLAGS} and @var{GUILE_LDFLAGS}.
#
# @var{GUILE_CFLAGS}: flags to pass to a C or C++ compiler to build code that
# uses Guile header files. This is almost always just a @code{-I} flag.
#
# @var{GUILE_LDFLAGS}: flags to pass to the linker to link a program against
# Guile. This includes @code{-lguile} for the Guile library itself, any
# libraries that Guile itself requires (like -lqthreads), and so on. It may
# also include a @code{-L} flag to tell the compiler where to find the
# libraries.
#
# The variables are marked for substitution, as by @code{AC_SUBST}.
#
AC_DEFUN([GUILE_FLAGS],
[AC_REQUIRE([GUILE_PROGS])dnl
AC_MSG_CHECKING([libguile compile flags])
GUILE_CFLAGS="`$GUILE_CONFIG compile`"
AC_MSG_RESULT([$GUILE_CFLAGS])
AC_MSG_CHECKING([libguile link flags])
GUILE_LDFLAGS="`$GUILE_CONFIG link`"
AC_MSG_RESULT([$GUILE_LDFLAGS])
AC_SUBST(GUILE_CFLAGS)
AC_SUBST(GUILE_LDFLAGS)
])
# GUILE_SITE_DIR -- find path to Guile "site" directory
#
# Usage: GUILE_SITE_DIR
#
# This looks for Guile's "site" directory, usually something like
# PREFIX/share/guile/site, and sets var @var{GUILE_SITE} to the path.
# Note that the var name is different from the macro name.
#
# The variable is marked for substitution, as by @code{AC_SUBST}.
#
AC_DEFUN([GUILE_SITE_DIR],
[AC_REQUIRE([GUILE_PROGS])dnl
AC_MSG_CHECKING(for Guile site directory)
GUILE_SITE=`[$GUILE_CONFIG] info pkgdatadir`/site
AC_MSG_RESULT($GUILE_SITE)
AC_SUBST(GUILE_SITE)
])
# GUILE_CHECK -- evaluate Guile Scheme code and capture the return value
#
# Usage: GUILE_CHECK_RETVAL(var,check)
#
# @var{var} is a shell variable name to be set to the return value.
# @var{check} is a Guile Scheme expression, evaluated with "$GUILE -c", and
# returning either 0 or non-#f to indicate the check passed.
# Non-0 number or #f indicates failure.
# Avoid using the character "#" since that confuses autoconf.
#
AC_DEFUN([GUILE_CHECK],
[AC_REQUIRE([GUILE_PROGS])
$GUILE -c "$2" > /dev/null 2>&1
$1=$?
])
# GUILE_MODULE_CHECK -- check feature of a Guile Scheme module
#
# Usage: GUILE_MODULE_CHECK(var,module,featuretest,description)
#
# @var{var} is a shell variable name to be set to "yes" or "no".
# @var{module} is a list of symbols, like: (ice-9 common-list).
# @var{featuretest} is an expression acceptable to GUILE_CHECK, q.v.
# @var{description} is a present-tense verb phrase (passed to AC_MSG_CHECKING).
#
AC_DEFUN([GUILE_MODULE_CHECK],
[AC_MSG_CHECKING([if $2 $4])
GUILE_CHECK($1,(use-modules $2) (exit ((lambda () $3))))
if test "$$1" = "0" ; then $1=yes ; else $1=no ; fi
AC_MSG_RESULT($$1)
])
# GUILE_MODULE_AVAILABLE -- check availability of a Guile Scheme module
#
# Usage: GUILE_MODULE_AVAILABLE(var,module)
#
# @var{var} is a shell variable name to be set to "yes" or "no".
# @var{module} is a list of symbols, like: (ice-9 common-list).
#
AC_DEFUN([GUILE_MODULE_AVAILABLE],
[GUILE_MODULE_CHECK($1,$2,0,is available)
])
# GUILE_MODULE_REQUIRED -- fail if a Guile Scheme module is unavailable
#
# Usage: GUILE_MODULE_REQUIRED(symlist)
#
# @var{symlist} is a list of symbols, WITHOUT surrounding parens,
# like: ice-9 common-list.
#
AC_DEFUN([GUILE_MODULE_REQUIRED],
[GUILE_MODULE_AVAILABLE(ac_guile_module_required, ($1))
if test "$ac_guile_module_required" = "no" ; then
AC_MSG_ERROR([required guile module not found: ($1)])
fi
])
# GUILE_MODULE_EXPORTS -- check if a module exports a variable
#
# Usage: GUILE_MODULE_EXPORTS(var,module,modvar)
#
# @var{var} is a shell variable to be set to "yes" or "no".
# @var{module} is a list of symbols, like: (ice-9 common-list).
# @var{modvar} is the Guile Scheme variable to check.
#
AC_DEFUN([GUILE_MODULE_EXPORTS],
[GUILE_MODULE_CHECK($1,$2,$3,exports `$3')
])
# GUILE_MODULE_REQUIRED_EXPORT -- fail if a module doesn't export a variable
#
# Usage: GUILE_MODULE_REQUIRED_EXPORT(module,modvar)
#
# @var{module} is a list of symbols, like: (ice-9 common-list).
# @var{modvar} is the Guile Scheme variable to check.
#
AC_DEFUN([GUILE_MODULE_REQUIRED_EXPORT],
[GUILE_MODULE_EXPORTS(guile_module_required_export,$1,$2)
if test "$guile_module_required_export" = "no" ; then
AC_MSG_ERROR([module $1 does not export $2; required])
fi
])
## guile.m4 ends here
|
