configure.ac

#
# autoconf input for Objective Caml programs
# Copyright (C) 2001 Jean-Christophe Filliâtre
#   from a first script by Georges Mariano 
# 
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License version 2, as published by the Free Software Foundation.
# 
# 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 Library General Public License version 2 for more details
# (enclosed in the file LGPL).

# the script generated by autoconf from this input will set the following
# variables:
#   OCAMLC        "ocamlc" if present in the path, or a failure
#                 or "ocamlc.opt" if present with same version number as ocamlc
#   OCAMLOPT      "ocamlopt" (or "ocamlopt.opt" if present), or "no"
#   OCAMLBEST     either "byte" if no native compiler was found, 
#                 or "opt" otherwise
#   OCAMLDEP      "ocamldep"
#   OCAMLLEX      "ocamllex"
#   OCAMLYACC     "ocamlyac"
#   OCAMLLIB      the path to the ocaml standard library
#   OCAMLVERSION  the ocaml version number
#   OCAMLWEB      "ocamlweb" (not mandatory)

# check for one particular file of the sources 
# ADAPT THE FOLLOWING LINE TO YOUR SOURCES!
AC_INIT(cgi.mli)

# Check for Ocaml compilers

# we first look for ocamlc in the path; if not present, we fail
AC_CHECK_PROG(OCAMLC,ocamlc,ocamlc,no)
if test "$OCAMLC" = no ; then
	AC_MSG_ERROR(Cannot find ocamlc.)
fi

# we extract Ocaml version number and library path
OCAMLVERSION=`$OCAMLC -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
echo "ocaml version is $OCAMLVERSION"
OCAMLLIB=`$OCAMLC -v | tail -1 | cut -f 4 -d " "`
echo "ocaml library path is $OCAMLLIB"

# then we look for ocamlopt; if not present, we issue a warning
# if the version is not the same, we also discard it
# we set OCAMLBEST to "opt" or "byte", whether ocamlopt is available or not
AC_CHECK_PROG(OCAMLOPT,ocamlopt,ocamlopt,no)
OCAMLBEST=byte
if test "$OCAMLOPT" = no ; then
	AC_MSG_WARN(Cannot find ocamlopt; bytecode compilation only.)
else
	AC_MSG_CHECKING(ocamlopt version)
	TMPVERSION=`$OCAMLOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
	if test "$TMPVERSION" != $OCAMLVERSION ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlopt discarded.)
	    OCAMLOPT=no
	else
	    AC_MSG_RESULT(ok)
	    OCAMLBEST=opt
	fi
fi

# checking for ocamlc.opt
AC_CHECK_PROG(OCAMLCDOTOPT,ocamlc.opt,ocamlc.opt,no)
if test "$OCAMLCDOTOPT" != no ; then
	AC_MSG_CHECKING(ocamlc.opt version)
	TMPVERSION=`$OCAMLCDOTOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
	if test "$TMPVERSION" != $OCAMLVERSION ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlc.opt discarded.)
	else
	    AC_MSG_RESULT(ok)
	    OCAMLC=$OCAMLCDOTOPT
	fi
fi

# checking for ocamlopt.opt
if test "$OCAMLOPT" != no ; then
    AC_CHECK_PROG(OCAMLOPTDOTOPT,ocamlopt.opt,ocamlopt.opt,no)
    if test "$OCAMLOPTDOTOPT" != no ; then
	AC_MSG_CHECKING(ocamlc.opt version)
	TMPVER=`$OCAMLOPTDOTOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
	if test "$TMPVER" != $OCAMLVERSION ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlopt.opt discarded.)
	else
	    AC_MSG_RESULT(ok)
	    OCAMLOPT=$OCAMLOPTDOTOPT
	fi
    fi
fi

# ocamldep, ocamllex and ocamlyacc should also be present in the path
AC_CHECK_PROG(OCAMLDEP,ocamldep,ocamldep,no)
if test "$OCAMLDEP" = no ; then
	AC_MSG_ERROR(Cannot find ocamldep.)
fi

AC_CHECK_PROG(OCAMLLEX,ocamllex,ocamllex,no)
if test "$OCAMLLEX" = no ; then
	AC_MSG_ERROR(Cannot find ocamllex.)
fi

AC_CHECK_PROG(OCAMLYACC,ocamlyacc,ocamlyacc,no)
if test "$OCAMLYACC" = no ; then
	AC_MSG_ERROR(Cannot find ocamlyacc.)
fi

AC_CHECK_PROG(OCAMLWEB,ocamlweb,ocamlweb,true)

# substitutions to perform
AC_SUBST(OCAMLC)
AC_SUBST(OCAMLOPT)
AC_SUBST(OCAMLDEP)
AC_SUBST(OCAMLLEX)
AC_SUBST(OCAMLYACC)
AC_SUBST(OCAMLBEST)
AC_SUBST(OCAMLVERSION)
AC_SUBST(OCAMLLIB)
AC_SUBST(OCAMLWEB)

# Finally create the Makefile from Makefile.in
AC_OUTPUT(Makefile)
chmod a-w Makefile