dnl
dnl OpenLDAP Autoconf Macros
dnl
dnl --------------------------------------------------------------------
dnl Restricted form of AC_ARG_ENABLE that limits user options
dnl
dnl $1 = option name
dnl $2 = help-string
dnl $3 = default value	(auto)
dnl $4 = allowed values (auto yes no)
AC_DEFUN([OL_ARG_ENABLE], [# OpenLDAP --enable-$1
	AC_ARG_ENABLE($1,[$2 (]ifelse($3,,auto,$3)[)],[
	ol_arg=invalid
	for ol_val in ifelse($4,,[auto yes no],[$4]) ; do
		if test "$enableval" = "$ol_val" ; then
			ol_arg="$ol_val"
		fi
	done
	if test "$ol_arg" = "invalid" ; then
		AC_MSG_ERROR(bad value $enableval for --enable-$1)
	fi
	ol_enable_$1="$ol_arg"
],
[	ol_enable_$1=ifelse($3,,"auto","$3")])dnl
dnl AC_VERBOSE(OpenLDAP -enable-$1 $ol_enable_$1)
# end --enable-$1
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Restricted form of AC_ARG_WITH that limits user options
dnl
dnl $1 = option name
dnl $2 = help-string
dnl $3 = default value (no)
dnl $4 = allowed values (yes or no)
AC_DEFUN([OL_ARG_WITH], [# OpenLDAP --with-$1
	AC_ARG_WITH($1,[$2 (]ifelse($3,,yes,$3)[)],[
	ol_arg=invalid
	for ol_val in ifelse($4,,[yes no],[$4]) ; do
		if test "$withval" = "$ol_val" ; then
			ol_arg="$ol_val"
		fi
	done
	if test "$ol_arg" = "invalid" ; then
		AC_MSG_ERROR(bad value $withval for --with-$1)
	fi
	ol_with_$1="$ol_arg"
],
[	ol_with_$1=ifelse($3,,"no","$3")])dnl
dnl AC_VERBOSE(OpenLDAP --with-$1 $ol_with_$1)
# end --with-$1
])dnl
dnl
dnl ====================================================================
dnl Check if db.h is Berkeley DB2
dnl
dnl defines ol_cv_header_db2 to 'yes' or 'no'
dnl
dnl uses:
dnl		AC_CHECK_HEADERS(db.h)
dnl
AC_DEFUN([OL_HEADER_BERKELEY_DB2],
[AC_CHECK_HEADERS(db.h)
if test $ac_cv_header_db_h = yes ; then
	AC_CACHE_CHECK([if db.h is DB2], [ol_cv_header_db2],[
		AC_EGREP_CPP(__db_version_2,[
#			include <db.h>
			/* this check could be improved */
#			ifdef DB_VERSION_MAJOR
#				if DB_VERSION_MAJOR == 2
					__db_version_2
#				endif
#			endif
		], ol_cv_header_db2=yes, ol_cv_header_db2=no)])
else
	ol_cv_header_db2=no
fi
])dnl
dnl --------------------------------------------------------------------
dnl Check if Berkeley DB2 library exists
dnl Check for dbopen in standard libraries or -ldb
dnl
dnl defines ol_cv_lib_db2 to '-ldb' or 'no'
dnl
dnl uses:
dnl		AC_CHECK_LIB(db,db_open)
dnl
AC_DEFUN([OL_LIB_BERKELEY_DB2],
[AC_CACHE_CHECK([for DB2 library], [ol_cv_lib_db2],
[	ol_LIBS="$LIBS"
	AC_CHECK_LIB(db,db_open,[ol_cv_lib_db2=-ldb],[ol_cv_lib_db2=no])
	LIBS="$ol_LIBS"
])
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Check if Berkeley db2 exists
dnl
dnl defines ol_cv_berkeley_db2 to 'yes' or 'no'
dnl 
dnl uses:
dnl		OL_LIB_BERKELEY_DB2
dnl		OL_HEADER_BERKELEY_DB2
dnl
AC_DEFUN([OL_BERKELEY_DB2],
[AC_REQUIRE([OL_LIB_BERKELEY_DB2])
 AC_REQUIRE([OL_HEADER_BERKELEY_DB2])
 AC_CACHE_CHECK([for Berkeley DB2], [ol_cv_berkeley_db2], [
	if test $ol_cv_lib_db2 = no -o $ol_cv_header_db2 = no ; then
		ol_cv_berkeley_db2=no
	else
		ol_cv_berkeley_db2=yes
	fi
])
])dnl
dnl
dnl ====================================================================
dnl Check for db.h/db_185.h is Berkeley DB
dnl
dnl defines ol_cv_header_db to 'yes' or 'no'
dnl
dnl uses:
dnl		OL_HEADER_BERKELEY_DB2
dnl		AC_CHECK_HEADERS(db_185.h)
dnl
AC_DEFUN([OL_HEADER_BERKELEY_DB],
[AC_REQUIRE([OL_HEADER_BERKELEY_DB2])
AC_CHECK_HEADERS(db_185.h)
if test $ol_cv_header_db2 = yes ; then
	dnl db.h is db2! 

	ol_cv_header_db=$ac_cv_header_db_185_h
else
	ol_cv_header_db=$ac_cv_header_db_h
fi
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Check if Berkeley DB library exists
dnl Check for dbopen in standard libraries or -ldb
dnl
dnl defines ol_cv_lib_db to 'yes' or '-ldb' or 'no'
dnl		'yes' implies dbopen is in $LIBS
dnl
dnl uses:
dnl		AC_CHECK_FUNC(dbopen)
dnl		AC_CHECK_LIB(db,dbopen)
dnl
AC_DEFUN([OL_LIB_BERKELEY_DB],
[AC_CACHE_CHECK([for Berkeley DB library], [ol_cv_lib_db],
[	ol_LIBS="$LIBS"
	AC_CHECK_FUNC(dbopen,[ol_cv_lib_db=yes], [
		AC_CHECK_LIB(db,dbopen,[ol_cv_lib_db=-ldb],[ol_cv_lib_db=no])
	])
	LIBS="$ol_LIBS"
])
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Check if Berkeley DB exists
dnl
dnl defines ol_cv_berkeley_db to 'yes' or 'no'
dnl 
dnl uses:
dnl		OL_LIB_BERKELEY_DB
dnl		OL_HEADER_BERKELEY_DB
dnl
AC_DEFUN([OL_BERKELEY_DB],
[AC_REQUIRE([OL_LIB_BERKELEY_DB])
 AC_REQUIRE([OL_HEADER_BERKELEY_DB])
 AC_CACHE_CHECK([for Berkeley DB], [ol_cv_berkeley_db], [
	if test $ol_cv_lib_db = no -o $ol_cv_header_db = no ; then
		ol_cv_berkeley_db=no
	else
		ol_cv_berkeley_db=yes
	fi
])
])dnl
dnl
dnl ====================================================================
dnl Check if GDBM library exists
dnl Check for gdbm_open in standard libraries or -lgdbm
dnl
dnl defines ol_cv_lib_gdbm to 'yes' or '-lgdbm' or 'no'
dnl		'yes' implies gdbm_open is in $LIBS
dnl
dnl uses:
dnl		AC_CHECK_FUNC(gdbm_open)
dnl		AC_CHECK_LIB(gdbm,gdbm_open)
dnl
AC_DEFUN([OL_LIB_GDBM],
[AC_CACHE_CHECK(for GDBM library, [ol_cv_lib_gdbm],
[	ol_LIBS="$LIBS"
	AC_CHECK_FUNC(gdbm_open,[ol_cv_lib_gdbm=yes], [
		AC_CHECK_LIB(gdbm,gdbm_open,[ol_cv_lib_gdbm=-lgdbm],[ol_cv_lib_gdbm=no])
	])
	LIBS="$ol_LIBS"
])
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Check if GDBM exists
dnl
dnl defines ol_cv_gdbm to 'yes' or 'no'
dnl 
dnl uses:
dnl		OL_LIB_GDBM
dnl		AC_CHECK_HEADERS(gdbm.h)
dnl
AC_DEFUN([OL_GDBM],
[AC_REQUIRE([OL_LIB_GDBM])
 AC_CHECK_HEADERS(gdbm.h)
 AC_CACHE_CHECK(for db, [ol_cv_gdbm], [
	if test $ol_cv_lib_gdbm = no -o $ac_cv_header_gdbm_h = no ; then
		ol_cv_gdbm=no
	else
		ol_cv_gdbm=yes
	fi
])
])dnl
dnl
dnl ====================================================================
dnl Check if NDBM library exists
dnl Check for dbm_open in standard libraries or -lndbm or -ldbm
dnl
dnl defines ol_cv_lib_ndbm to 'yes' or '-lndbm' or -ldbm or 'no'
dnl		'yes' implies ndbm_open is in $LIBS
dnl
dnl uses:
dnl		AC_CHECK_FUNC(dbm_open)
dnl		AC_CHECK_LIB(ndbm,dbm_open)
dnl		AC_CHECK_LIB(dbm,dbm_open)
dnl
dnl restrictions:
dnl		should also check SVR4 case: dbm_open() in -lucb but that
dnl		would requiring dealing with -L/usr/ucblib
dnl
AC_DEFUN([OL_LIB_NDBM],
[AC_CACHE_CHECK(for NDBM library, [ol_cv_lib_ndbm],
[	ol_LIBS="$LIBS"
	AC_CHECK_FUNC(dbm_open,[ol_cv_lib_ndbm=yes], [
		AC_CHECK_LIB(ndbm,dbm_open,[ol_cv_lib_ndbm=-lndbm], [
			AC_CHECK_LIB(dbm,dbm_open,[ol_cv_lib_ndbm=-ldbm],
				[ol_cv_lib_ndbm=no])dnl
		])
	])
	LIBS="$ol_LIBS"
])
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Check if NDBM exists
dnl
dnl defines ol_cv_ndbm to 'yes' or 'no'
dnl 
dnl uses:
dnl		OL_LIB_NDBM
dnl		AC_CHECK_HEADERS(ndbm.h)
dnl
dnl restrictions:
dnl		Doesn't handle SVR4 case (see above)
dnl
AC_DEFUN([OL_NDBM],
[AC_REQUIRE([OL_LIB_NDBM])
 AC_CHECK_HEADERS(ndbm.h)
 AC_CACHE_CHECK(for db, [ol_cv_ndbm], [
	if test $ol_cv_lib_ndbm = no -o $ac_cv_header_ndbm_h = no ; then
		ol_cv_ndbm=no
	else
		ol_cv_ndbm=yes
	fi
])
])dnl
dnl
dnl ====================================================================
dnl Check POSIX Thread version 
dnl
dnl defines ol_cv_posix_version to 'final' or 'draft' or 'unknown'
dnl 	'unknown' implies that the version could not be detected
dnl		or that pthreads.h does exist.  Existance of pthreads.h
dnl		should be tested separately.
dnl
AC_DEFUN([OL_POSIX_THREAD_VERSION],
[AC_CACHE_CHECK([POSIX thread version],[ol_cv_pthread_version],[
	AC_EGREP_CPP(final,[
#		include <pthread.h>
		/* this check could be improved */
#		ifdef PTHREAD_ONCE_INIT
			final
#		endif
	], ol_pthread_final=yes, ol_pthread_final=no)

	AC_EGREP_CPP(draft4,[
#		include <pthread.h>
		/* this check could be improved */
#		ifdef pthread_once_init
			draft4
#		endif
	], ol_pthread_draft4=yes, ol_pthread_draft4=no)

	if test $ol_pthread_final = yes -a $ol_pthread_draft4 = no; then
		ol_cv_pthread_version=final
	elif test $ol_pthread_final = no -a $ol_pthread_draft4 = yes; then
		ol_cv_pthread_version=draft4
	else
		ol_cv_pthread_version=unknown
	fi
])
])dnl
dnl
dnl --------------------------------------------------------------------
dnl Check LinuxThread
dnl
dnl defines ol_cv_linux_threads to 'yes' or 'no'
dnl		'no' implies pthreads.h is not LinuxThreads or pthreads.h
dnl		doesn't exists.  Existance of pthread.h should separately
dnl		checked.
dnl 
AC_DEFUN([OL_LINUX_THREADS],
[
AC_CACHE_CHECK([for LinuxThreads], [ol_cv_linux_threads], [
	res=`grep Linuxthreads /usr/include/pthread.h 2>/dev/null | wc -l`
	if test "$res" -gt 0 ; then
		ol_cv_linux_threads=yes
	else
		ol_cv_linux_threads=no
	fi
])
])dnl
dnl
dnl ====================================================================
dnl Check for declaration of sys_errlist in one of stdio.h and errno.h.
dnl Declaration of sys_errlist on BSD4.4 interferes with our declaration.
dnl Reported by Keith Bostic.
AC_DEFUN([OL_SYS_ERRLIST],
[
AC_MSG_CHECKING([declaration of sys_errlist])
AC_CACHE_VAL(ol_cv_dcl_sys_errlist,[
	AC_TRY_COMPILE([
#include <stdio.h>
#include <sys/types.h>
#include <errno.h> ],
	[char *c = (char *) *sys_errlist],
	[ol_cv_dcl_sys_errlist=yes],
	[ol_cv_dcl_sys_errlist=no])])
AC_MSG_RESULT($ol_cv_dcl_sys_errlist)

# It's possible (for near-UNIX clones) that sys_errlist doesn't exist
if test $ol_cv_dcl_sys_errlist = no ; then
	AC_DEFINE(DECL_SYS_ERRLIST)
	AC_MSG_CHECKING([existence of sys_errlist])
	AC_CACHE_VAL(ol_cv_have_sys_errlist,[
		AC_TRY_LINK([#include <errno.h>],
			[char *c = (char *) *sys_errlist],
			[ol_cv_have_sys_errlist=yes],
			[ol_cv_have_sys_errlist=no])])
	AC_MSG_RESULT($ol_cv_have_sys_errlist)
fi
])dnl