configure.in.fns

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dnl
dnl autoconf rules to find things in general
dnl


dnl
dnl General approach to using these macros:
dnl
dnl bracket a group of them that must succeed or fail together
dnl with NS_BEGIN_PACKAGE(s)/NS_END_PACKAGE(s).
dnl In between put NS_CHECK_{LIB,HEADER}_PATH().
dnl Custom checks can call NS_PACKAGE_NOT_COMPLETE(s) if something's wrong.
dnl
dnl See configure.in.dmalloc for an example.
dnl
dnl These macros add their stuff to V_LIBS, V_INCLUDES, V_DEFINES.
dnl You should add them to your Makefile.in
dnl You also need to put NS_FNS_TAIL in your configure.in
dnl (typically just before including configure.in.tail).
dnl
dnl


dnl
dnl NS_BEGIN_PACKAGE(NAME)
dnl
dnl (Internally, _UNDERWAY says that we found some part of it,
dnl _COMPLETE says we've got all of it.)
dnl
AC_DEFUN(NS_BEGIN_PACKAGE,
[
NS_PACKAGE_[$1]_UNDERWAY=false
NS_PACKAGE_[$1]_COMPLETE=true
])

dnl
dnl If a test fails, call NS_PACKAGE_NOT_COMPLETE(NAME) to cause NS_END_PACKAGE to
dnl eventually die.
dnl
AC_DEFUN(NS_PACKAGE_NOT_COMPLETE,
[
NS_PACKAGE_[$1]_COMPLETE=false
])

dnl
dnl NS_END_PACKAGE(NAME,REQUIRED)
dnl REQUIRED should be "yes" or "no"
dnl
AC_DEFUN(NS_END_PACKAGE,
[
NS_PACKAGE_[$1]_VALID=false
if $NS_PACKAGE_[$1]_UNDERWAY; then
	if $NS_PACKAGE_[$1]_COMPLETE; then
		: [All components of $1 found.]
		NS_PACKAGE_[$1]_VALID=true
	else
		AC_MSG_ERROR([Installation of $1 seems incomplete.
Please correct the problem or re-run with --with-$1=no.])
	fi
fi
if test "x$2" = xyes; then
	if $NS_PACKAGE_[$1]_VALID; then
		:
	else
		AC_MSG_ERROR([$1 is required but could not be completely found.])
	fi
fi
])

dnl
dnl NS_CHECK_LIB_PATH(LIBRARY,PATH,SUGGESTION,SUGGESTION_PATH,VARIABLE,PACKAGE)
dnl LIBRARY should be with a dotted version number but without a .a extension
dnl PATH is whitespace separated
dnl SUGGESTION, no disables, "" or "yes" enables, otherwise search SUGGESTION_PATH
dnl SUGGESTION_PATH
dnl sets VARIABLE to be the include stuff
dnl PACKAGE is the name specified in NS_{BEGIN,END}_PACKAGE or "no"
dnl
dnl Automatically adds it to V_LIBS and adds a -DHAVE_LIBLIBRARY to V_DEFINES
dnl

AC_DEFUN(NS_CHECK_LIB_PATH,
[
AC_MSG_CHECKING([for lib$1])
if test "x$3" = "xno"; then
	: disable library
	$5=FAIL
	NS_PACKAGE_NOT_COMPLETE($6)
	AC_MSG_RESULT(no)

else
	places="$2"
	if test "x$3" != "x" -a "x$3" != xyes; then
		if test ! -d $3; then
			AC_MSG_ERROR($3 is not a directory)
		fi
		places="$4"
	fi

	$5=""
	dnl full_lib_name is libtcl7.6
	full_lib_name="$1"
	dnl simple_lib_name is libtcl76
	simple_lib_name=`echo $full_lib_name | sed -e 's/\.//'`
	dnl other_simple_lib_name is libtcl7_6
	other_simple_lib_name=`echo $full_lib_name | sed -e 's/\./_/'`
	dnl simpler_lib_name is libtcl
	simpler_lib_name=`echo $simple_lib_name | sed -e 'y/0123456789/          /'`
	double_break=false
	for dir in $places; do
		for file in $full_lib_name $simple_lib_name $other_simple_lib_name $simpler_lib_name
		do
			if test -r $dir/lib$file.so -o -r $dir/lib$file.a; then
				$5="-L$dir -l$file"
				double_break=true
				break
			fi
		done
		if $double_break; then
			break
		fi
	done
	if test "FAIL$[$5]" = "FAIL" ; then
		NS_PACKAGE_NOT_COMPLETE($6)
		AC_MSG_RESULT(no)
	else
		if test "$solaris"; then
			$5="-R$dir $[$5]"
		fi

		changequote(, )dnl
		ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
		    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
		changequote([, ])dnl
		AC_DEFINE_UNQUOTED($ac_tr_lib)

		dnl add to list
		V_LIBS="$[$5] $V_LIBS"
		V_DEFINES="-D$ac_tr_lib $V_DEFINES"

		NS_PACKAGE_[$6]_UNDERWAY=true

		AC_MSG_RESULT($[$5])
	fi
fi
])



dnl
dnl NS_CHECK_HEADER_PATH(HEADER,PATH,SUGGESTION,SUGGESTION_PATH,VARIABLE,PACKAGE)
dnl HEADER should be file with an extension
dnl PATH is whitespace separated
dnl SUGGESTION, no disables, "" or "yes" enables, otherwise search SUGGESTION_PATH
dnl SUGGESTION_PATH
dnl sets VARIABLE to be the include stuff
dnl PACKAGE is the name specified in NS_{BEGIN,END}_PACKAGE or "no"
dnl
dnl Automatically adds it to V_INCLUDES and adds a -DHAVE_HEADER to V_DEFINES
dnl

AC_DEFUN(NS_CHECK_HEADER_PATH,
[
AC_MSG_CHECKING([for $1])
if test "x$3" = "xno"; then
	: disable header
	$5=FAIL
	NS_PACKAGE_NOT_COMPLETE($6)
	AC_MSG_RESULT(no)

else
	places="$2"
	if test "x$3" != "x" -a "x$3" != xyes; then
		if test ! -d $3; then
			AC_MSG_ERROR($3 is not a directory)
		fi
		places="$4"
	fi

	$5=""
	for dir in $places; do
		if test -r $dir/$1; then
			$5="-I$dir"
			break
		fi
	done
	if test "FAIL$[$5]" = "FAIL" ; then
		NS_PACKAGE_NOT_COMPLETE($6)
		AC_MSG_RESULT(no)
	else

		changequote(, )dnl
		  ac_tr_hdr=HAVE_`echo $1 | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
		changequote([, ])dnl
                AC_DEFINE_UNQUOTED($ac_tr_hdr)

		V_INCLUDES="$[$5] $V_INCLUDES"
		V_DEFINES="-D$ac_tr_hdr $V_DEFINES"

		NS_PACKAGE_[$6]_UNDERWAY=true

		AC_MSG_RESULT($[$5])
	fi
fi
])


dnl
dnl NS_CHECK_ANY_PATH(ANY,PATH,SUGGESTION,SUGGESTION_PATH,VARIABLE,PACKAGE)
dnl ANY shoudl be the file
dnl PATH is whitespace separated
dnl SUGGESTION, no disables, "" or "yes" enables, otherwise search SUGGESTION_PATH
dnl SUGGESTION_PATH
dnl sets VARIABLE to be the include stuff
dnl PACKAGE is the name specified in NS_{BEGIN,END}_PACKAGE or "no"
dnl

AC_DEFUN(NS_CHECK_ANY_PATH,
[
AC_MSG_CHECKING([for $1])
if test "x$3" = "xno"; then
	: disable header
	$5=FAIL
	NS_PACKAGE_NOT_COMPLETE($6)
	AC_MSG_RESULT(no)

else
	places="$2"
	if test "x$3" != "x" -a "x$3" != xyes; then
		if test ! -d $3; then
			AC_MSG_ERROR($3 is not a directory)
		fi
		places="$4"
	fi

	$5=""
	for dir in $places; do
		if test -r $dir/$1; then
			$5="$dir"
			break
		fi
	done
	if test "FAIL$[$5]" = "FAIL" ; then
		NS_PACKAGE_NOT_COMPLETE($6)
		AC_MSG_RESULT(no)
	else

		NS_PACKAGE_[$6]_UNDERWAY=true

		AC_MSG_RESULT($[$5])
	fi
fi
])



dnl
dnl Final stuff for fns
dnl
AC_DEFUN(NS_FNS_TAIL,
[
AC_SUBST(V_INCLUDES)
AC_SUBST(V_LIBS)
AC_SUBST(V_DEFINES)
dnl AC_SUBST(V_OBJS)
])