# Freeze M4 files.

# Copyright (C) 2002, 2004, 2006-2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# This program 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 General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

## ----------------- ##

## Freeze M4 files.  ##

## ----------------- ##

SUFFIXES = .m4 .m4f

AUTOM4TE_CFG = $(top_builddir)/lib/autom4te.cfg

$(AUTOM4TE_CFG): $(top_srcdir)/lib/autom4te.in

	cd $(top_builddir)/lib && $(MAKE) $(AM_MAKEFLAGS) autom4te.cfg

# Do not use AUTOM4TE here, since maint.mk (my-distcheck)

# checks if we are independent of Autoconf by defining AUTOM4TE (and

# others) to `false'.  Autoconf provides autom4te, so that doesn't

# apply to us.

MY_AUTOM4TE =									\

	autom4te_perllibdir='$(top_srcdir)'/lib					\

	AUTOM4TE_CFG='$(AUTOM4TE_CFG)'         $(top_builddir)/bin/autom4te	\

		-B '$(top_builddir)'/lib -B '$(top_srcdir)'/lib        # keep ` '

# When processing the file with diversion disabled, there must be no

# output but comments and empty lines.

# If freezing produces output, something went wrong: a bad `divert',

# or an improper paren etc.

# It may happen that the output does not end with an end of line, hence

# force an end of line when reporting errors.

.m4.m4f:

	$(MY_AUTOM4TE)				\

		--language=$*			\

		--freeze			\

		--output=$@

# Factor the dependencies between all the frozen files.

# Some day we should explain to Automake how to use autom4te to compute

# the dependencies...

src_libdir   = $(top_srcdir)/lib

build_libdir = $(top_builddir)/lib

m4f_dependencies = $(top_builddir)/bin/autom4te $(AUTOM4TE_CFG)

# For parallel builds.

$(build_libdir)/m4sugar/version.m4:

	cd $(build_libdir)/m4sugar && $(MAKE) $(AM_MAKEFLAGS) version.m4

m4sugar_m4f_dependencies =			\

	$(m4f_dependencies)			\

	$(src_libdir)/m4sugar/m4sugar.m4	\

	$(build_libdir)/m4sugar/version.m4

m4sh_m4f_dependencies =				\

	$(m4sugar_m4f_dependencies)		\

	$(src_libdir)/m4sugar/m4sh.m4

autotest_m4f_dependencies =			\

	$(m4sh_m4f_dependencies)		\

	$(src_libdir)/autotest/autotest.m4	\

	$(src_libdir)/autotest/general.m4	\

	$(src_libdir)/autotest/specific.m4

autoconf_m4f_dependencies =			\

	$(m4sh_m4f_dependencies)		\

	$(src_libdir)/autoconf/autoscan.m4	\

	$(src_libdir)/autoconf/general.m4	\

	$(src_libdir)/autoconf/autoheader.m4	\

	$(src_libdir)/autoconf/autoupdate.m4	\

	$(src_libdir)/autoconf/autotest.m4	\

	$(src_libdir)/autoconf/status.m4	\

	$(src_libdir)/autoconf/oldnames.m4	\

	$(src_libdir)/autoconf/specific.m4	\

	$(src_libdir)/autoconf/lang.m4		\

	$(src_libdir)/autoconf/c.m4		\

	$(src_libdir)/autoconf/fortran.m4	\

	$(src_libdir)/autoconf/erlang.m4	\

	$(src_libdir)/autoconf/go.m4		\

	$(src_libdir)/autoconf/functions.m4	\

	$(src_libdir)/autoconf/headers.m4	\

	$(src_libdir)/autoconf/types.m4		\

	$(src_libdir)/autoconf/libs.m4		\

	$(src_libdir)/autoconf/programs.m4	\

	$(src_libdir)/autoconf/autoconf.m4

## --------------------------- ##

## Run ETAGS on some M4 code.  ##

## --------------------------- ##

ETAGS_FOR_M4 = \

  --lang=none \

  --regex='/\(m4_define\|define\)(\[\([^]]*\)\]/\2/'

ETAGS_FOR_M4SUGAR = \

  $(ETAGS_FOR_M4) \

  --regex='/m4_defun(\[\([^]]*\)\]/\1/'

ETAGS_FOR_AUTOCONF = \

  $(ETAGS_FOR_M4SUGAR) \

  --regex='/\(A[CU]_DEFUN\|AU_ALIAS\)(\[\([^]]*\)\]/\2/' \

  --regex='/AN_\(FUNCTION\|HEADER\|IDENTIFIER\|LIBRARY\|MAKEVAR\|PROGRAM\)(\[\([^]]*\)\]/\2/'

## -------------------------------- ##

## Looking for forbidden patterns.  ##

## -------------------------------- ##

check-forbidden-patterns:

	@if (cd $(srcdir) && \

	    $(GREP) $(forbidden_patterns) $(forbidden_patterns_files)) \

	    >forbidden.log; then \

	  echo "ERROR: forbidden patterns were found:" >&2; \

	  sed "s|^|$*.m4: |" <forbidden.log >&2; \

	  echo >&2; \

	  exit 1; \

	else \

	  rm -f forbidden.log; \

	fi