Add flex.mk, based on texinfo.mk, to check the version of the

platform-provided flex. Packages can set FLEX_REQD to require a
minimum flex version.

2 files changed, 70 insertions, 1 deletions

diff --git a/mk/tools/bsd.tools.mk b/mk/tools/bsd.tools.mk
index d82e26b261d..ba76cfc9d5e 100644
--- a/mk/tools/bsd.tools.mk
+++ b/mk/tools/bsd.tools.mk
@@ -1,4 +1,4 @@
-# $NetBSD: bsd.tools.mk,v 1.50 2009/03/17 22:13:36 rillig Exp $
+# $NetBSD: bsd.tools.mk,v 1.51 2011/11/26 14:58:45 hans Exp $
 #
 # Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -151,6 +151,7 @@ post-tools:
 .include "autoconf.mk"
 .include "texinfo.mk"
 .include "gettext.mk"
+.include "flex.mk"
 .include "intltool.mk"
 .include "ldconfig.mk"
 .include "rpcgen.mk"
diff --git a/mk/tools/flex.mk b/mk/tools/flex.mk
new file mode 100644
index 00000000000..5a609758e8f
--- /dev/null
+++ b/mk/tools/flex.mk
@@ -0,0 +1,68 @@
+# $NetBSD: flex.mk,v 1.1 2011/11/26 14:58:45 hans Exp $
+#
+# Copyright (c) 2005 The NetBSD Foundation, Inc.
+# All rights reserved.
+#
+# This code is derived from software contributed to The NetBSD Foundation
+# by Johnny C. Lam.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. All advertising materials mentioning features or use of this software
+#    must display the following acknowledgement:
+#        This product includes software developed by the NetBSD
+#        Foundation, Inc. and its contributors.
+# 4. Neither the name of The NetBSD Foundation nor the names of its
+#    contributors may be used to endorse or promote products derived
+#    from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+FLEX_REQD?=		2.5.4
+
+# If the package does explicitly request flex as a tool, then determine if the
+# platform-provided flex's version is at least ${FLEX_REQD}.  If it isn't, then
+# tell the tools framework to use the pkgsrc flex.
+#
+
+.if !empty(USE_TOOLS:C/:.*//:Mflex) && \
+    defined(TOOLS_PLATFORM.flex) && !empty(TOOLS_PLATFORM.flex)
+.  if !defined(_TOOLS_USE_PKGSRC.flex)
+_TOOLS_VERSION.flex!=							\
+	${TOOLS_PLATFORM.flex} --version |				\
+	${SED} -e 's/\(.*\) \(.*\)$$/\2/'
+_TOOLS_PKG.flex=		flex-${_TOOLS_VERSION.flex}
+_TOOLS_USE_PKGSRC.flex=	no
+.    for _dep_ in flex>=${FLEX_REQD}
+.      if !empty(_TOOLS_USE_PKGSRC.flex:M[nN][oO])
+_TOOLS_USE_PKGSRC.flex!=						\
+	if ${PKG_ADMIN} pmatch ${_dep_:Q} ${_TOOLS_PKG.flex:Q}; then \
+		${ECHO} no;						\
+	else								\
+		${ECHO} yes;						\
+	fi
+.      endif
+.    endfor
+.  endif
+MAKEVARS+=	_TOOLS_USE_PKGSRC.flex
+.endif
+
+CONFIGURE_ENV+=		FLEX=${TOOLS_CMD.flex:Q}
+MAKE_ENV+=		FLEX=${TOOLS_CMD.flex:Q}