AX_PROG_BISON: test whether AC_PROG_YACC found bison (initial version)

1 files changed, 66 insertions, 0 deletions

diff --git a/m4/ax_prog_bison.m4 b/m4/ax_prog_bison.m4
new file mode 100644
index 0000000..d17e06d
--- /dev/null
+++ b/m4/ax_prog_bison.m4
@@ -0,0 +1,66 @@
+##### http://autoconf-archive.cryp.to/ax_prog_bison.html
+#
+# SYNOPSIS
+#
+#   AX_PROG_BISON(ACTION-IF-TRUE,ACTION-IF-FALSE)
+#
+# DESCRIPTION
+#
+#   Check whether bison is the parser generator. Run ACTION-IF-TRUE if
+#   successful, ACTION-IF-FALSE otherwise
+#
+# LAST MODIFICATION
+#
+#   2008-02-28
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>
+#
+#   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 2 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, write to the Free Software
+#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+#   02111-1307, USA.
+#
+#   As a special exception, the respective Autoconf Macro's copyright
+#   owner gives unlimited permission to copy, distribute and modify the
+#   configure scripts that are the output of Autoconf when processing
+#   the Macro. You need not follow the terms of the GNU General Public
+#   License when using or distributing such scripts, even though
+#   portions of the text of the Macro appear in them. The GNU General
+#   Public License (GPL) does govern all other use of the material that
+#   constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the
+#   Autoconf Macro released by the Autoconf Macro Archive. When you
+#   make and distribute a modified version of the Autoconf Macro, you
+#   may extend this special exception to the GPL to apply to your
+#   modified version as well.
+
+AC_DEFUN([AX_PROG_BISON], [
+  AC_REQUIRE([AC_PROG_YACC])
+  AC_CACHE_CHECK([if bison is the parser generator],[ax_cv_prog_bison],[
+    AS_IF([test -n "`echo $YACC | sed 's/^.*\(bison\).*/\1/'`"],[
+      ax_cv_prog_bison=yes
+    ],[
+      ax_cv_prog_bison=no
+    ])
+  ])
+  AS_IF([test "$ax_cv_prog_bison" = yes],[
+    :
+    $1
+  ],[
+    :
+    $2
+  ])
+])