llvm-mirror/autoconf/m4/bison.m4

#
# Check for Bison. 
#
# This macro verifies that Bison is installed.  If successful, then
# 1) YACC is set to bison -y (to emulate YACC calls)
# 2) BISON is set to bison
#
AC_DEFUN([AC_PROG_BISON],
[AC_CACHE_CHECK([],[llvm_cv_has_bison],[AC_PROG_YACC()])
if test "$YACC" != "bison -y"; then
  AC_SUBST(BISON,[])
  AC_MSG_WARN([bison not found, can't rebuild grammars])
else
  AC_SUBST(BISON,[bison])
fi])
Individual autoconf function broken out of acincludes.m4. This change per the recommended style guide for autoconf and so that individual autoconf functions can more easily be shared across projects. llvm-svn: 16223 2004-09-07 06:56:14 +00:00			`#`
			`# Check for Bison.`
			`#`
			`# This macro verifies that Bison is installed. If successful, then`
			`# 1) YACC is set to bison -y (to emulate YACC calls)`
			`# 2) BISON is set to bison`
			`#`
			`AC_DEFUN([AC_PROG_BISON],`
Minor syntactical change to make this a little easier to comprehend. llvm-svn: 18888 2004-12-13 09:37:41 +00:00			`[AC_CACHE_CHECK([],[llvm_cv_has_bison],[AC_PROG_YACC()])`
Individual autoconf function broken out of acincludes.m4. This change per the recommended style guide for autoconf and so that individual autoconf functions can more easily be shared across projects. llvm-svn: 16223 2004-09-07 06:56:14 +00:00			`if test "$YACC" != "bison -y"; then`
For PR738: Demote check for bison from error to warning and make sure that the makefile can handle an empty definition for BISON variable. llvm-svn: 29861 2006-08-24 22:41:20 +00:00			`AC_SUBST(BISON,[])`
			`AC_MSG_WARN([bison not found, can't rebuild grammars])`
Individual autoconf function broken out of acincludes.m4. This change per the recommended style guide for autoconf and so that individual autoconf functions can more easily be shared across projects. llvm-svn: 16223 2004-09-07 06:56:14 +00:00			`else`
For PR738: Demote check for bison from error to warning and make sure that the makefile can handle an empty definition for BISON variable. llvm-svn: 29861 2006-08-24 22:41:20 +00:00			`AC_SUBST(BISON,[bison])`
Minor syntactical change to make this a little easier to comprehend. llvm-svn: 18888 2004-12-13 09:37:41 +00:00			`fi])`