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llvm-6502/autoconf/m4/flex.m4
Reid Spencer 491f6812ef 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16223 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-07 06:56:14 +00:00

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#
# Check for FLEX.
#
# This macro verifies that flex is installed. If successful, then
# 1) $LEX is set to "flex" (to emulate lex calls)
# 2) BISON is set to bison
AC_DEFUN([AC_PROG_FLEX],
[AC_CACHE_CHECK(,
ac_cv_has_flex,
[AC_PROG_LEX()
])
if test "$LEX" != "flex"; then
AC_MSG_ERROR([flex not found but required])
else
AC_SUBST(FLEX,[flex],[location of flex])
fi
])