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| author | Paul Eggert <eggert@cs.ucla.edu> | 2013-08-24 18:22:22 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2013-08-24 18:22:44 -0700 |
| commit | b5e27aa2625c1f84ea1ee75fe74374341664a759 (patch) | |
| tree | ffa4156841521b5f7859ba9c8b1009f2cefcc42e | |
| parent | 0149d39e6e5cb4384c07d92c00908d0099d5e009 (diff) | |
| download | bison-b5e27aa2625c1f84ea1ee75fe74374341664a759.tar.gz | |
build: don't require flex for ordinary builds
* configure.ac (LEX): Don't fail if this is lex, as flex is not
required for ordinary builds. Instead, issue a warning and
substitute a no-op LEX. Reported by Michael Felt in
<http://lists.gnu.org/archive/html/bug-bison/2013-08/msg00009.html>.
| -rw-r--r-- | configure.ac | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index f7319a15..992e2033 100644 --- a/configure.ac +++ b/configure.ac @@ -175,7 +175,10 @@ AC_SUBST([YACC_LIBRARY]) # Checks for programs. AM_MISSING_PROG([DOT], [dot]) AC_PROG_LEX -$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required]) +$LEX_IS_FLEX || test "X$LEX" = X: || { + AC_MSG_WARN([bypassing lex because flex is required]) + LEX=: +} AC_PROG_YACC AC_PROG_RANLIB AC_PROG_GNU_M4 |