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1 parent 0d1c15a commit 004b831Copy full SHA for 004b831
configure.in
@@ -296,6 +296,16 @@ dnl ---------------------------------------------------------------------------
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AC_PROG_YACC
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AM_PROG_LEX
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+# test whether they have been really found
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+# (by default if not found autoconf will use a stub)
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+
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+if test x"$LEX" != "xflex" -a x"$LEX" != "xlex" ; then
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+ AC_MSG_ERROR("Lex/Flex is not available!")
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+fi
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+if test x"$YACC" != "xbison" -a x"$YACC" != "xyacc" -a x"$YACC" != "xbison -y" ; then
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+ AC_MSG_ERROR("Yacc/Bison is not available!")
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dnl ---------------------------------------------------------------------------
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dnl SPIT plugin
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