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Really ensure a Yacc alternative is installed at build time

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AC_PROG_YACC falls back to YACC = "yacc" if bison or byacc are not
found, but it does not mean it is present.

Closes #294
This commit is contained in:
Marc Dequènes (Duck) 2013-10-19 11:53:13 +02:00
parent 8b98c3746e
commit 1c3ef1d360
1 changed files with 7 additions and 0 deletions
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7
configure.ac
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@ -12,6 +12,13 @@ AM_PROG_CC_C_O
AC_PROG_INSTALL
AM_PROG_LEX
AC_PROG_YACC
# AC_PROG_YACC falls back to YACC = "yacc" if bison or byacc are not found, but it does not mean it is present
AS_IF([test x"$YACC" = "xyacc"], [
AC_CHECK_PROG([YACC_EXISTS], [yacc], [yes], [no])
AS_IF([test x"$YACC_EXISTS" != xyes], [
YACC=${am_missing_run}yacc
])
])
# Checks for header files.
AC_FUNC_ALLOCA