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| author | Dave Davenport <qball@gmpclient.org> | 2020-09-03 21:08:17 +0200 |
|---|---|---|
| committer | Dave Davenport <qball@gmpclient.org> | 2020-09-03 21:08:17 +0200 |
| commit | 5deac0a697e3e6b4ee9b06f9fed8944c7d5fdacb (patch) | |
| tree | ed14c1f1e92306fa41a7b12c9cb10a79e4054505 | |
| parent | e4e59b99ea5de1f73c990499c9e02b2484042cb2 (diff) | |
Try to improve bison check so it works on bsd
| -rw-r--r-- | configure.ac | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 7f366d05..ecc3a884 100644 --- a/configure.ac +++ b/configure.ac @@ -10,7 +10,27 @@ dnl --------------------------------------------------------------------- AC_PROG_LEX([flex]) AC_PROG_YACC -AS_IF([test "x${YACC}" != "xbison -y" ], [AC_MSG_ERROR( "Failed to find bison")]) + +AC_DEFUN([AX_PROG_BISON], [ + AC_REQUIRE([AC_PROG_YACC]) + AC_REQUIRE([AC_PROG_EGREP]) + + AC_CACHE_CHECK([if bison is the parser generator],[ax_cv_prog_bison],[ + AS_IF([$YACC --version 2>/dev/null | $EGREP -q '^bison '], + [ax_cv_prog_bison=yes], [ax_cv_prog_bison=no]) + ]) + AS_IF([test "$ax_cv_prog_bison" = "yes"], [ + dnl replace the yacc-compatible compiler with the real bison, as + dnl otherwise autoconf limits us to the POSIX yacc. + dnl We also change the generated filename to the old one, so that + dnl automake's ylwrap can deal with it. + YACC="${YACC% -y} -o y.tab.c" + ] m4_ifnblank([$1], [[$1]]), + m4_ifnblank([$2], [[$2]]) + ) +]) + +AX_PROG_BISON([],[AC_MSG_ERROR("Failed to find bison")]) m4_include([m4/ax_prog_flex_version.m4]) m4_include([m4/ax_compare_version.m4]) |