Skip Bison api.token.raw probe if Bison is not found.

Printing the api.token.raw probe when Bison was not found at all gives
strange configure output, let's just make the whole check conditional.

diff --git a/configure.ac b/configure.ac
index 6d4bf6cd3a8ff0c520105bd7665316b749ab593c..4e9262ea33684d30963580bc4aaa37b377d2c4fa 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -85,9 +85,8 @@ AS_IF([test x"$dx_cv_bison_warn_no_deprecated" = x"yes"],
   [AS_VAR_APPEND([BISON_COMPAT], ["${BISON_COMPAT:+ }-Wno-deprecated"])])
 AC_SUBST([BISON_COMPAT])
 
-AS_IF([test x"$dx_cv_bison_define_cmdline" != x"yes"],
-  [dx_cv_bison_api_token_raw=no])
-AC_CACHE_CHECK([whether $BISON supports api.token.raw],
+AS_CASE([$dx_cv_bison_define_cmdline], [yes],
+[AC_CACHE_CHECK([whether $BISON supports api.token.raw],
   [dx_cv_bison_api_token_raw], [dx_cv_bison_api_token_raw=no
 cat >conftest.y <<'EOF'
 %token T_TEST
@@ -102,8 +101,8 @@ AS_IF([$BISON --define api.token.raw conftest.y >&AS_MESSAGE_LOG_FD 2>&1],
 [AC_COMPUTE_INT([testval], [T_TEST], [#include "conftest.tab.c"
 ])
 AS_IF([test "$testval" -lt 256], [dx_cv_bison_api_token_raw=yes])])])
-AS_IF([test x"$dx_cv_bison_api_token_raw" = x"yes"],
-  [AS_VAR_APPEND([BISON_COMPAT], [" --define api.token.raw"])])
+AS_CASE([$dx_cv_bison_api_token_raw], [yes],
+  [AS_VAR_APPEND([BISON_COMPAT], [" --define api.token.raw"])])])
 
 AH_TOP([#include <conf_pre.h>])
 AH_BOTTOM([#include <conf_post.h>])