configure: look for libtinfo before looking for libncurses

[kconfig-frontends] / configure.ac

diff --git a/configure.ac b/configure.ac
index 554974bde7622ec12ae27d733f572d1e07342c29..1595276a845740985dcadd00c683ab879c0707ff 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,10 @@ AS_IF(
 
 AM_INIT_AUTOMAKE([foreign])
 
+# For releases, enable silent rules, unless the user explicitly
+# disables them.
+# For the devel tree, do build with verbose output, unless user
+# explicitly enables silent rules
 AS_IF(
     [test "$(${srcdir}/scripts/version.sh --internal)" = "git"],
     [AM_SILENT_RULES],
@@ -63,7 +67,7 @@ AC_ARG_ENABLE(
         [*],   [wall_CFLAGS=""])])
 AC_SUBST([wall_CFLAGS],[${wall_CFLAGS}])
 
-# For releases, do not build with -Werror, unless the user explcitly
+# For releases, do not build with -Werror, unless the user explicitly
 # requests to build with -Werror.
 # For the devel tree, do build with -Werror by default, unless user
 # explicitly disables -Werror
@@ -215,9 +219,22 @@ AS_IF(
 AS_IF(
     [test "$need_pkgconfig" = "yes"],
     [PKG_PROG_PKG_CONFIG()])
+# Look for `lex'. If it cannot be found, autoconf sets $LEX to ':'.
 AC_PROG_LEX
+AS_IF(
+    [test "$LEX" = ":"],
+    [AC_MSG_ERROR([can not find a lexer generator (such as lex or flex)])])
 AC_SUBST([AM_LFLAGS], ["-L -P zconf"])
+# Look for `yacc'. If it cannot be found, autoconf sets $YACC to 'yacc'.
 AC_PROG_YACC
+AS_IF(
+    [test "$YACC" = "yacc"],
+    [AC_CHECK_PROGS(
+        [YACC_IN_PATH],
+        [yacc])]
+     AS_IF(
+        [test -z "$YACC_IN_PATH"],
+        [AC_MSG_ERROR([can not find a parser generator (such as yacc or bison)])]))
 AC_SUBST([AM_YFLAGS], ["-t -l -p zconf"])
 
 #----------------------------------------
@@ -261,7 +278,9 @@ AS_IF(
      LIBS=
      AC_CHECK_HEADERS(
         [ncursesw/curses.h ncurses/ncurses.h ncurses/curses.h ncurses.h curses.h],
-        [CURSES_LOC=$ac_header; ncurses_mconf_CPPFLAGS=-DCURSES_LOC=\\\"$ac_header\\\"; break])
+        [CURSES_LOC=$ac_header
+         ncurses_mconf_CPPFLAGS=-DCURSES_LOC=\\\"$ac_header\\\"
+         break # Stupid syntax-coloring in vim: "])
      AS_IF(
         [test -z "$CURSES_LOC"],
         [AS_IF(
@@ -271,6 +290,10 @@ AS_IF(
      AS_CASE(
         [$CURSES_LOC],
         [ncursesw/*],[ncurses_mconf_CPPFLAGS="$ncurses_mconf_CPPFLAGS -DNCURSES_WIDECHAR=1"])
+     AC_SEARCH_LIBS(
+        [setupterm],
+        [tinfo],
+        [break])
      AC_SEARCH_LIBS(
         [initscr],
         [ncursesw ncurses curses],
@@ -281,10 +304,6 @@ AS_IF(
             [test "$need_curses" = "yes"],
             [AC_MSG_ERROR([could not find curses library (frontends: mconf/nconf)])],
             [has_curses=no])])
-     AC_SEARCH_LIBS(
-        [setupterm],
-        [tinfo],
-        [break])
      ncurses_LIBS="$LIBS"
      LIBS=$LIBS_old])