Docs: notes on DBM library changeovers

[exim.git] / src / scripts / lookups-Makefile

diff --git a/src/scripts/lookups-Makefile b/src/scripts/lookups-Makefile
index d2caf70c85a85692958d0da7b4a4afca08c9b02b..8dcac585b086ebfd2ca73055aaa4efba2e4f18dc 100755 (executable)
--- a/src/scripts/lookups-Makefile
+++ b/src/scripts/lookups-Makefile
@@ -1,5 +1,8 @@
 #! /bin/sh
 
+# Copyright (c) The Exim Maintainers 1995 - 2021
+# SPDX-License-Identifier: GPL-2.0-or-later
+
 # We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile
 
 # We always re-exec ourselves at least once, because it's the cleanest and
@@ -24,6 +27,22 @@ then
   _XPG=1
   export _XPG
 
+  # We need the _right_ tr, so must do that first; but if a shell which
+  # we're more confident is sane is available, let's try that.  Mostly,
+  # the problem is that "local" is not actually in "the" standard, it's
+  # just in every not-insane shell.  Though arguably, there are no shells
+  # with POSIX-ish syntax which qualify as "not insane".
+  for b in /bin/dash /bin/bash /usr/local/bin/bash
+  do
+    if [ -x "$b" ]
+    then
+      SHELL="$b"
+      break
+    fi
+  done
+  # if we get a report of a system with zsh but not bash, we can add that
+  # to the list, but be sure to enable sh_word_split in that case.
+
   exec "$SHELL" "$0" "$@"
 fi
 
@@ -41,6 +60,16 @@ tab='        '
 LC_ALL=C
 export LC_ALL
 
+if [ -f "$defs_source" ]
+then
+  :
+  # we are happy
+else
+  echo >&2 "$0: ERROR: MISSING FILE '${defs_source}'"
+  echo >&2 "$0: SHOULD HAVE BEEN CALLED FROM scripts/Configure-Makefile"
+  exit 1
+fi
+
 # nb: do not permit leading whitespace for this, as CFLAGS_DYNAMIC is exported
 # to the lookups subdir via a line with leading whitespace which otherwise
 # matches
@@ -134,8 +163,8 @@ exec > "$target"
 sed -n "1,/$tag_marker/p" < "$input"
 
 for name_mod in \
-    CDB DBM:dbmdb DNSDB DSEARCH IBASE LSEARCH MYSQL NIS NISPLUS ORACLE \
-    PASSWD PGSQL SQLITE TESTDB WHOSON
+    CDB DBM:dbmdb DNSDB DSEARCH IBASE JSON LMDB LSEARCH MYSQL NIS NISPLUS ORACLE \
+    PASSWD PGSQL REDIS SQLITE TESTDB WHOSON
 do
   emit_module_rule $name_mod
 done
@@ -151,13 +180,8 @@ fi
 
 OBJ="${OBJ} spf.o"
 
-# Because the variable is EXPERIMENTAL_REDIS and not LOOKUP_REDIS we
-# use a different function to check for EXPERIMENTAL_* features
-# requested. Don't use the SPF method with dummy functions above.
-if want_experimental REDIS
-then
-  OBJ="${OBJ} redis.o"
-fi
+# readsock is always wanted as it implements the ${readsock } expansion
+OBJ="${OBJ} readsock.o"
 
 echo "MODS = $MODS"
 echo "OBJ = $OBJ"