Bug 139: portability fixes and documentation.

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

diff --git a/src/scripts/lookups-Makefile b/src/scripts/lookups-Makefile
new file mode 100755 (executable)
index 0000000..7069cfb
--- /dev/null
+++ b/src/scripts/lookups-Makefile
@@ -0,0 +1,85 @@
+#! /bin/sh
+
+# We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile
+
+input=lookups/Makefile.predynamic
+target=lookups/Makefile
+defs_source=Makefile
+tag_marker='MAGIC-TAG-MODS-OBJ-RULES-GO-HERE'
+
+tab='  '
+if grep -q "^LOOKUP.*=[ $tab]*2" "$defs_source"
+then
+  # we have work to do
+else
+  echo "No dynamic module loading support"
+  cp "$input" "$target"
+  exit 0
+fi
+
+if grep -q "^CFLAGS_DYNAMIC[ $tab]*=" "$defs_source"
+then
+  # we have a definition, we're good to go
+else
+  echo >&2 "Missing CFLAGS_DYNAMIC inhibits building dynamic module lookup"
+  exit 1
+fi
+
+tmp="$target.t"
+
+want_dynamic() {
+  local dyn_name="$1"
+  grep -q "^LOOKUP_${dyn_name}[ $tab]*=[ $tab]*2" "$defs_source"
+}
+
+want_at_all() {
+  local want_name="$1"
+  grep -q "^LOOKUP_${want_name}[ $tab]*=[ $tab]*." "$defs_source"
+}
+
+emit_module_rule() {
+  local lookup_name="$1"
+  local mod_name
+  if [ "${lookup_name%:*}" = "$lookup_name" ]
+  then
+    mod_name=$(echo $lookup_name | tr A-Z a-z)
+  else
+    mod_name="${lookup_name#*:}"
+    lookup_name="${lookup_name%:*}"
+  fi
+
+  if want_dynamic "$lookup_name"
+  then
+    echo "MODS += ${mod_name}.so"
+    echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
+    echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
+  elif want_at_all "$lookup_name"
+  then
+    echo "OBJ += ${mod_name}.o"
+  fi
+}
+
+exec 5>&1
+exec > "$tmp"
+
+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
+do
+  emit_module_rule $name_mod
+done
+
+if want_at_all LDAP
+then
+  echo "OBJ += ldap.o"
+fi
+
+sed -n "/$tag_marker/,\$p" < "$input"
+
+exec >&5
+mv "$tmp" "$target"
+
+
+# vim: set ft=sh sw=2 :