Portability fix for Solaris without xpg4 utilities

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

diff --git a/src/scripts/lookups-Makefile b/src/scripts/lookups-Makefile
index 7f45eea0323f2d6a03ea246d0cec6396b3ec7ed8..d2caf70c85a85692958d0da7b4a4afca08c9b02b 100755 (executable)
--- a/src/scripts/lookups-Makefile
+++ b/src/scripts/lookups-Makefile
@@ -2,18 +2,34 @@
 
 # We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile
 
-if [ -x /usr/xpg4/bin/sh ] && [ -z "$EXIM_BLOCK_XPG4_LOOP" ]
+# We always re-exec ourselves at least once, because it's the cleanest and
+# most portable way to turn on various features we expect of POSIX sh.
+if [ -z "$EXIM_LOOKUP_MAKEFILE_ADJUSTED" ]
 then
-  EXIM_BLOCK_XPG4_LOOP=yes
-  export EXIM_BLOCK_XPG4_LOOP
-  PATH="/usr/xpg4/bin:$PATH"
-  export PATH
-  exec /usr/xpg4/bin/sh "$0" "$@"
+  SHELL=/bin/sh
+  EXIM_LOOKUP_MAKEFILE_ADJUSTED=yes
+  export EXIM_LOOKUP_MAKEFILE_ADJUSTED
+
+  # Solaris sh and tr are problematic until we get xpg4 variants
+  if [ -x /usr/xpg4/bin/sh ]
+  then
+    PATH="/usr/xpg4/bin:$PATH"
+    export PATH
+    SHELL=/usr/xpg4/bin/sh
+    export SHELL
+  fi
+
+  # IRIX uses /bin/ksh for sh but in a compatibility mode unless $_XPG == 1,
+  # where said compatibility mode disables $(...)
+  _XPG=1
+  export _XPG
+
+  exec "$SHELL" "$0" "$@"
 fi
 
 input=lookups/Makefile.predynamic
-target=lookups/Makefile
-defs_source=Makefile
+target=lookups/Makefile.postdynamic
+defs_source=Makefile-t
 tag_marker='MAGIC-TAG-MODS-OBJ-RULES-GO-HERE'
 
 tab='  '
@@ -28,20 +44,19 @@ export LC_ALL
 # 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
-if grep -q "^CFLAGS_DYNAMIC[ $tab]*=" "$defs_source"
+if grep -q "^CFLAGS_DYNAMIC[ $tab?:]*=" "$defs_source"
 then
   # we have a definition, we're good to go
+  echo >&2 ">>> Creating lookups/Makefile for building dynamic modules"
   enable_dynamic=yes
 else
-  echo >&2 "Missing CFLAGS_DYNAMIC inhibits building dynamic module lookup"
+  echo >&2 ">>> Creating lookups/Makefile without dynamic module support"
   enable_dynamic=''
   # We always do something now, since there should always be a lookup,
   # and now we need to run in order to put the OBJ=$(OBJ)+ rules in.  So we
   # continue on.
 fi
 
-tmp="$target.t"
-
 # For the want_ checks, we need to let the user override values from the make
 # command-line, not just check the Makefile.
 
@@ -61,6 +76,15 @@ want_at_all() {
   grep -q "^[ $tab]*$re" "$defs_source"
 }
 
+# Adapted want_at_all above to work for EXPERIMENTAL features
+want_experimental() {
+  local want_name="$1"
+  local re="EXPERIMENTAL_${want_name}[ $tab]*=[ $tab]*."
+  env | grep -q "^$re"
+  if [ $? -eq 0 ]; then return 0; fi
+  grep -q "^[ $tab]*$re" "$defs_source"
+}
+
 # The values of these variables will be emitted into the Makefile.
 
 MODS=""
@@ -68,10 +92,13 @@ OBJ=""
 
 emit_module_rule() {
   local lookup_name="$1"
-  local mod_name
+  local mod_name pkgconf
   if [ "${lookup_name%:*}" = "$lookup_name" ]
   then
-    mod_name=$(echo $lookup_name | tr A-Z a-z)
+    # Square brackets are redundant but benign for POSIX compliant tr,
+    # however Solaris /usr/bin/tr requires them. Sometimes Solaris
+    # gets installed without a complete set of xpg4 tools, sigh.
+    mod_name=$(echo $lookup_name | tr [A-Z] [a-z])
   else
     mod_name="${lookup_name#*:}"
     lookup_name="${lookup_name%:*}"
@@ -80,21 +107,29 @@ emit_module_rule() {
   if want_dynamic "$lookup_name"
   then
     if [ -z "$enable_dynamic" ]; then
-      echo >&2 "Inhibited dynamic modules prevents building dynamic $lookup_name"
+      echo >&2 "Missing CFLAGS_DYNAMIC prevents building dynamic $lookup_name"
       exit 1
     fi
     MODS="${MODS} ${mod_name}.so"
-    grep "^LOOKUP_${lookup_name}_" "$defs_source"
-    echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
-    echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
+    pkgconf=$(grep "^LOOKUP_${lookup_name}_PC" "$defs_source")
+    if [ $? -eq 0 ]; then
+      pkgconf=$(echo $pkgconf | sed 's/^.*= *//')
+      echo "LOOKUP_${mod_name}_INCLUDE = $(pkg-config --cflags $pkgconf)"
+      echo "LOOKUP_${mod_name}_LIBS = $(pkg-config --libs $pkgconf)"
+    else
+      grep "^LOOKUP_${lookup_name}_" "$defs_source"
+      echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
+      echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
+    fi
   elif want_at_all "$lookup_name"
   then
     OBJ="${OBJ} ${mod_name}.o"
   fi
 }
 
+rm -f "$target"
 exec 5>&1
-exec > "$tmp"
+exec > "$target"
 
 sed -n "1,/$tag_marker/p" < "$input"
 
@@ -116,13 +151,21 @@ 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
+
 echo "MODS = $MODS"
 echo "OBJ = $OBJ"
 
 sed -n "/$tag_marker/,\$p" < "$input"
 
 exec >&5
-mv "$tmp" "$target"
 
+# Configure-Makefile will move $target into place
 
 # vim: set ft=sh sw=2 :