1#! /bin/sh
2
3# We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile
4
5# We always re-exec ourselves at least once, because it's the cleanest and
6# most portable way to turn on various features we expect of POSIX sh.
7if [ -z "$EXIM_LOOKUP_MAKEFILE_ADJUSTED" ]
8then
9  SHELL=/bin/sh
10  EXIM_LOOKUP_MAKEFILE_ADJUSTED=yes
11  export EXIM_LOOKUP_MAKEFILE_ADJUSTED
12
13  # Solaris sh and tr are problematic until we get xpg4 variants
14  if [ -x /usr/xpg4/bin/sh ]
15  then
16    PATH="/usr/xpg4/bin:$PATH"
17    export PATH
18    SHELL=/usr/xpg4/bin/sh
19    export SHELL
20  fi
21
22  # IRIX uses /bin/ksh for sh but in a compatibility mode unless $_XPG == 1,
23  # where said compatibility mode disables $(...)
24  _XPG=1
25  export _XPG
26
27  # We need the _right_ tr, so must do that first; but if a shell which
28  # we're more confident is sane is available, let's try that.  Mostly,
29  # the problem is that "local" is not actually in "the" standard, it's
30  # just in every not-insane shell.  Though arguably, there are no shells
31  # with POSIX-ish syntax which qualify as "not insane".
32  for b in /bin/dash /bin/bash /usr/local/bin/bash
33  do
34    if [ -x "$b" ]
35    then
36      SHELL="$b"
37      break
38    fi
39  done
40  # if we get a report of a system with zsh but not bash, we can add that
41  # to the list, but be sure to enable sh_word_split in that case.
42
43  exec "$SHELL" "$0" "$@"
44fi
45
46input=lookups/Makefile.predynamic
47target=lookups/Makefile.postdynamic
48defs_source=Makefile-t
49tag_marker='MAGIC-TAG-MODS-OBJ-RULES-GO-HERE'
50
51tab='	'
52
53# We rely on tr(1) for translating case below.  Some people export
54# values of LC_CTYPE and LC_COLLATE which apparently break our assumptions.
55# We're a script expecting certain output based on known inputs and not dealing
56# with UTF8, so we should be safe doingthis:
57LC_ALL=C
58export LC_ALL
59
60if [ -f "$defs_source" ]
61then
62  :
63  # we are happy
64else
65  echo >&2 "$0: ERROR: MISSING FILE '${defs_source}'"
66  echo >&2 "$0: SHOULD HAVE BEEN CALLED FROM scripts/Configure-Makefile"
67  exit 1
68fi
69
70# nb: do not permit leading whitespace for this, as CFLAGS_DYNAMIC is exported
71# to the lookups subdir via a line with leading whitespace which otherwise
72# matches
73if grep -q "^CFLAGS_DYNAMIC[ $tab?:]*=" "$defs_source"
74then
75  # we have a definition, we're good to go
76  echo >&2 ">>> Creating lookups/Makefile for building dynamic modules"
77  enable_dynamic=yes
78else
79  echo >&2 ">>> Creating lookups/Makefile without dynamic module support"
80  enable_dynamic=''
81  # We always do something now, since there should always be a lookup,
82  # and now we need to run in order to put the OBJ=$(OBJ)+ rules in.  So we
83  # continue on.
84fi
85
86# For the want_ checks, we need to let the user override values from the make
87# command-line, not just check the Makefile.
88
89want_dynamic() {
90  local dyn_name="$1"
91  local re="LOOKUP_${dyn_name}[ $tab]*=[ $tab]*2"
92  env | grep -q "^$re"
93  if [ $? -eq 0 ]; then return 0; fi
94  grep -q "^[ $tab]*$re" "$defs_source"
95}
96
97want_at_all() {
98  local want_name="$1"
99  local re="LOOKUP_${want_name}[ $tab]*=[ $tab]*."
100  env | grep -q "^$re"
101  if [ $? -eq 0 ]; then return 0; fi
102  grep -q "^[ $tab]*$re" "$defs_source"
103}
104
105# Adapted want_at_all above to work for EXPERIMENTAL features
106want_experimental() {
107  local want_name="$1"
108  local re="EXPERIMENTAL_${want_name}[ $tab]*=[ $tab]*."
109  env | grep -q "^$re"
110  if [ $? -eq 0 ]; then return 0; fi
111  grep -q "^[ $tab]*$re" "$defs_source"
112}
113
114# The values of these variables will be emitted into the Makefile.
115
116MODS=""
117OBJ=""
118
119emit_module_rule() {
120  local lookup_name="$1"
121  local mod_name pkgconf
122  if [ "${lookup_name%:*}" = "$lookup_name" ]
123  then
124    # Square brackets are redundant but benign for POSIX compliant tr,
125    # however Solaris /usr/bin/tr requires them. Sometimes Solaris
126    # gets installed without a complete set of xpg4 tools, sigh.
127    mod_name=$(echo $lookup_name | tr [A-Z] [a-z])
128  else
129    mod_name="${lookup_name#*:}"
130    lookup_name="${lookup_name%:*}"
131  fi
132
133  if want_dynamic "$lookup_name"
134  then
135    if [ -z "$enable_dynamic" ]; then
136      echo >&2 "Missing CFLAGS_DYNAMIC prevents building dynamic $lookup_name"
137      exit 1
138    fi
139    MODS="${MODS} ${mod_name}.so"
140    pkgconf=$(grep "^LOOKUP_${lookup_name}_PC" "$defs_source")
141    if [ $? -eq 0 ]; then
142      pkgconf=$(echo $pkgconf | sed 's/^.*= *//')
143      echo "LOOKUP_${mod_name}_INCLUDE = $(pkg-config --cflags $pkgconf)"
144      echo "LOOKUP_${mod_name}_LIBS = $(pkg-config --libs $pkgconf)"
145    else
146      grep "^LOOKUP_${lookup_name}_" "$defs_source"
147      echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
148      echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
149    fi
150  elif want_at_all "$lookup_name"
151  then
152    OBJ="${OBJ} ${mod_name}.o"
153  fi
154}
155
156rm -f "$target"
157exec 5>&1
158exec > "$target"
159
160sed -n "1,/$tag_marker/p" < "$input"
161
162for name_mod in \
163    CDB DBM:dbmdb DNSDB DSEARCH IBASE JSON LSEARCH MYSQL NIS NISPLUS ORACLE \
164    PASSWD PGSQL REDIS SQLITE TESTDB WHOSON
165do
166  emit_module_rule $name_mod
167done
168
169if want_at_all LDAP
170then
171  OBJ="${OBJ} ldap.o"
172fi
173
174# Because the variable is EXPERIMENTAL_SPF and not LOOKUP_SPF we
175# always include spf.o and compile a dummy if EXPERIMENTAL_SPF is not
176# defined.
177
178OBJ="${OBJ} spf.o"
179
180if want_experimental LMDB
181then
182  OBJ="${OBJ} lmdb.o"
183fi
184
185# readsock is always wanted as it implements the ${readsock } expansion
186OBJ="${OBJ} readsock.o"
187
188echo "MODS = $MODS"
189echo "OBJ = $OBJ"
190
191sed -n "/$tag_marker/,\$p" < "$input"
192
193exec >&5
194
195# Configure-Makefile will move $target into place
196
197# vim: set ft=sh sw=2 :
198