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61ec970d PH |
1 | #! /bin/sh |
2 | # $Cambridge: exim/src/scripts/Configure-Makefile,v 1.1 2004/10/06 15:07:40 ph10 Exp $ | |
3 | ||
4 | # Shell script to build Makefile in a build directory. It must be called | |
5 | # from inside the directory. It does its own checking of when to rebuild; it | |
6 | # just got too horrendous to get it right in "make", because of the optionally | |
7 | # existing configuration files. | |
8 | ||
9 | ||
10 | # First off, get the OS type, and check that there is a make file for it. | |
11 | ||
12 | ostype=`../scripts/os-type -generic` || exit 1 | |
13 | ||
14 | if [ ! -r ../OS/Makefile-$ostype ] ; then | |
15 | echo "" | |
16 | echo "*** Sorry - operating system $ostype is not supported" | |
17 | echo "*** See OS/Makefile-* for supported systems" 1>&2 | |
18 | echo "" | |
19 | exit 1 | |
20 | fi | |
21 | ||
22 | # We also need the architecture type, in order to test for any architecture- | |
23 | # specific configuration files. | |
24 | ||
25 | archtype=`../scripts/arch-type` || exit 1 | |
26 | ||
27 | # Now test for either the non-existence of Makefile, or for any of its | |
28 | # components being newer. Note that the "newer" script gives the right | |
29 | # answer (for our purposes) when the first file is non-existent. | |
30 | ||
31 | editme=../Local/Makefile | |
32 | rebuild=yes | |
33 | ||
34 | if [ -f Makefile ] ; then | |
35 | rebuild=no | |
36 | if ../scripts/newer $editme Makefile || \ | |
37 | ../scripts/newer $editme-$ostype Makefile || \ | |
38 | ../scripts/newer $editme-$archtype Makefile || \ | |
39 | ../scripts/newer $editme-$ostype-$archtype Makefile || \ | |
40 | ../scripts/newer ../scripts/Configure-Makefile Makefile || \ | |
41 | ../scripts/newer ../OS/Makefile-Base Makefile || \ | |
42 | ../scripts/newer ../OS/Makefile-Default Makefile | |
43 | then | |
44 | rebuild=yes | |
45 | fi | |
46 | fi | |
47 | ||
48 | # If the "build" variable is set it means that a build name was explicitly | |
49 | # given. Arrange to pick up a build-specific configuration file. | |
50 | ||
51 | if [ "X$build" != "X" ] ; then | |
52 | mfb=Local/Makefile-$build | |
53 | if ../scripts/newer $editme-$build Makefile ; then | |
54 | rebuild=yes | |
55 | fi | |
56 | else | |
57 | mfb= | |
58 | fi | |
59 | ||
60 | ||
61 | # If Makefile is up-to-date, no need to rebuild it. | |
62 | ||
63 | if [ $rebuild = no ] ; then | |
64 | echo "\`Makefile' is up to date." | |
65 | echo " " | |
66 | exit | |
67 | fi | |
68 | ||
69 | # Makefile needs to be rebuilt in the current directory by joining | |
70 | # the generic default makefile, the OS base makefile, and then local | |
71 | # generic, OS-specific, architecture-specific, and OS+architecture-specific | |
72 | # makefiles, if they exist. These files all contain macro definitions, with | |
73 | # later definitions overriding earlier ones. Make a temporary file first, in | |
74 | # case things go wrong. A second temporary is needed for sorting out the | |
75 | # default Perl stuff. Use short macro names to save typing. | |
76 | ||
77 | mf=Makefile | |
78 | mft=$mf-t | |
79 | mftt=$mf-tt | |
80 | ||
81 | # Ensure the temporary does not exist and start the new one by setting | |
82 | # the OSTYPE and ARCHTYPE variables. | |
83 | ||
84 | rm -f $mft $mftt | |
85 | (echo "OSTYPE=$ostype"; echo "ARCHTYPE=$archtype"; echo "") > $mft || exit 1 | |
86 | ||
87 | # Now concatenate the files to the temporary file. Copy the files using sed to | |
88 | # remove comments, blank lines, and trailing white space. | |
89 | ||
90 | # BEWARE: a tab character is needed in the sed command below. It has had | |
91 | # a nasty tendency to get lost in the past, causing a problem if a tab has | |
92 | # actually been present in one of the files. Use a variable to hold a space | |
93 | # and a tab to keep the tab in one place. | |
94 | ||
95 | st=' ' | |
96 | ||
97 | for f in OS/Makefile-Default \ | |
98 | OS/Makefile-$ostype \ | |
99 | Local/Makefile \ | |
100 | Local/Makefile-$ostype \ | |
101 | Local/Makefile-$archtype \ | |
102 | Local/Makefile-$ostype-$archtype \ | |
103 | $mfb | |
104 | do if test -r ../$f | |
105 | then echo "# From $f" | |
106 | sed "/^#/d;/^[$st]*\$/d;s/[$st]*\$//" ../$f || exit 1 | |
107 | echo "# End of $f" | |
108 | echo "" | |
109 | fi | |
110 | done >> $mft || exit 1 | |
111 | ||
112 | # See if there is a definition of EXIM_PERL in what we have built so far. | |
113 | # If so, run Perl to find the default values for PERL_CC, PERL_CCOPTS, | |
114 | # and PERL_LIBS. These need to be put at the top of the Makefile, so we rename | |
115 | # what we have so far and then copy it afterwards. Use the value of PERL_COMMAND | |
116 | # if it has been defined. | |
117 | ||
118 | EXIM_PERL=`grep EXIM_PERL $mft` | |
119 | ||
120 | PERL_COMMAND=`grep PERL_COMMAND $mft | sed -e "\\$!d;s/^[$st]*PERL_COMMAND[$st]*=[$st]*//"` | |
121 | if [ "${PERL_COMMAND}" = "" ] ; then | |
122 | PERL_COMMAND='perl' | |
123 | fi | |
124 | ||
125 | if [ "${EXIM_PERL}" != "" ] ; then | |
126 | testperl=`$PERL_COMMAND --version` | |
127 | if [ "$testperl" = "" ] ; then | |
128 | echo "*** EXIM_PERL is set, but '$PERL_COMMAND --version' failed" | |
129 | exit 1 | |
130 | fi | |
131 | ||
132 | mv $mft $mftt | |
133 | echo "PERL_CC=`$PERL_COMMAND -MConfig -e 'print $Config{cc}'`" >>$mft | |
134 | echo "PERL_CCOPTS=`$PERL_COMMAND -MExtUtils::Embed -e ccopts`" >>$mft | |
135 | echo "PERL_LIBS=`$PERL_COMMAND -MExtUtils::Embed -e ldopts`" >>$mft | |
136 | echo "" >>$mft | |
137 | cat $mftt >> $mft | |
138 | rm -f $mftt | |
139 | fi | |
140 | ||
141 | # Record the build variable in the Makefile. | |
142 | ||
143 | echo "build=$build" >>$mft | |
144 | echo "" >>$mft | |
145 | ||
146 | # Finally, join on the generic base make file, which contains the actual | |
147 | # rules and stuff. | |
148 | ||
149 | cat ../OS/Makefile-Base >> $mft || exit 1 | |
150 | ||
151 | # If the new makefile is the same as the existing one, say so, and just | |
152 | # update the timestamp. Otherwise remove the old and install the new. | |
153 | ||
154 | if [ -s $mf ] && cmp -s $mft $mf | |
155 | then echo ">>> rebuilt $mf unchanged" | |
156 | echo " " | |
157 | touch $mf || exit | |
158 | rm -f $mft | |
159 | elif rm -f $mf | |
160 | mv $mft $mf | |
161 | then echo ">>> New $mf installed" | |
162 | echo '>>> Use "make makefile" if you need to force rebuilding of the makefile' | |
163 | echo " " | |
164 | else echo " " | |
165 | echo "*** Failed to install $mf - see $mft" | |
166 | echo " " | |
167 | exit 1; | |
168 | fi | |
169 | ||
170 | # End of Configure-Makefile |