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d8875586 MBT |
1 | ?RCS: $Id: Checkcc.U 1 2006-08-24 12:32:52Z rmanfredi $ |
2 | ?RCS: | |
3 | ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi | |
4 | ?RCS: | |
5 | ?RCS: You may redistribute only under the terms of the Artistic Licence, | |
6 | ?RCS: as specified in the README file that comes with the distribution. | |
7 | ?RCS: You may reuse parts of this distribution only within the terms of | |
8 | ?RCS: that same Artistic Licence; a copy of which may be found at the root | |
9 | ?RCS: of the source tree for dist 4.0. | |
10 | ?RCS: | |
11 | ?RCS: Copyright (c) 2000, Jarkko Hietaniemi | |
12 | ?RCS: | |
13 | ?X: | |
14 | ?X: This unit produces a bit of shell code that must be dotted in order | |
15 | ?X: to make quick check on whether the current C compiler is working. | |
16 | ?X: | |
17 | ?MAKE:Checkcc ccname ccversion: Myread Warn startsh cat contains test | |
18 | ?MAKE: -pick add $@ %< | |
19 | ?S:ccname: | |
20 | ?S: This can set either by hints files or by Configure. If using | |
21 | ?S: gcc, this is gcc, and if not, usually equal to cc, unimpressive, no? | |
22 | ?S: Some platforms, however, make good use of this by storing the | |
23 | ?S: flavor of the C compiler being used here. For example if using | |
24 | ?S: the Sun WorkShop suite, ccname will be 'workshop'. | |
25 | ?S:. | |
26 | ?S:ccversion: | |
27 | ?S: This can set either by hints files or by Configure. If using | |
28 | ?S: a (non-gcc) vendor cc, this variable may contain a version for | |
29 | ?S: the compiler. | |
30 | ?S:. | |
31 | ?F:./checkcc ./trygcc !checktmp | |
32 | ?V:despair | |
33 | ?T:trygcc | |
34 | ?LINT:extern cc rm ccflags ldflags | |
35 | ?LINT:change cc ccflags | |
36 | ?LINT:usefile checktmp | |
37 | ?INIT:ccname='' | |
38 | ?INIT:ccversion='' | |
39 | : generate the trygcc script for later perusal | |
40 | cat <<EOS >trygcc | |
41 | $startsh | |
42 | EOS | |
43 | cat <<'EOSC' >>trygcc | |
44 | case "$cc" in | |
45 | '') ;; | |
46 | *) $rm -f try try.* | |
47 | $cat >try.c <<EOM | |
48 | int main(int argc, char *argv[]) { | |
49 | (void) argc; | |
50 | (void) argv; | |
51 | return 0; | |
52 | } | |
53 | EOM | |
54 | if $cc -o try $ccflags $ldflags try.c; then | |
55 | : | |
56 | else | |
57 | echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4 | |
58 | despair=yes | |
59 | trygcc=yes | |
60 | case "$cc" in | |
61 | *gcc*) trygcc=no ;; | |
62 | esac | |
63 | case "`$cc -v -c try.c 2>&1`" in | |
64 | *gcc*) trygcc=no ;; | |
65 | esac | |
66 | if $test X"$trygcc" = Xyes; then | |
67 | if gcc -o try -c try.c; then | |
68 | echo " " | |
69 | echo "You seem to have a working gcc, though." >&4 | |
70 | rp="Would you like to use it?" | |
71 | dflt=y | |
72 | if $test -f myread; then | |
73 | . ./myread | |
74 | else | |
75 | if $test -f UU/myread; then | |
76 | . ./UU/myread | |
77 | else | |
78 | echo "Cannot find myread, sorry. Aborting." >&2 | |
79 | exit 1 | |
80 | fi | |
81 | fi | |
82 | case "$ans" in | |
83 | [yY]*) cc=gcc; ccname=gcc; ccflags=''; despair=no; | |
84 | ?X: Look whether we have 'call-back units' generated by hints that would | |
85 | ?X: seemingly affect the compiling environment. | |
86 | $cat *.cbu >checktmp 2>/dev/null | |
87 | if $contains ccflags checktmp >/dev/null; then | |
88 | ./warn <<EOM | |
89 | Any previous setting of the C compiler flags has been lost. | |
90 | It may be necessary to pass -Dcc=gcc to Configure right away. | |
91 | EOM | |
92 | fi;; | |
93 | esac | |
94 | fi | |
95 | fi | |
96 | fi | |
97 | $rm -f try try.* | |
98 | ;; | |
99 | esac | |
100 | EOSC | |
101 | ||
102 | : generate the checkcc script for later perusal | |
103 | cat <<EOS >checkcc | |
104 | $startsh | |
105 | EOS | |
106 | cat <<'EOSC' >>checkcc | |
107 | case "$cc" in | |
108 | '') ;; | |
109 | *) $rm -f try try.* | |
110 | $cat >try.c <<EOM | |
111 | int main(int argc, char *argv[]) { | |
112 | (void) argc; | |
113 | (void) argv; | |
114 | return 0; | |
115 | } | |
116 | EOM | |
117 | if $cc -o try $ccflags $ldflags try.c; then | |
118 | : | |
119 | else | |
120 | if $test X"$despair" = Xyes; then | |
121 | echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4 | |
122 | fi | |
123 | $cat >&4 <<EOM | |
124 | You need to find a working C compiler. | |
125 | Either (purchase and) install the C compiler supplied by your OS vendor, | |
126 | or for a free C compiler try http://gcc.gnu.org/ | |
127 | I cannot continue any further, aborting. | |
128 | EOM | |
129 | exit 1 | |
130 | fi | |
131 | $rm -f try try.* | |
132 | ;; | |
133 | esac | |
134 | EOSC | |
135 |