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Teach Configure that icc is not gcc
[metaconfig.git] / U / perl / gccvers.U
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1?RCS: $Id$
2?RCS:
3?RCS: Copyright (c) 2000, Jarkko Hietaniemi
5dcc3580 4?RCS:
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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 3.0.
10?RCS:
4087c32b 11?MAKE:gccversion gccosandvers gccansipedantic: cat cpp rm +cc \
0f00356b 12 Mcc Myread Guess Options Oldconfig Loc osname osvers run
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13?MAKE: -pick add $@ %<
14?S:gccversion:
5c7d75a6 15?S: If GNU cc (gcc) is used, this variable holds '1' or '2' to
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16?S: indicate whether the compiler is version 1 or 2. This is used in
17?S: setting some of the default cflags. It is set to '' if not gcc.
18?S:.
5fc71efb 19?S:gccosandvers:
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20?S: If GNU cc (gcc) is used, this variable holds the operating system
21?S: and version used to compile gcc. It is set to '' if not gcc,
fcc4de7b 22?S: or if nothing useful can be parsed as the os version.
5fc71efb 23?S:.
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24?S:gccansipedantic:
25?S: If GNU cc (gcc) is used, this variable will enable (if set) the
26?S: -ansi and -pedantic ccflags for building core files (through
27?S: cflags script). (See Porting/pumpkin.pod for full description).
28?S:.
559accf2 29?T:gccshortvers
b2fa012f 30?T:incdir
bf7497fb 31?T:warn
fd1a35d0 32?D:gccversion=''
4087c32b 33?D:gccansipedantic=''
fd1a35d0 34?LINT:change cpp
77506990 35?LINT:extern ccflags
fd1a35d0 36?LINT:extern ldflags
b2fa012f 37?LINT:extern locincpth
3bb42500 38?LINT:extern ccname
7ab230d2 39?LINT:change ccflags
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40?LINT:change ccname
41?LINT:change locincpth
5c7d75a6 42?X: Check if they have gcc in any guise.
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43echo " "
44echo "Checking for GNU cc in disguise and/or its version number..." >&4
0f00356b 45$cat >try.c <<EOM
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46#include <stdio.h>
47int main() {
a9c4d48e 48#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
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49#ifdef __VERSION__
50 printf("%s\n", __VERSION__);
51#else
52 printf("%s\n", "1");
53#endif
54#endif
a4ad2925 55 return(0);
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56}
57EOM
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58if $cc -o try $ccflags $ldflags try.c; then
59 gccversion=`$run ./try`
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60 case "$gccversion" in
61 '') echo "You are not using GNU cc." ;;
62 *) echo "You are using GNU cc $gccversion."
5c7d75a6 63 ccname=gcc
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64 ;;
65 esac
66else
67 echo " "
68 echo "*** WHOA THERE!!! ***" >&4
69 echo " Your C compiler \"$cc\" doesn't seem to be working!" >&4
70?X: using -K will prevent aborting--maybe they're cross compiling?
71 case "$knowitall" in
72 '')
73 echo " You'd better start hunting for one and let me know about it." >&4
74 exit 1
75 ;;
76 esac
77fi
0f00356b 78$rm -f try try.*
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79case "$gccversion" in
801*) cpp=`./loc gcc-cpp $cpp $pth` ;;
81esac
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82case "$gccversion" in
83'') gccosandvers='' ;;
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84*) gccshortvers=`echo "$gccversion"|sed 's/ .*//'`
85 gccosandvers=`$cc -v 2>&1|grep '/specs$'|sed "s!.*/[^-/]*-[^-/]*-\([^-/]*\)/$gccshortvers/specs!\1!"`
86 gccshortvers=''
5fc71efb 87 case "$gccosandvers" in
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88 $osname) gccosandvers='' ;; # linux gccs seem to have no linux osvers, grr
89 $osname$osvers) ;; # looking good
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90 $osname*) cat <<EOM >&4
91
92*** WHOA THERE!!! ***
93
94 Your gcc has not been compiled for the exact release of
95 your operating system ($gccosandvers versus $osname$osvers).
96
97 In general it is a good idea to keep gcc synchronized with
98 the operating system because otherwise serious problems
99 may ensue when trying to compile software, like Perl.
100
101 I'm trying to be optimistic here, though, and will continue.
102 If later during the configuration and build icky compilation
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103 problems appear (headerfile conflicts being the most common
104 manifestation), I suggest reinstalling the gcc to match
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105 your operating system release.
106
107EOM
108 ;;
1c7fa146 109 *) gccosandvers='' ;; # failed to parse, better be silent
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110 esac
111 ;;
112esac
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113case "$ccname" in
114'') ccname="$cc" ;;
115esac
fd1a35d0 116
a7eb1db8 117# gcc 3.* complain about adding -Idirectories that they already know about,
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118# so we will take those off from locincpth.
119case "$gccversion" in
1203*)
121 echo "main(){}">try.c
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122 for incdir in $locincpth; do
123 warn=`$cc $ccflags -I$incdir -c try.c 2>&1 | \
5c7d75a6 124 grep '^c[cp]p*[01]: warning: changing search order '`
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125 if test "X$warn" != X; then
126 locincpth=`echo " $locincpth " | sed "s! $incdir ! !"`
127 fi
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128 done
129 $rm -f try try.*
130esac
7ab230d2 131