freshlybakedca.ke
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1#!/bin/sh
2#
3# Probe the compiler for vintage, version, etc. This is used for setting
4# optional make knobs under the DEVELOPER knob.
5
6CC="$*"
7
8# we get something like (this is at least true for gcc and clang)
9#
10# FreeBSD clang version 3.4.1 (tags/RELEASE...)
11get_version_line() {
12 LANG=C LC_ALL=C $CC -v 2>&1 | sed -n '/ version /{p;q;}'
13}
14
15get_family() {
16 get_version_line | sed 's/^\(.*\) version [0-9].*/\1/'
17}
18
19get_version() {
20 # A string that begins with a digit up to the next SP
21 ver=$(get_version_line | sed 's/^.* version \([0-9][^ ]*\).*/\1/')
22
23 # There are known -variant suffixes that do not affect the
24 # meaning of the main version number. Strip them.
25 ver=${ver%-win32}
26 ver=${ver%-posix}
27
28 echo "$ver"
29}
30
31print_flags() {
32 family=$1
33 version=$(get_version | cut -f 1 -d .)
34
35 # Print a feature flag not only for the current version, but also
36 # for any prior versions we encompass. This avoids needing to do
37 # numeric comparisons in make, which are awkward.
38 while test "$version" -gt 0
39 do
40 echo $family$version
41 version=$((version - 1))
42 done
43}
44
45case "$(get_family)" in
46gcc)
47 print_flags gcc
48 ;;
49clang | *" clang")
50 print_flags clang
51 ;;
52"Apple LLVM")
53 print_flags clang
54 ;;
55*)
56 : unknown compiler family
57 ;;
58esac