| #!/bin/sh |
| # |
| # Probe the compiler for vintage, version, etc. This is used for setting |
| # optional make knobs under the DEVELOPER knob. |
| |
| CC="$*" |
| |
| # we get something like (this is at least true for gcc and clang) |
| # |
| # FreeBSD clang version 3.4.1 (tags/RELEASE...) |
| get_version_line() { |
| $CC -v 2>&1 | grep ' version ' |
| } |
| |
| get_family() { |
| get_version_line | sed 's/^\(.*\) version [0-9].*/\1/' |
| } |
| |
| get_version() { |
| get_version_line | sed 's/^.* version \([0-9][^ ]*\).*/\1/' |
| } |
| |
| print_flags() { |
| family=$1 |
| version=$(get_version | cut -f 1 -d .) |
| |
| # Print a feature flag not only for the current version, but also |
| # for any prior versions we encompass. This avoids needing to do |
| # numeric comparisons in make, which are awkward. |
| while test "$version" -gt 0 |
| do |
| echo $family$version |
| version=$((version - 1)) |
| done |
| } |
| |
| case "$(get_family)" in |
| gcc) |
| print_flags gcc |
| ;; |
| clang | *" clang") |
| print_flags clang |
| ;; |
| "Apple LLVM") |
| print_flags clang |
| ;; |
| *) |
| : unknown compiler family |
| ;; |
| esac |