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05 April 2024, 19:32:26 UTC
Revision 84d06cdc06389ae7c462434cb7b1db0980f63860 authored by Junio C Hamano on 26 March 2021, 21:59:47 UTC, committed by Junio C Hamano on 26 March 2021, 21:59:47 UTC 
Sync with v2.31.1
2 parent s 26c4f98 + 48bf2fa
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Tip revision: 84d06cdc06389ae7c462434cb7b1db0980f63860 authored by Junio C Hamano on 26 March 2021, 21:59:47 UTC
Sync with v2.31.1
Tip revision: 84d06cd
detect-compiler 
#!/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)
	print_flags clang
	;;
"FreeBSD clang")
	print_flags clang
	;;
"Apple LLVM")
	print_flags clang
	;;
*)
	: unknown compiler family
	;;
esac
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