dev-db/percona-server: migrate checking for enabled lto, to tc-is-lto

This toolchain func was recently added, and vis a lot more reliable than
get-flagq. mysql attempts to manually handle some edge case, for example
if the active flags contain `-flto -fno-lto` then tc-is-lto gets it
correct but with is-flagq we have to manually check both. On the other
hand, mysql doesn't handle detecting -flto=8.

Using tc-is-lto is the preferred way to handle this from now on. We
would rather use this wherever possible.

Drops a bit of pointless logging. We don't need an `einfo` to tell us
that make.conf is being respected.

Signed-off-by: Eli Schwartz <eschwartz93@gmail.com>
Signed-off-by: Sam James <sam@gentoo.org>

dev-db/percona-server/percona-server-8.0.26.16-r2.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2023 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="7"
@@ -259,15 +259,10 @@ src_configure() {
 		-DWITH_ROUTER=$(usex router ON OFF)
 	)
 
-	if is-flagq -fno-lto ; then
-		einfo "LTO disabled via {C,CXX,F,FC}FLAGS"
-		mycmakeargs+=( -DWITH_LTO=OFF )
-	elif is-flagq -flto ; then
-		einfo "LTO forced via {C,CXX,F,FC}FLAGS"
-		myconf+=( -DWITH_LTO=ON )
+	if tc-is-lto ; then
+		mycmakeargs+=( -DWITH_LTO=ON )
 	else
-		# Disable automagic
-		myconf+=( -DWITH_LTO=OFF )
+		mycmakeargs+=( -DWITH_LTO=OFF )
 	fi
 
 	if use test ; then