x11-misc/xtrlock: force gcc -E for imake's generation

Requires traditional cpp support and is broken in all sort of ways
with clang-cpp / -E. Can still use clang & friends for everything else.

Ideally these packages need to be built another way or last rited,
imake will just accumulate more problems.

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

x11-misc/xtrlock/xtrlock-2.13-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -12,17 +12,19 @@ SLOT="0"
 LICENSE="GPL-3"
 KEYWORDS="amd64 ppc x86"
 
-RDEPEND="virtual/libcrypt:=
+RDEPEND="
+	virtual/libcrypt:=
 	x11-libs/libX11"
-DEPEND="${RDEPEND}"
+DEPEND="
+	${RDEPEND}
+	x11-base/xorg-proto"
 BDEPEND="
-	x11-base/xorg-proto
-	>=x11-misc/imake-1.0.8-r1
-"
+	sys-devel/gcc
+	>=x11-misc/imake-1.0.8-r1"
 
 src_configure() {
 	CC="$(tc-getBUILD_CC)" LD="$(tc-getLD)" \
-		IMAKECPP="${IMAKECPP:-$(tc-getCPP)}" xmkmf || die
+		IMAKECPP="${IMAKECPP:-${CHOST}-gcc -E}" xmkmf || die
 }
 
 src_compile() {