i'll make this one work later, maybe

dev-util/buildcache/Manifest

@@ -0,0 +1 @@
+DIST buildcache-0.31.3.tar.gz 1522631 BLAKE2B b24329d7452612f91b17990e2909d84c61a2fc5e211899f7e87cbcf97679c4fdcf9581469dec2919eb7ab026fbacd768f6dba6a3ed91dc1499b4e0337e48c0bd SHA512 cdd53fd829190e26bc0a9a4e2bd3e9cd39eb9abf98e621b07f4a749c24e7f1288d68dc1f2e550e49ebbf511a12b89d7c05b68e695510df881b54f54982879267

dev-util/buildcache/buildcache-0.31.3.ebuild

@@ -0,0 +1,50 @@
+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake
+
+DESCRIPTION="A compiler wrapper that caches compilation results for faster recompilation"
+HOMEPAGE="https://gitlab.com/bits-n-bites/buildcache"
+SRC_URI="https://gitlab.com/bits-n-bites/buildcache/-/archive/v${PV}/${PN}-v${PV}.tar.gz -> ${P}.tar.gz"
+S="${WORKDIR}/${PN}-v${PV}"
+
+LICENSE="zlib" #"MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~x86"
+IUSE="doc lz4 test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	virtual/pkgconfig
+	doc? ( app-text/doxygen )
+	test? ( dev-cpp/gtest )
+"
+
+DEPEND="
+	app-arch/zstd:=
+	sys-libs/zlib:=
+	lz4? ( app-arch/lz4:= )
+"
+RDEPEND="${DEPEND}"
+
+src_prepare() {
+	cd "${S}"
+	mv ./src/* ./
+
+	epatch "${FILES}/00.test.patch"
+
+	default
+	cmake_src_prepare
+}
+
+src_configure() {
+	local mycmakeargs=(
+#		-DBUILDCACHE_ENABLE_LZ4=$(usex lz4)
+#		-DBUILDCACHE_ENABLE_LZFSE=OFF  # macOS-only
+#		-DBUILDCACHE_ENABLE_TESTS=$(usex test)
+		-DBUILD_SHARED_LIBS=ON
+	)
+	cmake_src_configure
+}

dev-util/buildcache/files/00.test.patch

@@ -0,0 +1,7 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -22,0 +22,2 @@
+   compressor.hpp
++  configuration.cpp
++  configuration.hpp
+   debug_utils.cpp