[dev-db/mongodb] allow clang on gcc profile

dev-db/mongodb/mongodb-5.0.29.ebuild

@@ -45,6 +45,7 @@ RDEPEND="acct-group/mongodb
 	>=sys-libs/zlib-1.2.12:=
 	clang? (
 		$(llvm_gen_dep "
+			sys-devel/clang:\${LLVM_SLOT}
 			sys-devel/llvm:\${LLVM_SLOT}
 		")
 	)
@@ -117,9 +118,8 @@ pkg_pretend() {
 
 pkg_setup() {
 	python-any-r1_pkg_setup
-	if tc-is-clang; then
+	if use clang; then
 		llvm-r1_pkg_setup
-		llvm_fix_tool_path CC CXX
 	fi
 }
 
@@ -139,11 +139,6 @@ src_configure() {
 	# --use-system-tcmalloc is strongly NOT recommended:
 	# for MONGO_GIT_HASH use GitOrigin-RevId from the commit of the tag
 	scons_opts=(
-		AR="$(tc-getAR)"
-		CC="$(tc-getCC)"
-		CXX="$(tc-getCXX)"
-		CCFLAGS="${CXXFLAGS}"
-
 		VERBOSE=1
 		VARIANT_DIR=gentoo
 		MONGO_VERSION="${PV}"
@@ -161,6 +156,49 @@ src_configure() {
 		--use-system-zstd
 	)
 
+	local have_switched_compiler=
+	if use clang; then
+		# Force clang
+		local version_clang=$(clang --version 2>/dev/null | grep -F -- 'clang version' | awk '{ print $3 }')
+		[[ -n ${version_clang} ]] && version_clang=$(ver_cut 1 "${version_clang}")
+		[[ -z ${version_clang} ]] && die "Failed to read clang version!"
+
+		if tc-is-gcc; then
+			have_switched_compiler=yes
+		fi
+
+		AR=llvm-ar
+		CC=${CHOST}-clang-${version_clang}
+		CXX=${CHOST}-clang++-${version_clang}
+
+		scons_opts+=(
+			AR="$(get_llvm_prefix)/bin/${AR}"
+			CC="$(get_llvm_prefix)/bin/${CC}"
+			CXX="$(get_llvm_prefix)/bin/${CXX}"
+		)
+	elif ! use clang && ! tc-is-gcc ; then
+		# Force gcc
+		have_switched_compiler=yes
+		AR=gcc-ar
+		CC=${CHOST}-gcc
+		CXX=${CHOST}-g++
+		scons_opts+=(
+			AR="${AR}"
+			CC="${CC}"
+			CXX="${CXX}"
+		)
+	fi
+
+	if [[ -n "${have_switched_compiler}" ]] ; then
+		# Because we switched active compiler we have to ensure
+		# that no unsupported flags are set
+		strip-unsupported-flags
+		scons_opts+=(
+			CCFLAGS="${CXXFLAGS}"
+		)
+
+	fi
+
 	use arm64 && scons_opts+=( --use-hardware-crc32=off ) # Bug 701300
 	use amd64 && scons_opts+=( --experimental-optimization=-sandybridge ) # Bug 890294
 	use debug && scons_opts+=( --dbg=on )

dev-db/mongodb/mongodb-6.0.17.ebuild

@@ -46,6 +46,7 @@ RDEPEND="acct-group/mongodb
 	>=sys-libs/zlib-1.2.12:=
 	clang? (
 		$(llvm_gen_dep "
+			sys-devel/clang:\${LLVM_SLOT}
 			sys-devel/llvm:\${LLVM_SLOT}
 		")
 	)
@@ -96,14 +97,6 @@ python_check_deps() {
 	python_has_version -b "dev-python/typing-extensions[${PYTHON_USEDEP}]"
 }
 
-pkg_setup() {
-	python-any-r1_pkg_setup
-	if tc-is-clang; then
-		llvm-r1_pkg_setup
-		llvm_fix_tool_path CC CXX
-	fi
-}
-
 pkg_pretend() {
 	# Bug 809692 + 890294
 	if use amd64 && ! use cpu_flags_x86_avx; then
@@ -124,6 +117,13 @@ pkg_pretend() {
 	fi
 }
 
+pkg_setup() {
+	python-any-r1_pkg_setup
+	if use clang; then
+		llvm-r1_pkg_setup
+	fi
+}
+
 src_prepare() {
 	default
 
@@ -140,11 +140,6 @@ src_configure() {
 	# --use-system-tcmalloc is strongly NOT recommended:
 	# for MONGO_GIT_HASH use GitOrigin-RevId from the commit of the tag
 	scons_opts=(
-		AR="$(tc-getAR)"
-		CC="$(tc-getCC)"
-		CXX="$(tc-getCXX)"
-		CCFLAGS="${CXXFLAGS}"
-
 		VERBOSE=1
 		VARIANT_DIR=gentoo
 		MONGO_VERSION="${PV}"
@@ -162,6 +157,49 @@ src_configure() {
 		--use-system-zstd
 	)
 
+	local have_switched_compiler=
+	if use clang; then
+		# Force clang
+		local version_clang=$(clang --version 2>/dev/null | grep -F -- 'clang version' | awk '{ print $3 }')
+		[[ -n ${version_clang} ]] && version_clang=$(ver_cut 1 "${version_clang}")
+		[[ -z ${version_clang} ]] && die "Failed to read clang version!"
+
+		if tc-is-gcc; then
+			have_switched_compiler=yes
+		fi
+
+		AR=llvm-ar
+		CC=${CHOST}-clang-${version_clang}
+		CXX=${CHOST}-clang++-${version_clang}
+
+		scons_opts+=(
+			AR="$(get_llvm_prefix)/bin/${AR}"
+			CC="$(get_llvm_prefix)/bin/${CC}"
+			CXX="$(get_llvm_prefix)/bin/${CXX}"
+		)
+	elif ! use clang && ! tc-is-gcc ; then
+		# Force gcc
+		have_switched_compiler=yes
+		AR=gcc-ar
+		CC=${CHOST}-gcc
+		CXX=${CHOST}-g++
+		scons_opts+=(
+			AR="${AR}"
+			CC="${CC}"
+			CXX="${CXX}"
+		)
+	fi
+
+	if [[ -n "${have_switched_compiler}" ]] ; then
+		# Because we switched active compiler we have to ensure
+		# that no unsupported flags are set
+		strip-unsupported-flags
+		scons_opts+=(
+			CCFLAGS="${CXXFLAGS}"
+		)
+
+	fi
+
 	use arm64 && scons_opts+=( --use-hardware-crc32=off ) # Bug 701300
 	use amd64 && scons_opts+=( --experimental-optimization=-sandybridge ) # Bug 890294
 	use debug && scons_opts+=( --dbg=on )