diff --git a/Tuprules.tup b/Tuprules.tup
index 88a6441e0..58093f288 100644
--- a/Tuprules.tup
+++ b/Tuprules.tup
@@ -1,26 +1,40 @@
 .gitignore
 
+export CC
+export CXX
+export LD
+
+CC = $CC
+CXX = $CXX
+LD= $LD
+OBJCOPY = $OBJCOPY
+
 OUT_DIR=$(TUP_CWD)/out
 DEV_DIR = $(TUP_CWD)/dev
 DEV_LIB_DIR = $(DEV_DIR)/lib
 
+ifdef IS_GCC
+include tup-genode/gcc.tup
+endif
+
+ifdef IS_LLVM
+include tup-genode/llvm.tup
+endif
+
+ifeq ($(TOOLCHAIN_CONFIGURED),)
+error no toolchain configuration is active
+endif
+
+ifneq ($(TOOLCHAIN_CONFIGURED),X)
+error "multiple toolchain configurations are active "
+endif
 
 ifeq (@(TUP_ARCH),i386)
 X86 = y
-CC_MARCH = -march=i686 -m32
-LD_MARCH = -melf_i386
-AS_MARCH = -march=i686 --32
 endif
 
 ifeq (@(TUP_ARCH),x86_64)
 X86 = y
-TOOL_CHAIN_PREFIX=genode-x86-
-CC_MARCH = -m64 -mcmodel=large
-LD_MARCH = -melf_x86_64
-endif
-
-ifeq (@(TUP_ARCH),arm_v8)
-CC_MARCH = -march=armv8-a
 endif
 
 GENODE_DIR = $(TUP_CWD)
@@ -50,23 +64,6 @@ GENODE_DIR = $(TUP_CWD)
 |> $(DEV_LIB_DIR)/%b \
 	$(DEV_DIR)/<lib> \
 
-export CC
-export CXX
-export LD
-
-CC = $CC
-CXX = $CXX
-LD= $LD
-OBJCOPY = $OBJCOPY
-
-ifdef CXXFLAGS
-CXXFLAGS = @(CXXFLAGS)
-endif
-
-CXXFLAGS += -Wno-undefined-bool-conversion -Wno-unknown-attributes -Wsystem-headers -Werror -Wno-uninitialized -Wno-mismatched-tags
-
-LIBGCC = `$(CC) $(CC_MARCH) -print-libgcc-file-name`
-
 export PKG_CONFIG_PATH
 PKG_CONFIG_DIR = $(DEV_DIR)/lib/pkgconfig
 PKG_CONFIG = PKG_CONFIG_PATH=$(PKG_CONFIG_DIR):$PKG_CONFIG_PATH pkg-config
@@ -80,27 +77,11 @@ else
 OLEVEL = -O2
 endif
 
-!ir = | $(DEV_DIR)/<pkg-config> |> clang $(OLEVEL) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) `$(PKG_CONFIG) --cflags $(LIBS)` $(CPPFLAGS) -S -emit-llvm %f |> %B.ll
-
-!asm = |> ^ CC %b^ @(CC_WRAPPER) $(CC) $(OLEVEL) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) -D__ASSEMBLY__ $(CPPFLAGS) -c %f -o %o |> %B.o
-
-!cc = | $(DEV_DIR)/<pkg-config> |> ^o CC %f^ @(CC_WRAPPER) $(CC) $(OLEVEL) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) $(CPPFLAGS) `$(PKG_CONFIG) --cflags $(LIBS) $(LIBS_CFLAGS)` -c -fPIC %f -o %o |> %B.o
-
-!cxx = | $(DEV_DIR)/<pkg-config> |> ^o CXX %b^ @(CC_WRAPPER) $(CXX) $(OLEVEL) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) $(CPPFLAGS) `$(PKG_CONFIG) --cflags $(LIBS)` -c -fPIC %f -o %o |> %B.o
-
-!ld = | $(DEV_DIR)/<lib> $(DEV_DIR)/<pkg-config> |> ^o LD %o^ $(LD) $(LDFLAGS) `$(PKG_CONFIG) --libs $(LIBS)` --whole-archive --start-group %f --no-whole-archive --end-group -o %o |>
-
 export STRIP
 !strip = |> $STRIP -o %o %f |>
 
 !ln = |> ln -s %f %o |>
 
-!incbin = |> ^ incbin %f^ \
-	export SYM=_binary_`echo %f | sed 's/\./_/g'`; \
-	echo ".global ${SYM}_start, ${SYM}_end; .data; .align 4; ${SYM}_start:; .incbin \"%f\"; ${SYM}_end:" \
-		| llvm-mc -filetype=obj - > %o \
-|> binary_%b.o
-
 export AR
 !ar = |> $AR -rcs %o %f |> %d.a
 
diff --git a/tup-genode/gcc.tup b/tup-genode/gcc.tup
new file mode 100644
index 000000000..908723d1b
--- /dev/null
+++ b/tup-genode/gcc.tup
@@ -0,0 +1,41 @@
+TOOLCHAIN_CONFIGURED=$(TOOLCHAIN_CONFIGURED)X
+
+ifeq (@(TUP_ARCH),i386)
+CC_MARCH = -march=i686 -m32
+LD_MARCH = -melf_i386
+AS_MARCH = -march=i686 --32
+endif
+
+ifeq (@(TUP_ARCH),x86_64)
+CC_MARCH = -m64 -mcmodel=large
+LD_MARCH = -melf_x86_64
+endif
+
+ifeq (@(TUP_ARCH),arm_v8)
+CC_MARCH = -march=armv8-a
+endif
+
+ifdef CXXFLAGS
+CXXFLAGS = @(CXXFLAGS)
+endif
+
+CXXFLAGS += -Wno-undefined-bool-conversion -Wno-unknown-attributes -Wsystem-headers -Werror -Wno-uninitialized -Wno-mismatched-tags
+
+LIBGCC = `$(CC) $(CC_MARCH) -print-libgcc-file-name`
+
+!ir = | $(DEV_DIR)/<pkg-config> |> clang $(OLEVEL) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) `$(PKG_CONFIG) --cflags $(LIBS)` $(CPPFLAGS) -S -emit-llvm %f |> %B.ll
+
+!asm = |> ^ CC %b^ @(CC_WRAPPER) $(CC) $(OLEVEL) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) -D__ASSEMBLY__ $(CPPFLAGS) -c %f -o %o |> %B.o
+
+!cc = | $(DEV_DIR)/<pkg-config> |> ^o CC %f^ @(CC_WRAPPER) $(CC) $(OLEVEL) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) $(CPPFLAGS) `$(PKG_CONFIG) --cflags $(LIBS) $(LIBS_CFLAGS)` -c -fPIC %f -o %o |> %B.o
+
+!cxx = | $(DEV_DIR)/<pkg-config> |> ^o CXX %b^ @(CC_WRAPPER) $(CXX) $(OLEVEL) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) $(CPPFLAGS) `$(PKG_CONFIG) --cflags $(LIBS)` -c -fPIC %f -o %o |> %B.o
+
+!ld = | $(DEV_DIR)/<lib> $(DEV_DIR)/<pkg-config> |> ^o LD %o^ $(LD) $(LDFLAGS) `$(PKG_CONFIG) --libs $(LIBS)` --whole-archive --start-group %f --no-whole-archive --end-group -o %o |>
+
+!incbin = |> ^ incbin %f^ \
+	export SYM=_binary_`echo %f | sed 's/\./_/g'`; \
+	echo ".global ${SYM}_start, ${SYM}_end; .data; .align 4; ${SYM}_start:; .incbin \"%f\"; ${SYM}_end:" \
+		| llvm-mc -filetype=obj - > %o \
+|> binary_%b.o
+
diff --git a/tup-genode/llvm.tup b/tup-genode/llvm.tup
new file mode 100644
index 000000000..449b185b3
--- /dev/null
+++ b/tup-genode/llvm.tup
@@ -0,0 +1,40 @@
+TOOLCHAIN_CONFIGURED=$(TOOLCHAIN_CONFIGURED)X
+
+ifeq (@(TUP_ARCH),i386)
+CC_MARCH = -march=i686 -m32
+LD_MARCH = -melf_i386
+AS_MARCH = -march=i686 --32
+endif
+
+ifeq (@(TUP_ARCH),x86_64)
+CC_MARCH = -m64 -mcmodel=large
+LD_MARCH = -melf_x86_64
+endif
+
+ifeq (@(TUP_ARCH),arm_v8)
+CC_MARCH = -march=armv8-a
+endif
+
+ifdef CXXFLAGS
+CXXFLAGS = @(CXXFLAGS)
+endif
+
+CXXFLAGS += -Wno-undefined-bool-conversion -Wno-unknown-attributes -Wsystem-headers -Werror -Wno-uninitialized -Wno-mismatched-tags
+
+LIBGCC = `$(CC) $(CC_MARCH) -print-libgcc-file-name`
+
+!ir = | $(DEV_DIR)/<pkg-config> |> clang $(OLEVEL) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) `$(PKG_CONFIG) --cflags $(LIBS)` $(CPPFLAGS) -S -emit-llvm %f |> %B.ll
+
+!asm = |> ^ CC %b^ @(CC_WRAPPER) $(CC) $(OLEVEL) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) -D__ASSEMBLY__ $(CPPFLAGS) -c %f -o %o |> %B.o
+
+!cc = | $(DEV_DIR)/<pkg-config> |> ^o CC %f^ @(CC_WRAPPER) $(CC) $(OLEVEL) $(CFLAGS) $(CFLAGS_%e) $(CFLAGS_%f) $(CPPFLAGS) `$(PKG_CONFIG) --cflags $(LIBS) $(LIBS_CFLAGS)` -c -fPIC %f -o %o |> %B.o
+
+!cxx = | $(DEV_DIR)/<pkg-config> |> ^o CXX %b^ @(CC_WRAPPER) $(CXX) $(OLEVEL) $(CXXFLAGS) $(CXXFLAGS_%e) $(CXXFLAGS_%f) $(CPPFLAGS) `$(PKG_CONFIG) --cflags $(LIBS)` -c -fPIC %f -o %o |> %B.o
+
+!ld = | $(DEV_DIR)/<lib> $(DEV_DIR)/<pkg-config> |> ^o LD %o^ $(LD) $(LDFLAGS) `$(PKG_CONFIG) --libs $(LIBS)` --whole-archive --start-group %f --no-whole-archive --end-group -o %o |>
+
+!incbin = |> ^ incbin %f^ \
+	export SYM=_binary_`echo %f | sed 's/\./_/g'`; \
+	echo ".global ${SYM}_start, ${SYM}_end; .data; .align 4; ${SYM}_start:; .incbin \"%f\"; ${SYM}_end:" \
+		| llvm-mc -filetype=obj - > %o \
+|> binary_%b.o