1. cd dl
2. untar cmake
3. configure cmake with prefix point to your external toolchian host path.
example : /opt/MYTOOLCHAIN_ROOT
4.sudo make all install
5. modify include/cmake.mk
define Build/Configure/Default
(cd $(PKG_BUILD_DIR); \
CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
CXXFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)" \
/opt/MYTOOLCHAIN_ROOT/bin/cmake \
-DCMAKE_SYSTEM_NAME=Linux \
-DCMAKE_SYSTEM_VERSION=1 \
-DCMAKE_SYSTEM_PROCESSOR=$(ARCH) \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" \
-DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" \
-DCMAKE_C_COMPILER="$(CMAKE_C_COMPILER)" \
-DCMAKE_C_COMPILER_ARG1="$(CMAKE_C_COMPILER_ARG1)" \
-DCMAKE_CXX_COMPILER="$(CMAKE_CXX_COMPILER)" \
-DCMAKE_CXX_COMPILER_ARG1="$(CMAKE_CXX_COMPILER_ARG1)" \
-DCMAKE_EXE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
-DCMAKE_MODULE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
-DCMAKE_SHARED_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
-DCMAKE_FIND_ROOT_PATH=$(STAGING_DIR) \
-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=BOTH \
-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
-DCMAKE_STRIP=: \
-DCMAKE_INSTALL_PREFIX=/usr \
-DDL_LIBRARY=$(STAGING_DIR) \
$(CMAKE_OPTIONS) \
. \
)
endef
