mbed export -m LPC1768 -i gnuarmeclipse
Scan: .
Scan: FEATURE_BLE
Scan: FEATURE_LWIP
Scan: FEATURE_ETHERNET_HOST
Scan: FEATURE_LOWPAN_BORDER_ROUTER
Scan: FEATURE_LOWPAN_HOST
Scan: FEATURE_LOWPAN_ROUTER
Scan: FEATURE_NANOSTACK
Scan: FEATURE_NANOSTACK_FULL
Scan: FEATURE_THREAD_BORDER_ROUTER
Scan: FEATURE_THREAD_END_DEVICE
Scan: FEATURE_THREAD_ROUTER

Create a GNU ARM Eclipse C++ managed project
Project name: BBB
Target: LPC1768
Toolchain: GCC_ARM
Source folders: 13, with 55 exclusions
Include folders: 32
Symbols: 38
Linker script: mbed-os/targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_GCC_ARM/LPC1768.ld

Build configuration: Debug
Common flags: -c -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -fmessage-length=0 -fno-exceptions -fno-builtin -ffunction-sections -fdata-sections -funsigned-char -MMD -fno-delete-null-pointer-checks -fomit-frame-pointer -O0 -g3 -mcpu=cortex-m3 -mthumb
C++ flags: -std=gnu++98 -fno-rtti -Wvla -include mbed_config.h
C flags: -std=gnu99 -include mbed_config.h
ASM flags: -x assembler-with-cpp
Linker flags: -Wl,--gc-sections -Wl,--wrap,main -Wl,--wrap,_malloc_r -Wl,--wrap,_free_r -Wl,--wrap,_realloc_r -Wl,--wrap,_calloc_r -Wl,--wrap,exit -Wl,--wrap,atexit -mcpu=cortex-m3 -mthumb

Build configuration: Develop
Common flags: -c -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -fmessage-length=0 -fno-exceptions -fno-builtin -ffunction-sections -fdata-sections -funsigned-char -MMD -fno-delete-null-pointer-checks -fomit-frame-pointer -Os -mcpu=cortex-m3 -mthumb
C++ flags: -std=gnu++98 -fno-rtti -Wvla -include mbed_config.h
C flags: -std=gnu99 -include mbed_config.h
ASM flags: -x assembler-with-cpp
Linker flags: -Wl,--gc-sections -Wl,--wrap,main -Wl,--wrap,_malloc_r -Wl,--wrap,_free_r -Wl,--wrap,_realloc_r -Wl,--wrap,_calloc_r -Wl,--wrap,exit -Wl,--wrap,atexit -mcpu=cortex-m3 -mthumb

Build configuration: Release
Common flags: -c -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -fmessage-length=0 -fno-exceptions -fno-builtin -ffunction-sections -fdata-sections -funsigned-char -MMD -fno-delete-null-pointer-checks -fomit-frame-pointer -Os -DNDEBUG -mcpu=cortex-m3 -mthumb
C++ flags: -std=gnu++98 -fno-rtti -Wvla -include mbed_config.h
C flags: -std=gnu99 -include mbed_config.h
ASM flags: -x assembler-with-cpp
Linker flags: -Wl,--gc-sections -Wl,--wrap,main -Wl,--wrap,_malloc_r -Wl,--wrap,_free_r -Wl,--wrap,_realloc_r -Wl,--wrap,_calloc_r -Wl,--wrap,exit -Wl,--wrap,atexit -mcpu=cortex-m3 -mthumb

Done. Import the 'BBB' project in Eclipse.