Possibly slightly off the range, if so apologies. I am trying to build the FreeRTOS/lwip HTTP server demo for the NXP 1769 board using  the Mentor arm-none-eabi tools (i.e. raw metal). The problem is down to the choice of C runtimes. Do I use the Mentor thumb libraries? And how do I resolve references to perfectly standard functions like memcpy, strlen,strcmp and friends? A (verbose) example of the linker output is shown below. Many thanks, Jerry

arm-none-eabi-ld -nostdlib -Map="router_booter.map" -Trouter_booter_Debug.ld  -or:/data/anemos/main/router_booter/obj/router_booter.axf -L R:/apps/Mentor/lib/gcc/arm-none-eabi/4.6.1/thumb r:/data/anemos/main/router_booter/obj/core_cm3.o r:/data/anemos/main/router_booter/obj/system_lpc17xx.o r:/data/anemos/main/router_booter/obj/cr_startup_lpc176x.o r:/data/anemos/main/router_booter/obj/main.o r:/data/anemos/main/router_booter/obj/printf-stdarg.o r:/data/anemos/main/router_booter/obj/gpio-output-and-software-timers.o r:/data/anemos/main/router_booter/obj/spi-interface-to-sd-card.o r:/data/anemos/main/router_booter/obj/ff.o r:/data/anemos/main/router_booter/obj/mmc.o r:/data/anemos/main/router_booter/obj/syscall.o r:/data/anemos/main/router_booter/obj/croutine.o r:/data/anemos/main/router_booter/obj/list.o r:/data/anemos/main/router_booter/obj/queue.o r:/data/anemos/main/router_booter/obj/tasks.o r:/data/anemos/main/router_booter/obj/timers.o r:/data/anemos/main/router_booter/obj/freertos_cli.o r:/data/anemos/main/router_booter/obj/freertos_driverinterface.o r:/data/anemos/main/router_booter/obj/freertos_ioutils.o r:/data/anemos/main/router_booter/obj/ioutils_charqueuetxandrx.o r:/data/anemos/main/router_booter/obj/ioutils_circularbufferrx.o r:/data/anemos/main/router_booter/obj/ioutils_zerocopytx.o r:/data/anemos/main/router_booter/obj/freertos_lpc17xx_driverinterface.o r:/data/anemos/main/router_booter/obj/freertos_lpc17xx_i2c.o r:/data/anemos/main/router_booter/obj/freertos_lpc17xx_ssp.o r:/data/anemos/main/router_booter/obj/freertos_lpc17xx_uart.o r:/data/anemos/main/router_booter/obj/port.o r:/data/anemos/main/router_booter/obj/heap_2.o r:/data/anemos/main/router_booter/obj/api_lib.o r:/data/anemos/main/router_booter/obj/api_msg.o r:/data/anemos/main/router_booter/obj/err.o r:/data/anemos/main/router_booter/obj/netbuf.o r:/data/anemos/main/router_booter/obj/netdb.o r:/data/anemos/main/router_booter/obj/netifapi.o r:/data/anemos/main/router_booter/obj/sockets.o r:/data/anemos/main/router_booter/obj/tcpip.o r:/data/anemos/main/router_booter/obj/def.o r:/data/anemos/main/router_booter/obj/dhcp.o r:/data/anemos/main/router_booter/obj/dns.o r:/data/anemos/main/router_booter/obj/init.o r:/data/anemos/main/router_booter/obj/lwip_timers.o r:/data/anemos/main/router_booter/obj/mem.o r:/data/anemos/main/router_booter/obj/memp.o r:/data/anemos/main/router_booter/obj/netif.o r:/data/anemos/main/router_booter/obj/pbuf.o r:/data/anemos/main/router_booter/obj/raw.o r:/data/anemos/main/router_booter/obj/stats.o r:/data/anemos/main/router_booter/obj/sys.o r:/data/anemos/main/router_booter/obj/tcp.o r:/data/anemos/main/router_booter/obj/tcp_in.o r:/data/anemos/main/router_booter/obj/tcp_out.o r:/data/anemos/main/router_booter/obj/udp.o r:/data/anemos/main/router_booter/obj/autoip.o r:/data/anemos/main/router_booter/obj/icmp.o r:/data/anemos/main/router_booter/obj/igmp.o r:/data/anemos/main/router_booter/obj/inet.o r:/data/anemos/main/router_booter/obj/inet_chksum.o r:/data/anemos/main/router_booter/obj/ip.o r:/data/anemos/main/router_booter/obj/ip_addr.o r:/data/anemos/main/router_booter/obj/ip_frag.o r:/data/anemos/main/router_booter/obj/lwip_apps.o r:/data/anemos/main/router_booter/obj/basicsocketcommandserver.o r:/data/anemos/main/router_booter/obj/fsdata.o r:/data/anemos/main/router_booter/obj/httpd.o r:/data/anemos/main/router_booter/obj/etharp.o r:/data/anemos/main/router_booter/obj/ethernetif.o r:/data/anemos/main/router_booter/obj/sys_arch.o r:/data/anemos/main/router_booter/obj/debug_frmwrk.o r:/data/anemos/main/router_booter/obj/lpc17xx_adc.o r:/data/anemos/main/router_booter/obj/lpc17xx_can.o r:/data/anemos/main/router_booter/obj/lpc17xx_clkpwr.o r:/data/anemos/main/router_booter/obj/lpc17xx_dac.o r:/data/anemos/main/router_booter/obj/lpc17xx_emac.o r:/data/anemos/main/router_booter/obj/lpc17xx_exti.o r:/data/anemos/main/router_booter/obj/lpc17xx_gpdma.o r:/data/anemos/main/router_booter/obj/lpc17xx_gpio.o r:/data/anemos/main/router_booter/obj/lpc17xx_i2c.o r:/data/anemos/main/router_booter/obj/lpc17xx_i2s.o r:/data/anemos/main/router_booter/obj/lpc17xx_libcfg_default.o r:/data/anemos/main/router_booter/obj/lpc17xx_mcpwm.o r:/data/anemos/main/router_booter/obj/lpc17xx_nvic.o r:/data/anemos/main/router_booter/obj/lpc17xx_pinsel.o r:/data/anemos/main/router_booter/obj/lpc17xx_pwm.o r:/data/anemos/main/router_booter/obj/lpc17xx_qei.o r:/data/anemos/main/router_booter/obj/lpc17xx_rit.o r:/data/anemos/main/router_booter/obj/lpc17xx_rtc.o r:/data/anemos/main/router_booter/obj/lpc17xx_spi.o r:/data/anemos/main/router_booter/obj/lpc17xx_ssp.o r:/data/anemos/main/router_booter/obj/lpc17xx_systick.o r:/data/anemos/main/router_booter/obj/lpc17xx_timer.o r:/data/anemos/main/router_booter/obj/lpc17xx_uart.o r:/data/anemos/main/router_booter/obj/lpc17xx_wdt.o 
arm-none-eabi-ld: r:/data/anemos/main/router_booter/obj/router_booter.axf section `.bss' will not fit in region `RamLoc32'
arm-none-eabi-ld: region `RamLoc32' overflowed by 6312 bytes
r:/data/anemos/main/router_booter/obj/system_lpc17xx.o: In function `SystemCoreClockUpdate':
system_lpc17xx.c:(.text.SystemCoreClockUpdate+0xb4): undefined reference to `__aeabi_uldivmod'
system_lpc17xx.c:(.text.SystemCoreClockUpdate+0xd8): undefined reference to `__aeabi_uldivmod'
system_lpc17xx.c:(.text.SystemCoreClockUpdate+0x154): undefined reference to `__aeabi_uldivmod'
system_lpc17xx.c:(.text.SystemCoreClockUpdate+0x178): undefined reference to `__aeabi_uldivmod'
system_lpc17xx.c:(.text.SystemCoreClockUpdate+0x1ee): undefined reference to `__aeabi_uldivmod'
r:/data/anemos/main/router_booter/obj/system_lpc17xx.o:system_lpc17xx.c:(.text.SystemCoreClockUpdate+0x212): more undefined references to `__aeabi_uldivmod' follow
r:/data/anemos/main/router_booter/obj/main.o: In function `prvTaskStatsCommand':
main.c:(.text.prvTaskStatsCommand+0x1a): undefined reference to `strcpy'
main.c:(.text.prvTaskStatsCommand+0x20): undefined reference to `strlen'
r:/data/anemos/main/router_booter/obj/main.o: In function `prvRunTimeStatsCommand':
main.c:(.text.prvRunTimeStatsCommand+0x1a): undefined reference to `strcpy'
main.c:(.text.prvRunTimeStatsCommand+0x20): undefined reference to `strlen'
r:/data/anemos/main/router_booter/obj/main.o: In function `prvManuallyPlaceLargeDataInAHBRAM':
main.c:(.text.prvManuallyPlaceLargeDataInAHBRAM+0x7c): undefined reference to `memset'
r:/data/anemos/main/router_booter/obj/spi-interface-to-sd-card.o: In function `prvWriteFilesToDisk':
spi-interface-to-sd-card.c:(.text.prvWriteFilesToDisk+0x8c): undefined reference to `memset'
r:/data/anemos/main/router_booter/obj/spi-interface-to-sd-card.o: In function `prvReadBackCreatedFiles':
spi-interface-to-sd-card.c:(.text.prvReadBackCreatedFiles+0x94): undefined reference to `memset'
r:/data/anemos/main/router_booter/obj/queue.o: In function `prvCopyDataToQueue':
queue.c:(.text.prvCopyDataToQueue+0x44): undefined reference to `memcpy'
queue.c:(.text.prvCopyDataToQueue+0x7a): undefined reference to `memcpy'
r:/data/anemos/main/router_booter/obj/queue.o: In function `prvCopyDataFromQueue':
queue.c:(.text.prvCopyDataFromQueue+0x42): undefined reference to `memcpy'

There should not be any differences to the standard library functions. The output in your post does not look like the wrong library is being used, but that no library is being used at all. Normally it would pick the right library automatically based on the  other compiler options, so compare your command line with other examples that use the same compiler in the FreeRTOS demo directory. Unless code sourcery provide their own library for small devices, consider providing your own implementation of these functions anyway, as GCC libraries are not microcontroller friendly. If you are using a Cortex-M3 then you will have to use the thumb libraries, as Cortex only has thumb2. Have you looked at the demo provided for FreeRTOS+IO which builds an lwIP web server for an LPC1769 using GCC?

Hello Dave and thanks. I’m looking at the demo now. Mentor/CS do provide a libgcc for the thumb

Ah. I’m using g++, not gcc due to a licensing snafu. No g++ libraries installed! Thanks for the pointer Dave.