Hi, Could anyone explain why my project failed to build. The compiler error message is listed below. Particularly things such as "undefined reference to `vPortStartFirstTask’" Nothing regarding the compiler has changed. I am using the PIC32 compiler from MPLab This project is a copy of the PIC32 demo project that comes with FreeRTOS I can upload the project if someone tells me where. Many thanks Grant Brown -——————————————————————— Debug build of project `C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABRTOSDemo.mcp’ started. Preprocessor symbol `__DEBUG’ is defined. Target debug platform is `__MPLAB_DEBUGGER_PIC32MXSK=1′. Mon Oct 27 16:04:44 2008 -——————————————————————— Clean: Deleting intermediary and output files. Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABmain.o". Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABport.o". Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABlist.o". Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABqueue.o". Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABtasks.o". Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABheap_2.o". Clean: Deleted file "C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABinit_PIC32MX360F512L.o". Clean: Done. Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "main.c" -o"main.o" -MMD -MF"main.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer main.c: In function `main’: main.c:90: warning: implicit declaration of function `VisualInitialization’ Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "..\..SourceportableMPLABPIC32MXport.c" -o"port.o" -MMD -MF"port.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "..\..Sourcelist.c" -o"list.o" -MMD -MF"list.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "..\..Sourcequeue.c" -o"queue.o" -MMD -MF"queue.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "..\..Sourcetasks.c" -o"tasks.o" -MMD -MF"tasks.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "..\..SourceportableMemMangheap_2.c" -o"heap_2.o" -MMD -MF"heap_2.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L -x c -c "Generated FilesVDIInitinit_PIC32MX360F512L.c" -o"init_PIC32MX360F512L.o" -MMD -MF"init_PIC32MX360F512L.d" -I"." -I"." -I"..commoninclude" -I"..\..sourceportablemplabpic32mx" -I"..\..sourceinclude" -D__DEBUG -g -DMPLAB_PIC32MX_PORT -Wall -fomit-frame-pointer Executing: "C:Program FilesMicrochipMPLAB C32binpic32-gcc.exe" -mprocessor=32MX360F512L "main.o" "port.o" "list.o" "queue.o" "tasks.o" "heap_2.o" "init_PIC32MX360F512L.o" -o"RTOSDemo.elf" -O3 -Wl,–defsym=__MPLAB_BUILD=1,–defsym=__MPLAB_DEBUG=1,–defsym=__MPLAB_DEBUGGER_PIC32MXSK=1,–defsym=_min_heap_size=0,–defsym=_min_heap_size=0,-Map="RTOSDemo.map" port.o: In function `xPortStartScheduler’: ..\..SourceportableMPLABPIC32MX/port.c:163: undefined reference to `vPortStartFirstTask’ ..\..SourceportableMPLABPIC32MX/port.c:163: relocation truncated to fit: R_MIPS_26 against `vPortStartFirstTask’ port.o: In function `__vector_dispatch_1′: ..\..SourceportableMPLABPIC32MXport.c:(.vector_1+0x0): undefined reference to `vPortYieldISR’ ..\..SourceportableMPLABPIC32MXport.c:(.vector_1+0x0): relocation truncated to fit: R_MIPS_26 against `vPortYieldISR’ port.o: In function `__vector_dispatch_4′: ..\..SourceportableMPLABPIC32MXport.c:(.vector_4+0x0): undefined reference to `vT1InterruptHandler’ ..\..SourceportableMPLABPIC32MXport.c:(.vector_4+0x0): relocation truncated to fit: R_MIPS_26 against `vT1InterruptHandler’ Link step failed. -——————————————————————— Debug build of project `C:Program FilesMicrochipFreeRTOSDemoPIC32MX_MPLABRTOSDemo.mcp’ failed. Preprocessor symbol `__DEBUG’ is defined. Target debug platform is `__MPLAB_DEBUGGER_PIC32MXSK=1′. Mon Oct 27 16:04:50 2008 -——————————————————————— BUILD FAILED

The functions it cannot find are all defined in FreeRTOSSourceportableMPLABPIC32MXport_asm.S – so I would guess this file is not included in your project. Regards.

I have just noticed that there is a new version of MPLAB available.  Maybe this is why there have been a couple of PIC32 build problems in the last couple of days.  I’m just downloading it now to see what effects it has on my build.

I just tried with MPLAB V8.15 and a clean install of FreeRTOS.org V5.1.0 – all built with no problems. MPLAB now contains a FreeRTOS viewer. Regards.