Hi, I am trying to install the Eclipse platform to compile freertos for an Intel Galileo 2Gen. I just downloaded the port and the Eclipse Neon for C. I have imported the project and added the include folders from the compiler as no libraries where being loaded: C:MinGWlibgccmingw324.6.1includec++ C:MinGWlibgccmingw324.6.1includec++mingw32 C:MinGWlibgccmingw324.6.1includec++backward C:MinGWlibgccmingw324.6.1include C:MinGWinclude C:MinGWlibgccmingw324.6.1include-fixed I also included the include folders of the port. xxxFreeRTOSSourceinclude xxxFreeRTOSDemoCommoninclude I have no include errors but I still find that code is reporting this error on the main_blinky.c file: Symbol ‘portMAXDELAY’ could not be resolved mainblinky.c /RTOSDemo/Blinky_Demo line 229 Semantic Error What I am missing? Thanks

You need to have the chosen port layer in the include path too. In this case: FreeRTOS/Source/portable/GCC/IA32_flat [you are better off using an elf compiler rather than the coff MingW]

I am not sure how to check which compiler I am using. I have installed elf and it is in the path, as described in the Build instructions. I have added: C:jordiIDI2016Odsi1developmentFreeRTOSSourceportableGCCIA32_flat And the error disapeared but now I am seeing this one: .space specifies non-absolute value startup.S /RTOSDemo/Support_Files line 126 C/C++ Problem I also tried adding this folders: C:jordisoftghost-i686-elf-toolslibgcci686-elf4.8.2include C:jordisoftghost-i686-elf-toolslibgcci686-elf4.8.2include-fixed And I got these errors on building the project: ~~~ no such instruction: ‘portfreertosinterruptentry’ RegTest.S /RTOSDemo/FullDemo line 319 C/C++ Problem no such instruction: ‘portfreertosinterruptexit’ RegTest.S /RTOSDemo/FullDemo line 321 C/C++ Problem ~~~ Which should I have included? Thanks

You should not need to add the compiler’s include paths manually. What happens if you try building the project exactly as it is in the download, without any edits?

Just with the FreeRtos includes i get this: .space specifies non-absolute value startup.S /RTOSDemo/Support_Files line 126 C/C++ Problem

Well the line in question is:

gdt:    .space  GDT_BYTES

where GDT_BYTES is:

#define GDT_ENTRIES 8
#define GDT_ENTRY_SIZE  8
#define GDT_BYTES   (GDT_ENTRIES * GDT_ENTRY_SIZE)

so at a guess you could try modifying the line to hard code the GDT_BYTES value as such:

gdt: .space 64

That worked. Now the error is gone, but I see new ones: ~~~ Description Resource Path Location Type no such instruction: portfreertos_interrupt_entry' RegTest.S /RTOSDemo/Full_Demo line 319 C/C++ Problem no such instruction:portfreertosinterruptexit’ RegTest.S /RTOSDemo/Full_Demo line 321 C/C++ Problem ~~~

It would seem that your compiler is not pre-processing the source files properly – that would explain the previous error too. As the file has an upper case .S extension then, as long as you assembly the assembly file with GCC rather than GAS, the pre-processor should replace the macro it is complaining about with inline asm code.

How can I check which compiler I am using? May this mean that I have MinGW running?

The first thing to do is look at the output generated by the compiler as the project builds – you should be able to see the command line. If it is just “gcc” then you are most likely using MingW. You can of course rename the MingW installation directory to see if you then get an error that the project cannot find the compiler.

I was calling the wrong compiler. I just corrected it but I am still getting the same error. This is the console output: ~~~ 12:13:06 **** Incremental Build of configuration Debug for project RTOSDemo **** Info: Internal Builder is used for build i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “BlinkyDemo\mainblinky.o” “..\BlinkyDemo\mainblinky.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\HPET.o” “..\SupportFiles\HPET.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\freestandingfunctions.o” “..\SupportFiles\freestandingfunctions.c” ..SupportFilesfreestandingfunctions.c:77:2: warning: #warning The functions in this file are very basic, and not optimised. [-Wcpp] #warning The functions in this file are very basic, and not optimised. ^ i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “FullDemo\mainfull.o” “..\FullDemo\mainfull.c” i686-elf-as “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -o “SupportFiles\startup.o” “..\SupportFiles\startup.S” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\printf-stdarg.o” “..\SupportFiles\printf-stdarg.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\galileo-support.o” “..\SupportFiles\galileo-support.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “FullDemo\IntQueueTimer.o” “..\FullDemo\IntQueueTimer.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o main.o “..\main.c” ..main.c: In function ‘prvDisplayAssertion’: ..main.c:254:2: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long unsigned int’ [-Wformat=] printf( “ASSERT: File = %s, Line = %unr”, pcFile, ulLine ); ^ i686-elf-as “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -o “FullDemo\RegTest.o” “..\FullDemo\RegTest.S” ..FullDemoRegTest.S: Assembler messages: ..FullDemoRegTest.S:319: Error: no such instruction: portfreertos_interrupt_entry' ..Full_DemoRegTest.S:321: Error: no such instruction:portfreertosinterruptexit’ ~~~

I can see from your output that you are assembling using i686-elf-as, you need to use i686-elf-gcc as per the .c files.

When changing from as to gcc I get this: ~~~ 12:34:13 **** Incremental Build of configuration Debug for project RTOSDemo **** Info: Internal Builder is used for build i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -o “SupportFiles\startup.o” “..\Support_Files\startup.S” path/ghost-i686-elf-tools/bin/../lib/gcc/i686-elf/4.8.2/../../../../i686-elf/bin/ld.exe: cannot find crt0.o: No such file or directory path/ghost-i686-elf-tools/bin/../lib/gcc/i686-elf/4.8.2/../../../../i686-elf/bin/ld.exe: cannot find -lc collect2.exe: error: ld returned 1 exit status ~~~

So now it looks like it has compiled and assembled the .c and .S files, but is failing to link. Again I would ask, what output do you get if you build the project without any modifications – as it looks like you may have command line problems.

The only modifications to the project is adding the following folders to Preferences-C/C++ General/Paths and Symbols/Includes/GNU C:jordiIDI2016Odsi1developmentintelFreeRTOSLabs160112FreeRTOSSourceinclude C:jordiIDI2016Odsi1developmentintelFreeRTOSv9.0.0FreeRTOSDemoCommoninclude C:jordiIDI2016Odsi1developmentFreeRTOSSourceportableGCCIA32_flat And to Assembly: C:jordiIDI2016Odsi1developmentFreeRTOSSourceportableGCCIA32_flat This is what I see in the console: ~~~ 13:04:39 **** Incremental Build of configuration Debug for project RTOSDemo **** Info: Internal Builder is used for build i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\galileo-support.o” “..\SupportFiles\galileo-support.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\HPET.o” “..\SupportFiles\HPET.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o main.o “..\main.c” ..main.c: In function ‘prvDisplayAssertion’: ..main.c:254:2: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long unsigned int’ [-Wformat=] printf( “ASSERT: File = %s, Line = %unr”, pcFile, ulLine ); ^ i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -o “FullDemo\RegTest.o” “..\FullDemo\RegTest.S” PATH/ghost-i686-elf-tools/bin/../lib/gcc/i686-elf/4.8.2/../../../../i686-elf/bin/ld.exe: cannot find crt0.o: No such file or directory PATH/ghost-i686-elf-tools/bin/../lib/gcc/i686-elf/4.8.2/../../../../i686-elf/bin/ld.exe: cannot find -lc collect2.exe: error: ld returned 1 exit status ~~~

I think the linker should have a ‘no start files’ option and/or ‘no standard library’ option on the command line, but from the output – the fact its trying to find crt0.o and the c library – it would appear that is not the case.

Do not use standard start files 
No startup or defaul libs

Where not marked. Now they are but I get the same result ~~~ Info: Internal Builder is used for build i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo\FullDemo” “-IC:\PATH\eclispeneonc\RTOSDemo\SupportFiles” “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSLabs160112\FreeRTOS\Source\include” “-IC:\PATH\2016Odsi\01development\intel\FreeRTOSv9.0.0\FreeRTOS\Demo\Common\include” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -O0 -g3 -Wall -c -fmessage-length=0 -o “SupportFiles\GPIOI2C.o” “..\SupportFiles\GPIOI2C.c” i686-elf-gcc “-IC:\PATH\eclispeneonc\RTOSDemo” “-IC:\PATH\2016Odsi\01development\FreeRTOS\Source\portable\GCC\IA32flat” -o “FullDemo\RegTest.o” “..\FullDemo\RegTest.S” c:/PATH/ghost-i686-elf-tools/bin/../lib/gcc/i686-elf/4.8.2/../../../../i686-elf/bin/ld.exe: cannot find crt0.o: No such file or directory c:/PATH/ghost-i686-elf-tools/bin/../lib/gcc/i686-elf/4.8.2/../../../../i686-elf/bin/ld.exe: cannot find -lc collect2.exe: error: ld returned 1 exit status ~~~

Done it. Looks like I needed to add the “-nostartfiles -nostdlib” not only to the compile configuration but to the assembler. No It builds without errors. Thanks

Done it. Looks like I needed to add the “-nostartfiles -nostdlib” not only to the compile configuration but to the assembler. No It builds without errors. Thanks