about mb-gcc error???

Question

what's wrong with following error????[root@184pc140 bin]# ./mb-gcc hello.c/home/devel/uclinux/bin/mb_tools/bin/../lib/gcc/microblaze/3.4.1/../../../../microblaze/lib/libc.a(write.o): In function `write':write.o(.text+0x34): undefined reference to `outbyte'write.o(.text+0x58): undefined reference to `outbyte'/home/devel/uclinux/bin/mb_tools/bin/../lib/gcc/microblaze/3.4.1/../../../../microblaze/lib/libc.a(read.o): In function `read':read.o(.text+0x2c): undefined reference to `inbyte'collect2: ld returned 1 exit status

backhus · Accepted Answer

Hi,There's nothing wrong with the error.Quite the contrary. It shows you that the linker (ld) is able to do correct checks of the used references in your compiled object codes. Furthermore  it is so kind to inform you about missing ones and that itcan't proceed it's work unless YOU provide consistent sources and/or libraries to work with. ;-)So where do you think outbyte and inbyte come from? The linker wants to know. You have to tell it.Good luck   Eilert schrieb:

beeraka · Answer

In EDK, please set your STDIN and STDOUT to whatever RS232 UART's thatyou have.-- parag

John Williams · Answer

Hi, wrote:inbyte and outbyte are provided by the Xilinx low level libxil.a libraryfile.  However, by invoking gcc from the command line with no extraoptions (like link path etc), the linker has been unable to find this.What are you trying to do?  Build a C app for MicroBlaze in standalonemode, or for Linux?  If you are building Linux apps, grab PetaLinux( which includes a standalone MicroBlaze Linuxtoolchain - you can just domicroblaze-uclinux-gcc -o hello hello.cand it will magincally produce a Linux-ready binary.Regards,John

about mb-gcc error???

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