Grub Error 13 on Cygwin but not Linux

[gsingh2011]

I followed the Bare Bones tutorial a year or two ago on Ubuntu and got it working. Now I transferred it over to Cygwin on windows and it compiles and links fine but when I try to run it in qemu for windows and I get Error 13: Invalid or unsupported executable format. I followed this guide too: http://wiki.osdev.org/Grub_Error_13 and it didn't work.

So why is cygwin causing a problem?

[Rudster816]

You need to setup a cross compiler. http://wiki.osdev.org/GCC_Cross-Compiler

If your using the default Cygwin tools, then it is outputting a PE file, which GRUB does not support without the a.out kludge.

[gsingh2011]

Thanks, but I'm running into an error. I followed all the directions in the wiki and ran the following commands without any error.

Code: Select all

export PREFIX=/usr/local/cross
export TARGET=i586-elf
cd /usr/src
mkdir build-binutils build-gcc

cd /usr/src/build-binutils
../binutils-x.xx/configure --target=$TARGET --prefix=$PREFIX --disable-nls
make all
make install

cd /usr/src/build-gcc
export PATH=$PATH:$PREFIX/bin
../gcc-x.x.x/configure --target=$TARGET --prefix=$PREFIX --disable-nls \
    --enable-languages=c,c++ --without-headers

The problem is when I type the next command, make all-gcc, I get the following error:
make: *** No rule to make target `all-gcc'. Stop.

I followed all of the instructions, so why am I getting this error?

I attached config.log, a file produced in build-gcc.

[Owen]

Sorry, but quite blatantly GCC's configure did not complete successfully:

The following requested languages could not be built: c++
Supported languages are: c,lto

You downloaded the gcc-base rather than gcc tarball. If you didn't want a C++ compiler, this is fine; but the base tarball doesn't contain g++, so you can't pass c++ to --enable-languages.

Note to self: Update the cross compiler wiki article to do a single tree build of Binutils, GCC, MPFR & co. It's less error prone and faster...

[gsingh2011]

Yea, I didn't really need C++ but I decided to follow the wiki word for word so that if I ran into an error here I could say that I followed it word for word. I thought it would ignore that and go proceed with configuring it for C. So I changed that line to only support C and so now I have the cross compiler running. I had to make some changes to my compile script like adding -Wno-pointer-to-int-cast and -fno-builtin because I got a lot of warnings I didn't get before but no errors from the compiler. The problem is I'm getting this error from the linker now: Object Files/kernel.o: file not recognized: File format not recognized

Did I build the compiler wrong? I'll repeat the steps while I'm waiting for a reply but hopefully there's an easy fix.

EDIT: I built gcc again and I'm still getting the same error.

EDIT2:I looked through config.log and I found something I didn't see before:
conftest.c: In function `main':
conftest.c:16: error: `choke' undeclared (first use in this function)
conftest.c:16: error: (Each undeclared identifier is reported only once
conftest.c:16: error: for each function it appears in.)
conftest.c:16: error: parse error before "me"

The config.log is attached.

EDIT3:Ok, I was stupid and it was all just a typing mistake :/

I'm working on getting rid of the new error error: instruction not supported in 64-bit mode. But I'm going to try to figure it out. If I don't have any luck I'll post back here in a few days.