Building a Linux-x-djgpp cross compiler (original) (raw)

Building a Linux-x-djgpp cross compiler

Step-by-step instructions for setting up a djgpp cross compiler on your linux machine.

Lines that start with '$' indicate that you should type in the line as shown (except for the '$' of course), substituting paths appropriate for your system.

I'm pretty sure this is what I did to install my djgpp cross compilers... let me know if I missed anything - DJ

$ mkdir -p ~/djgpp/cross $ cd ~/djgpp/cross

$ unzip -a ~/djcrx202.zip (get this from simtel)

$ mkdir /usr/local/i586-pc-msdosdjgpp $ cd /usr/local/i586-pc-msdosdjgpp $ mkdir bin lib $ ln -s ~/djgpp/cross/include . $ cd lib $ ln -s ~/djgpp/cross/lib/* .

If you'll be wanting to delete your djgpp directory later, use "cp -r" instead of "ln -s" to copy the directories and libraries instead of linking them.

$ cd ~/djgpp/cross/src/stub $ gcc -O stubify.c -o /usr/local/i586-pc-msdosdjgpp/bin/stubify

$ cd ~/djgpp/cross $ tar xvfz ~/gcc-2.8.1.tar.gz (get this from ftp.gnu.org) $ tar xvfz ~/binutils-2.9.1.tar.gz (get this from ftp.gnu.org) $ mkdir binu gcc

Apply this patch in the binutils-2.9.1/gas/config directory. This prevents symbol table bloat:

--- te-go32.h.orig Thu May 21 10:41:36 1998 +++ te-go32.h Thu May 21 15:45:14 1998 @@ -6,7 +6,7 @@ #define LOCAL_LABELS_FB 1

#define TARGET_FORMAT "coff-go32"

+#define TE_GO32 /* GAS should treat '.align value' as an alignment of 2**value */ #define USE_ALIGN_PTWO

--- tc-i386.h.orig Thu May 21 10:41:26 1998 +++ tc-i386.h Thu May 21 16:50:14 1998 @@ -141,9 +141,11 @@ #ifndef BFD_ASSEMBLER #ifndef OBJ_AOUT #ifndef TE_PE +#ifndef TE_GO32 /* Local labels starts with .L */ #define LOCAL_LABEL(name) (name[0] == '.'
&& (name[1] == 'L' || name[1] == 'X' || name[1] == '.')) +#endif #endif #endif

You have to do binutils first - and install it - because gcc's build requires it.

$ cd ~/djgpp/cross/binu $ ../binutils-2.9.1/configure --target=i586-pc-msdosdjgpp --prefix=/usr/local $ make $ make install

$ cd ../gcc $ ../gcc-2.8.1/configure --target=i586-pc-msdosdjgpp --prefix=/usr/local

If you omit the --prefix, it might not find the djgpp headers you installed.

OK, before you build gcc, edit the Makefile to not do the libgcc1-test target. The edited Makefile should look something like this (note the #'s):

libgcc1-test: libgcc1-test.o native $(GCC_PARTS) @echo "Testing libgcc1. Ignore linker warning messages." # (GCCFORTARGET)(GCC_FOR_TARGET) (GCCF​ORT​ARGET)(GCC_CFLAGS) libgcc1-test.o -o libgcc1-test
# -nostartfiles -nostdlib $(GCC_FOR_TARGET) --print-libgcc-file-name touch libgcc1-test

Note: You can omit this step if the version of bash you're using (type "bash -version") is less than version 2.*.

$ make $ make install

$ cp ~/djgpp/cross/lib/specs /usr/local/lib/gcc-lib/i586-pc-msdosdjgpp/2.8.1/specs

You should now be able to use "i586-pc-msdosdjgpp-gcc" to cross-compile programs from linux to dos!

Note: I did this for convenience:

$ cd /usr/local/bin $ for i in i586-pc-msdosdjgpp-* do ln -s i‘echoi echo </annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.6944em;"></span><span class="mord mathnormal">i</span><span class="mord">‘</span><span class="mord mathnormal">ec</span><span class="mord mathnormal">h</span><span class="mord mathnormal">o</span></span></span></span>i | sed s/i586-pc-msdosdjgpp/dos/ done

Then, you can use "dos-gcc" as well as "i586-pc-msdosdjgpp-gcc"

$ i586-pc-msdosdjgpp-gcc -v Reading specs from /usr/local/lib/gcc-lib/i586-pc-msdosdjgpp/2.8.1/specs gcc version 2.8.1