DOS

Compilation

To cross-compile on Linux for DOS:

1. Get packages of the DJGPP cross compiler and install them:

   • djgpp-filesystemdjgpp-gcc
   • djgpp-cpp
   • djgpp-runtime
   • djgpp-binutils

   As an alternative, the DJGPP web site offers packages for download as well:

   • djcross-binutils-2.29.1-1ap.x86_64.rpm
   • djcross-gcc-7.2.0-1ap.x86_64.rpm
   • djcrx-2.05-5.x86_64.rpm

   The cross toolchain packages for your distribution may have slightly different names (look for packages named djgpp).

   Alternatively, you could use a script to build it from scratch: https://github.com/andrewwutw/build-djgpp

2. You will need the libpci and libgetopt library source trees and their compiled static libraries and header files installed in some directory say libpci-libgetopt/, which will be later specified with LIBS_BASE parameter during flashrom compilation. Easiest way to handle it is to put pciutils, libgetopt and flashrom directories in one subdirectory. There will be an extra subdirectory libpci-libgetopt created, which will contain compiled libpci and libgetopt.
3. Download pciutils 3.5.6 and apply File:Pciutils-3.5.6.patch.gz
4. Compile pciutils, using following command line:
   make ZLIB=no DNS=no HOST=i386-djgpp-djgpp CROSS_COMPILE=i586-pc-msdosdjgpp- \
PREFIX=/ DESTDIR=$PWD/../libpci-libgetopt \
STRIP="--strip-program=i586-pc-msdosdjgpp-strip -s" install install-lib
5. Download and compile with 'make' File:Libgetopt.tar.gz
6. Copy the libgetopt.a to ../libpci-libgetopt/lib and getopt.h to ../libpci-libgetopt/include
7. Enter the flashrom directory.
   make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip LIBS_BASE=../libpci-libgetopt/ strip
8. If you like, you can compress the resulting executable with UPX:
   upx -9 flashrom.exe
9. To run flashrom.exe, download File:Csdpmi7b.zip and unpack CWSDPMI.EXE into the current directory or one in PATH.