# $NetBSD: README,v 1.5.4.1 2023/06/03 15:04:06 martin Exp $ BUILD INSTRUCTIONS Building LoadBSD isn't easy since several sources from the NetBSD repository are required. Compiling these sources under AmigaOS without clashes with the native GCC headers requires some knowledge. This document tries to describe the steps necessary to rebuild LoadBSD with a modern AmigaOS gcc, or vbcc with PosixLib. These instructions do only apply for LoadBSD versions using the loadfile() interface. Previous version do only require getopt.c and reboot.h. Note: It is not possible to build LoadBSD with the native NetBSD compiler! LoadBSD is an *AmigaOS* program and must be built with an AmigaOS compiler. Of course, a properly setup cross-compiler does work. Required sources from NetBSD (either HEAD or from a release branch) From src/sys/lib/libsa: loadfile.h,loadfile.c,loadfile_elf32.c,loadfile_aout.c place these files in the directory where you have loadbsd.c From src/sys/arch/m68k/include: aout_machdep.h,elf_machdep.h place these files in: /include/m68k From src/sys/arch/amiga/include: aout_machdep.h,elf_machdep.h,loadfile_machdep.h place these files in: /include/machine From src/sys/sys: exec.h,exec_elf.h,exec_aout.h,aout_mids.h,reboot.h place these files in: /include/sys Additional headers (see below): inttypes.h,namespace.h,lib/libsa/stand.h,lib/libkern/libkern.h place these files in: /include If all the mentioned files are placed at the correct place, loadfile_machdep.h must be modified. The patch is included below. Another small patch to loadfile_aout.c must be applied to fix an incompatibility for LoadBSD. However, that patch breaks loadfile() for other architectures using a.out! Note: This patch is required to be able to suppress loaded symbols when booting ancient a.out kernels that don't support them. Without the patch symbol suppressing doesn't work! That also means ELF isn't affected and LoadBSD could handle it differently but then it could probably break in other unpredictable ways... The headers inttypes.h, namespace.h, include/lib/libsa/stand.h and lib/libkern/libkern.h are listed completely below. Then it should be possible to recompile LoadBSD with gcc6 or newer by typing "make" (or "make -f vmakefile" with vbcc). If make fails, fix the problem and try again :-P Good luck! --- Missing files/patches --- include/machine/loadfile_machdep.h modification: --cut-- --- include/machine/loadfile_machdep.h~ Sun Mar 26 15:46:55 2023 +++ include/machine/loadfile_machdep.h Sun Mar 26 15:47:17 2023 @@ -38,7 +38,7 @@ #define LOAD_KERNEL LOAD_ALL #define COUNT_KERNEL COUNT_ALL -#ifdef _STANDALONE +#if 0 #define LOADADDR(a) ((a) + offset) #define ALIGNENTRY(a) 0 --cut-- loadfile_aout.c modification: --cut-- --- loadfile_aout.c~ Mon Feb 11 21:25:56 2002 +++ loadfile_aout.c Thu Jan 23 10:43:27 2003 @@ -217,8 +217,8 @@ loadfile_aout(fd, x, marks, flags) BCOPY(&x->a_syms, maxp, sizeof(x->a_syms)); if (flags & (LOAD_SYM|COUNT_SYM)) { - maxp += sizeof(x->a_syms); aoutp = maxp; + maxp += sizeof(x->a_syms); } if (x->a_syms > 0) { --cut-- include/inttypes.h: --cut-- #ifndef _INTTYPES_H #define _INTTYPES_H #include #include #ifndef be32toh #define be32toh(x) (x) #endif #ifndef roundup #define roundup(x,y) ((((x)+((y)-1))/(y))*(y)) #endif typedef unsigned long vaddr_t; typedef unsigned long paddr_t; #endif /* !_INTTYPES_H */ --cut-- include/namespace.h --cut-- #define _DIAGASSERT(x) /**/ extern char *program_name; #define getprogname() program_name #ifndef __UNCONST #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) #endif --cut-- include/lib/libsa/stand.h --cut-- #include #include #include #include #include #include #include "inttypes.h" --cut-- include/lib/libkern/libkern.h --cut-- /* nothing, must only exist! */ --cut--