Building process for m68k-elf-gcc
Compiler Options Used for Building Userland Programs:
| Options that are passed to m68k-elf-gcc for uClinux and uClibc | |
|---|---|
| -m68000 | Platform is a Motorola 68000 or something that understands the 68000 command set |
| -Os | Optimization for size |
| -g | Produce debugging information in the operating system's native format See also GNU C debugging options |
| -DCONFIG_OPENHARDWARE -DEMBED -Dlinux -D__linux__ -Dunix -D__uClinux__ -D__USE_BSD |
Preprocessor Options that define Macros that are used in the C source code |
| -I/opt/dragonix/uClinux/lib/uClibc/include -I/opt/dragonix/uClinux/lib/libm -I/opt/dragonix/uClinux -I/opt/dragonix/uClinux/linux-2.4.x/include |
Add the directory dir to the list of directories to be searched for header files. Directories named by -I are searched before the standard system include directories. |
| -fno-builtin | Don't recognize built-in functions that do not begin with __builtin_ as prefix. See also Other built-in functions provided by GCC |
| -msep-data | Data and text segments are separated and placed in different regions of memory. See XIP: eXecute In Place, where the .text (code) is executed from FLASH and the .data is loaded into RAM. |
| -c -o ... | |
Using a newer uClibc (e.g. 0.9.15 as of writing this)
The libraries that are used in linking elf programs with the uCdimm and the uClibc are placed in the directory
/opt/dragonix/toolchain/m68k-elf/lib/m68000
Move this directory to m68000-old or something. Following the instructions to compile a the new uClibc libraries, copy all the output files in lib to this directory again, the do a make clean [...unfinished, sorry...]