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- This is klibc, what is intended to be a minimalistic libc subset for
- use with initramfs. It is deliberately written for small size,
- minimal entanglement, and portability, not speed. It is definitely a
- work in progress, and a lot of things are still missing.
-
-
- The build procedure is not very polished yet, but it should work like
- this:
-
- a) In the source root directory (the directory above the one in which
- this file is found) create a symlink called "linux" pointing to the
- target of "make headers_install" from a recent Linux kernel tree.
- This can be done by extracting the Linux kernel into a directory,
- running "make headers_install" for the appropriate architecture,
- and then making a symlink to the "usr" subdirectory of that directory
- tree.
-
- b) If you're cross-compiling, you need to set KLIBCARCH to the
- appropriate architecture, and set CROSS_COMPILE to your toolchain
- prefix.
-
- IMPORTANT: if you're on a 64-bit machine with a 32-bit userland
- (ia64, mips64, ppc64 sparc64, s390x or x86_64), and you want to
- build the 32-bit version: you need to set KLIBCARCH to the 32-bit
- architecture as well as set up the linux/include/asm symlink to
- point to the 32-bit architecture. Building the 32-bit architecture
- usually (but not always) produces smaller binaries, and is likely
- to be better tested.
-
- If you are on ARM, and want to build a thumb version of the library
- (this is supported), change OPTFLAGS in arch/arm/MCONFIG to build
- thumb code.
-
- The following is the last known status of various architectures:
-
- alpha: Working
- arm-thumb: Untested
- arm: Working
- arm26: Not yet ported
- avr32: Not yet ported
- cris: Working
- h8300: Not yet ported
- i386: Working
- ia64: Working static, shared untested
- m32r: Untested
- m68k: Working
- mips: Working
- mips64: Not yet ported
- parisc: Untested
- parisc64: Not yet ported
- ppc: Working
- ppc64: Working
- s390: Working
- s390x: Working
- sh: Runtime breakage
- sh64: Not yet ported
- sparc: Working
- sparc64: Working
- v850: Not yet ported
- x86-64: Working
- xtensa: Not yet ported
-
- Shared library support requires recent binutils on many
- architectures.
-
- Note that even the "working" ones likely have bugs. Please report
- them if you run into them.
-
- c) Type "make" and pray...
-
- d) Try the test programs in the tests/ directory. They should run...
-
- Contact the klibc mailing list:
-
- http://www.zytor.com/mailman/listinfo/klibc
-
- ... for more info.
-
- -hpa
-