X-Git-Url: https://nv-tegra.nvidia.com/r/gitweb?p=linux-2.6.git;a=blobdiff_plain;f=README;h=3e264723b863add275e6f32c44762f8d09cfe0a0;hp=2b5844d8cfa0a117284ef5713fb0957e96fd4667;hb=34596dc9e59d7bece16fe5aba08116b49465da26;hpb=f875a1a6650edce859bd21051a22e1c27ac7ea63 diff --git a/README b/README index 2b5844d8cfa..3e264723b86 100644 --- a/README +++ b/README @@ -1,4 +1,4 @@ - Linux kernel release 2.6.xx + Linux kernel release 2.6.xx These are the release notes for Linux version 2.6. Read them carefully, as they tell you what this is all about, explain how to install the @@ -6,23 +6,31 @@ kernel, and what to do if something goes wrong. WHAT IS LINUX? - Linux is a Unix clone written from scratch by Linus Torvalds with - assistance from a loosely-knit team of hackers across the Net. - It aims towards POSIX compliance. + Linux is a clone of the operating system Unix, written from scratch by + Linus Torvalds with assistance from a loosely-knit team of hackers across + the Net. It aims towards POSIX and Single UNIX Specification compliance. - It has all the features you would expect in a modern fully-fledged - Unix, including true multitasking, virtual memory, shared libraries, - demand loading, shared copy-on-write executables, proper memory - management and TCP/IP networking. + It has all the features you would expect in a modern fully-fledged Unix, + including true multitasking, virtual memory, shared libraries, demand + loading, shared copy-on-write executables, proper memory management, + and multistack networking including IPv4 and IPv6. It is distributed under the GNU General Public License - see the accompanying COPYING file for more details. ON WHAT HARDWARE DOES IT RUN? - Linux was first developed for 386/486-based PCs. These days it also - runs on ARMs, DEC Alphas, SUN Sparcs, M68000 machines (like Atari and - Amiga), MIPS and PowerPC, and others. + Although originally developed first for 32-bit x86-based PCs (386 or higher), + today Linux also runs on (at least) the Compaq Alpha AXP, Sun SPARC and + UltraSPARC, Motorola 68000, PowerPC, PowerPC64, ARM, Hitachi SuperH, + IBM S/390, MIPS, HP PA-RISC, Intel IA-64, DEC VAX, AMD x86-64, AXIS CRIS, + and Renesas M32R architectures. + + Linux is easily portable to most general-purpose 32- or 64-bit architectures + as long as they have a paged memory management unit (PMMU) and a port of the + GNU C compiler (gcc) (part of The GNU Compiler Collection, GCC). Linux has + also been ported to a number of architectures without a PMMU, although + functionality is then obviously somewhat limited. DOCUMENTATION: @@ -54,6 +62,10 @@ INSTALLING the kernel: gzip -cd linux-2.6.XX.tar.gz | tar xvf - + or + bzip2 -dc linux-2.6.XX.tar.bz2 | tar xvf - + + Replace "XX" with the version number of the latest kernel. Do NOT use the /usr/src/linux area! This area has a (usually @@ -62,7 +74,7 @@ INSTALLING the kernel: whatever the kernel-du-jour happens to be. - You can also upgrade between 2.6.xx releases by patching. Patches are - distributed in the traditional gzip and the new bzip2 format. To + distributed in the traditional gzip and the newer bzip2 format. To install by patching, get all the newer patch files, enter the top level directory of the kernel source (linux-2.6.xx) and execute: @@ -77,6 +89,11 @@ INSTALLING the kernel: failed patches (xxx# or xxx.rej). If there are, either you or me has made a mistake. + Unlike patches for the 2.6.x kernels, patches for the 2.6.x.y kernels + (also known as the -stable kernels) are not incremental but instead apply + directly to the base 2.6.x kernel. Please read + Documentation/applying-patches.txt for more information. + Alternatively, the script patch-kernel can be used to automate this process. It determines the current kernel version and applies any patches found. @@ -148,10 +165,31 @@ CONFIGURING the kernel: "make xconfig" X windows (Qt) based configuration tool. "make gconfig" X windows (Gtk) based configuration tool. "make oldconfig" Default all questions based on the contents of - your existing ./.config file. + your existing ./.config file and asking about + new config symbols. "make silentoldconfig" Like above, but avoids cluttering the screen - with question already answered. + with questions already answered. + "make defconfig" Create a ./.config file by using the default + symbol values from arch/$ARCH/defconfig. + "make allyesconfig" + Create a ./.config file by setting symbol + values to 'y' as much as possible. + "make allmodconfig" + Create a ./.config file by setting symbol + values to 'm' as much as possible. + "make allnoconfig" Create a ./.config file by setting symbol + values to 'n' as much as possible. + "make randconfig" Create a ./.config file by setting symbol + values to random values. + + The allyesconfig/allmodconfig/allnoconfig/randconfig variants can + also use the environment variable KCONFIG_ALLCONFIG to specify a + filename that contains config options that the user requires to be + set to a specific value. If KCONFIG_ALLCONFIG=filename is not used, + "make *config" checks for a file named "all{yes/mod/no/random}.config" + for symbol values that are to be forced. If this file is not found, + it checks for a file named "all.config" to contain forced values. NOTES on "make config": - having unnecessary drivers will make the kernel bigger, and can @@ -174,11 +212,8 @@ CONFIGURING the kernel: COMPILING the kernel: - - Make sure you have gcc 2.95.3 available. - gcc 2.91.66 (egcs-1.1.2), and gcc 2.7.2.3 are known to miscompile - some parts of the kernel, and are *no longer supported*. - Also remember to upgrade your binutils package (for as/ld/nm and company) - if necessary. For more information, refer to Documentation/Changes. + - Make sure you have at least gcc 3.2 available. + For more information, refer to Documentation/Changes. Please note that you can still run a.out user programs with this kernel. @@ -199,9 +234,9 @@ COMPILING the kernel: are installing a new kernel with the same version number as your working kernel, make a backup of your modules directory before you do a "make modules_install". - In alternative, before compiling, edit your Makefile and change the - "EXTRAVERSION" line - its content is appended to the regular kernel - version. + Alternatively, before compiling, use the kernel config option + "LOCALVERSION" to append a unique suffix to the regular kernel version. + LOCALVERSION can be set in the "General Setup" menu. - In order to boot your new kernel, you'll need to copy the kernel image (e.g. .../linux/arch/i386/boot/bzImage after compilation)