diff options
Diffstat (limited to 'INSTALL')
| -rw-r--r-- | INSTALL | 62 |
1 files changed, 30 insertions, 32 deletions
diff --git a/INSTALL b/INSTALL index 0b86eea709..ba75a5bd3a 100644 --- a/INSTALL +++ b/INSTALL @@ -59,9 +59,10 @@ will be used, and CFLAGS sets optimization options for the compiler. `--with-headers=DIRECTORY' Look for kernel header files in DIRECTORY, not `/usr/include'. - Glibc needs information from the kernel's private header files. - Glibc will normally look in `/usr/include' for them, but if you - specify this option, it will look in DIRECTORY instead. + Glibc needs information from the kernel's header files describing + the interface to the kernel. Glibc will normally look in + `/usr/include' for them, but if you specify this option, it will + look in DIRECTORY instead. This option is primarily of use on a system where the headers in `/usr/include' come from an older version of glibc. Conflicts can @@ -347,37 +348,34 @@ Specific advice for GNU/Linux systems ===================================== If you are installing GNU libc on a GNU/Linux system, you need to have -the header files from a 2.2 or newer kernel around for reference. For -some architectures, like ia64, sh and hppa, you need at least headers -from kernel 2.3.99 (sh and hppa) or 2.4.0 (ia64). You do not need to -use that kernel, just have its headers where glibc can access at them. -The easiest way to do this is to unpack it in a directory such as -`/usr/src/linux-2.2.1'. In that directory, run `make config' and -accept all the defaults. Then run `make include/linux/version.h'. -Finally, configure glibc with the option -`--with-headers=/usr/src/linux-2.2.1/include'. Use the most recent -kernel you can get your hands on. - - An alternate tactic is to unpack the 2.2 kernel and run `make -config' as above; then, rename or delete `/usr/include', create a new -`/usr/include', and make symbolic links of `/usr/include/linux' and -`/usr/include/asm' into the kernel sources. You can then configure -glibc with no special options. +the header files from a 2.6.19.1 or newer kernel around for reference. +These headers must be installed using `make headers_install'; the +headers present in the kernel source directory are not suitable for +direct use by GNU libc. You do not need to use that kernel, just have +its headers installed where glibc can access them, referred to here as +INSTALL-DIRECTORY. The easiest way to do this is to unpack it in a +directory such as `/usr/src/linux-VERSION'. In that directory, run +`make headers_install INSTALL_HDR_PATH=INSTALL-DIRECTORY'. Finally, +configure glibc with the option +`--with-headers=INSTALL-DIRECTORY/include'. Use the most recent kernel +you can get your hands on. (If you are cross-compiling GNU libc, you +need to specify `ARCH=ARCHITECTURE' in the `make headers_install' +command, where ARCHITECTURE is the architecture name used by the Linux +kernel, such as `x86' or `powerpc'.) After installing GNU libc, you may need to remove or rename -`/usr/include/linux' and `/usr/include/asm', and replace them with -copies of `include/linux' and `include/asm-$ARCHITECTURE' taken from -the Linux source package which supplied kernel headers for building the -library. ARCHITECTURE will be the machine architecture for which the -library was built, such as `i386' or `alpha'. You do not need to do -this if you did not specify an alternate kernel header source using -`--with-headers'. The intent here is that these directories should be -copies of, *not* symlinks to, the kernel headers used to build the -library. - - Note that `/usr/include/net' and `/usr/include/scsi' should *not* be -symlinks into the kernel sources. GNU libc provides its own versions -of these files. +directories such as `/usr/include/linux' and `/usr/include/asm', and +replace them with copies of directories such as `linux' and `asm' from +`INSTALL-DIRECTORY/include'. All directories present in +`INSTALL-DIRECTORY/include' should be copied, except that GNU libc +provides its own version of `/usr/include/scsi'; the files provided by +the kernel should be copied without replacing those provided by GNU +libc. The `linux', `asm' and `asm-generic' directories are required to +compile programs using GNU libc; the other directories describe +interfaces to the kernel but are not required if not compiling programs +using those interfaces. You do not need to copy kernel headers if you +did not specify an alternate kernel header source using +`--with-headers'. GNU/Linux expects some components of the libc installation to be in `/lib' and some in `/usr/lib'. This is handled automatically if you |