[ новости /+++ | форум | теги | ]

4. Installing as a test library.

This section covers installing glibc 2 as a test library. Anything you compile will be linked to your existing libraries unless you give some extra parameters to link to the new libraries. It appears that the paths are compiled into quite a few files, so you probably have to install the library from source.

4.1 Compiling and installing.

Prerequisites.

• About 150 MB free disk space
• GNU make 3.75
• gcc >= 2.7.2 (better 2.7.2.1)
• binutils 2.8.1 (for alpha you need a snapshot)
• bash 2.0
• autoconf 2.12 (if you change configure.in)
• texinfo 3.11

On an i586@133 with 64 MB of RAM, it takes about 3 hours to compile with full libraries with add-ons. On a loaded i686@200, it takes about half an hour.

Extracting the source.

You need to extract the source from the archives so you can compile it. The best way to do this is:

 tar xzf glibc-2.0.6.tar.gz
 cd glibc-2.0.6
 tar xzf ../glibc-linuxthreads-2.0.6.tar.gz
 tar xzf ../glibc-crypt-2.0.6.tar.gz
 tar xzf ../glibc-localedata-2.0.6.tar.gz
 

Configuring.

In the glibc-2.0.6 directory, create a directory named compile, and cd into it. All work will be done in this directory, which will simplify cleaning up. (The developers have not been very concerned with getting 'make clean' perfect yet.)

 mkdir compile
 cd compile
 

 ../configure --enable-add-ons=linuxthreads,crypt,localedata --prefix=/usr/i486-linuxglibc2
 

Compiling and installing.

To compile and verify, run:

 make
 make check
 

 make install
 

4.2 Updating the dynamic loader.

1. Create a link from the new ld.so to /lib/ld-linux.so.2:

    ln -s /usr/i486-linuxglibc2/lib/ld-linux.so.2 /lib/ld-linux.so.2
    
   

   This is the only library where the location is fixed once a program is linked, and using a link in /lib will ease upgrading to glibc as your primary C library when the stable version is released.
2. Edit /etc/ld.so.conf. You need to add path to the lib directory the new libraries reside in at the end of the file, which will be <prefix>/lib, such as /usr/i486-linuxglibc2/lib for the choice above. After you have modified /etc/ld.so.conf, run

    ldconfig -v
    
   

4.3 Configuring for gcc.

The last step of installation is updating /usr/lib/gcc-lib so gcc knows how to use the new libraries. First you need to duplicate the existing configuration. To find out which configuration is current, use the -v option of gcc:

 % gcc -v
 Reading specs from /usr/lib/gcc-lib/i486-unknown-linux/2.7.2.2/specs
 gcc version 2.7.2.2
 

 cd /usr/lib/gcc-lib/
 cp -r i486-unknown-linux i486-linuxglibc2
 

 cd /usr/lib/gcc-lib/i486-linuxglibc2/2.7.2.2
 

4.4 Updating header file links.

You need create links in your new include directory to other include directories:

 cd /usr/i486-linuxglibc2/include
 ln -s /usr/src/linux/include/linux
 ln -s /usr/src/linux/include/asm
 ln -s /usr/X11R6/include/X11
 

4.5 Testing your installation.

To test the installation, create the following program in a file glibc.c:

 #include <stdio.h>

 main()
 {
     printf("hello world!\n");
 }
 

 % gcc -b i486-linuxglibc2 -nostdinc -I/usr/i486-linuxglibc2/include -I/usr/lib/gcc-lib/i486-linuxglibc2/2.7.2.2/include glibc.c -o glibc
 

 % ldd glibc
 libc.so.6 => /usr/i486-linuxglibc2/lib/libc-2.0.6.so (0x4000d000)
 /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
 

Партнёры:

Хостинг: