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Ulrich Drepper 1998-09-09 11:46:18 +00:00
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@ -85,6 +85,10 @@ system's tools.
Always get the newest release of GNU binutils available. Older releases are
known to have bugs that prevent a successful compilation.
{AJ} Please don't use binutils 2.7. That release contains some bugs which
might make it necessary that you've got to recompile all your glibc2
binaries when upgrading the GNU C library.
{ZW} As of release 2.1 a linker supporting symbol versions is required. For
Linux, get binutils-2.8.1.0.23 or later. Other systems may have native
linker support, but it's moot right now, because glibc has not been ported
@ -300,6 +304,23 @@ There are some failures which are not directly related to the GNU libc:
the test cases in the math subdirectory will fail. The current Linux 2.1
development kernels have fixes for the floating point support on Alpha.
?? What is symbol versioning good for? Do I need it?
{AJ} Symbol versioning solves problems that are related to interface
changes. One version of an interface might have been introduced in a
previous version of the GNU C library but the interface or the semantics of
the function has been changed in the meantime. For binary compatibility
with the old library, a newer library needs to still have the old interface
for old programs. On the other hand new programs should use the new
interface. Symbol versioning is the solution for this problem. The GNU
libc version 2.1 uses by default symbol versioning if the binutils support
it.
We don't advise to build without symbol versioning since you lose binary
compatibility if you do - for ever! The binary compatibility you lose is
not only against the previous version of the GNU libc (version 2.0) but also
against future versions.
? Installation and configuration issues
@ -600,7 +621,7 @@ file is usually the culprit.
{AJ} If you have an entry "db" in /etc/nsswitch.conf you should also create
the database files. The glibc sources contain a Makefile which does the
neccessary conversion and calls to create those files. The file is
necessary conversion and calls to create those files. The file is
`db-Makefile' in the subdirectory `nss' and you can call it with `make -f
db-Makefile'. Please note that not all services are capable of using a
database. Currently passwd, group, ethers, protocol, rpc, services shadow