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| -rw-r--r-- | FAQ.in | 23 |
1 files changed, 22 insertions, 1 deletions
@@ -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 |