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diff --git a/FAQ.in b/FAQ.in index 0af71454d4..b142f5bd2d 100644 --- a/FAQ.in +++ b/FAQ.in @@ -832,6 +832,33 @@ passwd_compat: nis group_compat: nis shadow_compat: nis +?? What needs to be recompiled when upgrading from glibc 2.0 to glibc + 2.1? + +{AJ,CG} If you just upgrade the glibc from 2.0.x (x <= 7) to 2.1, binaries +that have been linked against glibc 2.0 will continue to work. + +If you compile your own binaries against glibc 2.1, you also need to +recompile some other libraries. The problem is that libio had to be +changed and therefore libraries that are based or depend on the libio +of glibc, e.g. ncurses or slang, need to be recompiled. If you +experience strange segmentation faults in your programs linked against +glibc 2.1, you might need to recompile your libraries. + +Another problem is that older binaries that were linked statically against +glibc 2.0 will reference the older nss modules (libnss_files.so.1 instead of +libnss_files.so.2), so don't remove them. Also, the old glibc-2.0 compiled +static libraries (libfoo.a) which happen to depend on the older libio +behavior will be broken by the glibc 2.1 upgrade. The idea is to produce a +libcompat.a that people will be able to use to link in if they want to +compile a static library generated against glibc 2.0 into a program on a +glibc 2.1 system. You should just add -lcompat and you should be fine. + +The glibc-compat add-on will provide the libnss_* files and other stuff so +that it is possible to use static library compiled against glibc 2.0 for +development on a glibc 2.1 based system. Please note that this is currently +just an experiment, although the nss modules part should work. + ? Source and binary incompatibilities, and what to do about them @@ -1275,6 +1302,7 @@ Answers were given by: {TK} Thorsten Kukuk, <kukuk@vt.uni-paderborn.de> {GK} Geoffrey Keating, <geoffk@ozemail.com.au> {HJ} H.J. Lu, <hjl@gnu.org> +{CG} Cristian Gafton, <gafton@redhat.com> Local Variables: mode:outline |