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Diffstat (limited to 'FAQ')
| -rw-r--r-- | FAQ | 56 |
1 files changed, 56 insertions, 0 deletions
@@ -49,6 +49,12 @@ please let me know. [Q13] ``How do I configure GNU libc so that the essential libraries like libc.so go into /lib and the other into /usr/lib?'' + +[Q14] ``When linking with the new libc I get unresolved symbols + `crypt' and `setkey'. Why aren't these functions in the + libc anymore?'' + +[Q15] ``What are these `add-ons'?'' ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ [Q1] ``What systems does the GNU C Library run on?'' @@ -369,6 +375,56 @@ in a directory named /etc. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ +[Q14] ``When linking with the new libc I get unresolved symbols + `crypt' and `setkey'. Why aren't these functions in the + libc anymore?'' + +[A14] {UD} Remember the US restrictions of exporting cryptographic +programs and source code. Until this law gets abolished we cannot +ship the cryptographic function together with the libc. + +But of course we provide the code and there is an very easy way to use +this code. First get the extra package. People in the US way get it +from the same place they got the GNU libc from. People outside the US +should get the code from ftp.uni-c.dk [129.142.6.74], or another +archive site outside the USA. The README explains how to install the +sources. + +If you already have the crypt code on your system the reason for the +failure is probably that you failed to link with -lcrypt. The crypto +functions are in a separate library to make it possible to export GNU +libc binaries from the US. + + +~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ +[Q15] ``What are these `add-ons'?'' + +[A15] {UD} To avoid complications with external or external source +code some optional parts of the libc are distributed as separate +packages (e.g., the crypt package, see Q14). + +To ease the use as part of GNU libc the installer just has to unpack +the package and tell the configuration script about these additional +subdirectories using the --enable-add-ons option. When you add the +crypt add-on you just have to use + + configure --enable-add-ons=crypt,XXX ... + +where XXX are possible other add-ons and ... means the rest of the +normal option list. + +You can use add-ons also to overwrite some files in glibc. The add-on +system dependent subdirs are search first. It is also possible to add +banner files (use a file named `Banner') or create shared libraries. + +Using add-ons has the big advantage that the makefiles of the GNU libc +can be used. Only some few stub rules must be written to get +everything running. Even handling of architecture dependent +compilation is provided. The GNU libc's sysdeps/ directory shows how +to use this feature. + + +~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Answers were given by: {UD} Ulrich Drepper, <drepper@cygnus.com> |