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authorUlrich Drepper <drepper@redhat.com>1999-03-08 11:57:06 +0000
committerUlrich Drepper <drepper@redhat.com>1999-03-08 11:57:06 +0000
commitb93492aaddcd959f47419ca9b44bc2ecca97858b (patch)
treee4f12a2ac507159bc64d614c15a2753924929326 /FAQ
parent7d1de115db4c8b660d12ad1a72cb95ffa7f7a234 (diff)
downloadglibc-b93492aaddcd959f47419ca9b44bc2ecca97858b.tar.gz
Update.
1999-03-02 Mark Kettenis <kettenis@gnu.org> * Makerules (LD_FLAGS-c.so): Add -u __register_frame to force the backward compatibility EH functions to be linked when using gcc-2.8.1. Patch by Zack Weinberg <zack@rabi.columbia.edu>.
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@@ -143,6 +143,8 @@ please let me know.
execute any binaries. What went wrong?
3.19. bonnie reports that char i/o with glibc 2 is much slower than with
libc5. What can be done?
+3.20. Programs compiled with glibc 2.1 can't read db files made with glibc
+ 2.0. What has changed that programs like rpm break?
4. Miscellaneous
@@ -1497,6 +1499,22 @@ suffix `_unlocked', for details check <stdio.h>. Using `putc_unlocked' etc.
instead of `putc' should give nearly the same speed with bonnie (bonnie is a
benchmark program for measuring disk access).
+
+3.20. Programs compiled with glibc 2.1 can't read db files made with glibc
+ 2.0. What has changed that programs like rpm break?
+
+{AJ} The GNU C library 2.1 uses db2 instead of db1 which was used in version
+2.0. The internal formats of the actual db files are different. To convert
+the db files from db1 format to db2 format, you can use the programs
+`db_dump185' and `db_load'. Alternativly programs can be linked with db1
+using `-ldb1' instead of linking with db2 which uses `-ldb'. Linking with
+db1 might be preferable if older programs need to access the db file.
+
+db2 supports the old db1 programming interface and also a new programming
+interface. For compilation with the old API, <db_185.h> has to be included
+(and not <db.h>) and you can link with either `-ldb1' or `-ldb' for either
+of the db formats.
+
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