diff options
Diffstat (limited to 'FAQ')
| -rw-r--r-- | FAQ | 32 |
1 files changed, 22 insertions, 10 deletions
@@ -260,7 +260,7 @@ incompatibilities: * swapon(): the interface of this function didn't changed, but the prototype is in a separate header file <sys/swap.h>. For the additional - argument of of swapon() you should use the SWAP_* constants from + argument of swapon() you should use the SWAP_* constants from <linux/swap.h>, which get defined when <sys/swap.h> is included. * errno: If a program uses variable "errno", then it _must_ include header @@ -298,6 +298,13 @@ incompatibilities: a separate library libresolv. If you find some symbols starting with `res_*' undefined simply add -lresolv to your call of the linker. +* the `signal' function's behaviour corresponds to the BSD semantic and + not the SysV semantic as it was in libc-5. The interface on all GNU + systems shall be the same and BSD is the semantic of choice. To use + the SysV behaviour simply use `sysv_signal'. The major difference is + that the SysV implementation sets the SA_ONESHOT flag and so the handler + gets removed after the first call. + ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ [Q10] ``Why does getlogin() always return NULL on my Linux box?'' @@ -365,10 +372,10 @@ catalog files to the XPG4 form: [Q13] ``How do I configure GNU libc so that the essential libraries like libc.so go into /lib and the other into /usr/lib?'' -[A13] {UD} Like all other GNU packages GNU libc is configured to use a -base directory and install all files relative to this. If you intend -to really use GNU libc on your system this base directory is /usr. I.e., -you run +[A13] {UD,AJ} Like all other GNU packages GNU libc is configured to +use a base directory and install all files relative to this. If you +intend to really use GNU libc on your system this base directory is +/usr. I.e., you run configure --prefix=/usr <other_options> Some systems like Linux have a filesystem standard which makes a @@ -378,10 +385,10 @@ located on the same disk partition as /. The /usr subtree might be found on another partition/disk. To install the essential libraries which come with GNU libc in /lib -one must explicitly tell this. Autoconf has no option for this so you -have to use the file where all user supplied additional information -should go in: `configparms' (see the `INSTALL' file). For Linux the -`configparms' file should contain: +one must explicitly tell this (except on Linux, see below). Autoconf +has no option for this so you have to use the file where all user +supplied additional information should go in: `configparms' (see the +`INSTALL' file). Therefore the `configparms' file should contain: slibdir=/lib sysconfdir=/etc @@ -390,6 +397,10 @@ The first line specifies the directory for the essential libraries, the second line the directory for file which are by tradition placed in a directory named /etc. +No rule without an exception: If you configure for Linux with +--prefix=/usr, then slibdir and sysconfdir will automatically be +defined as stated above. + ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ [Q14] ``When linking with the new libc I get unresolved symbols @@ -534,7 +545,7 @@ a different name: ld-linux.so.2. So you have to replace by %{!dynamic-linker:-dynamic-linker=/home/gnu/lib/ld.so.1} -in the above example specs file ti make it work for other systems. +in the above example specs file to make it work for other systems. Future versions of GCC will automatically provide the correct specs. @@ -606,6 +617,7 @@ Answers were given by: {DMT} David Mosberger-Tang, <davidm@AZStarNet.com> {RM} Roland McGrath, <roland@gnu.ai.mit.edu> {HJL} H.J. Lu, <hjl@gnu.ai.mit.edu> +{AJ} Andreas Jaeger, <aj@arthur.pfalz.de> Local Variables: mode:text |