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-rw-r--r--FAQ32
1 files changed, 22 insertions, 10 deletions
diff --git a/FAQ b/FAQ
index e5b18bf..642dfee 100644
--- a/FAQ
+++ b/FAQ
@@ -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>
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