Mon Jul 8 13:37:40 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>

* math/math.h (_Mfloat_, _Mlong_double_): New macros, defined iff not
	already defined to float, long double.  Use those macros for _Mdouble_
	defns when including mathcalls.h.
	* math/Makefile [$(long-double-fcts) != yes] (CPPFLAGS): Append
	-D_Mlong_double_=double.

	Add more -lm functions to -lc because ldexp uses them.
	* math/Makefile (calls): Add s_finite, s_copysign, s_scalbn, s_modf.
	(routines): Remove s_modf, add s_frexpf, s_ldexpf; all but frexp and
	ldexp have both f and l code, and those have f though not l code.

 	memcpy for possibly overlapping strings.

ChangeLog

@@ -1,7 +1,20 @@
+Mon Jul  8 13:37:40 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>
+
+	* math/math.h (_Mfloat_, _Mlong_double_): New macros, defined iff not
+	already defined to float, long double.  Use those macros for _Mdouble_
+	defns when including mathcalls.h.
+	* math/Makefile [$(long-double-fcts) != yes] (CPPFLAGS): Append
+	-D_Mlong_double_=double.
+
+	Add more -lm functions to -lc because ldexp uses them.
+	* math/Makefile (calls): Add s_finite, s_copysign, s_scalbn, s_modf.
+	(routines): Remove s_modf, add s_frexpf, s_ldexpf; all but frexp and
+	ldexp have both f and l code, and those have f though not l code.
+
 Mon Jul  8 13:10:50 1996  Michael I. Bushnell p/BSG  <mib@psilocin.gnu.ai.mit.edu>
 
 	* string/argz-delete.c (argz_delete): Use memmove instead of
- 	memcpy for possbly overlapping strings.
+ 	memcpy for possibly overlapping strings.
 
 Mon Jul  8 02:14:25 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>
 

FAQ

@@ -34,14 +34,15 @@ please let me know.
 [Q7]	``When I run `nm -u libc.so' on the produced library I still
 	  find unresolved symbols?  Can this be ok?''
 
-[Q8]	``I expect GNU libc to be 100% source code compatible with
+[Q8]	``Can I replace the libc on my Linux system with GNU libc?''
+
+[Q9]	``I expect GNU libc to be 100% source code compatible with
 	  the old Linux based GNU libc.  Why isn't it like this?''
 
-[Q9]	``Why does getlogin() always return NULL on my Linux box?''
+[Q10]	``Why does getlogin() always return NULL on my Linux box?''
 
-[Q10]	``Where are the DST_* constants found in <sys/time.h> on many
+[Q11]	``Where are the DST_* constants found in <sys/time.h> on many
 	  systems?''
-
 
 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
 [Q1]	``What systems does the GNU C Library run on?''
@@ -137,8 +138,8 @@ Library.
   You should avoid compiling on a NFS mounted device.  This is very
   slow.
 
-* plenty of time (approx 1h for i386-linux on i586@133 or 2.5h or
+* plenty of time (approx 1h for i386-linux on i586@133 or 2.5h on
-  i486@66).
+  i486@66 or 4.5h on i486@33).
 
   If you have some more measurements let me know.
 
@@ -179,10 +180,27 @@ errors while linking before deciding there is a problem.
 
 
 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
-[Q8]	``I expect GNU libc to be 100% source code compatible with
+[Q8]	``Can I replace the libc on my Linux system with GNU libc?''
+
+[A8] {UD} You cannot replace any existing libc for Linux with GNU
+libc.  There are different versions of C libraries and you can run
+libcs with different major version independently.
+
+For Linux there are today two libc versions:
+	libc-4		old a.out libc
+	libc-5		current ELF libc
+
+GNU libc will have the major number 6 and therefore you can have this
+additionally installed.  For more information consult documenation for
+shared library handling.  The Makefiles of GNU libc will automatically
+generate the needed symbolic links which the linker will use.
+
+
+~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
+[Q9]	``I expect GNU libc to be 100% source code compatible with
 	  the old Linux based GNU libc.  Why isn't it like this?''
 
-[A8] {DMT,UD} Not every extension in Linux libc's history was well
+[A9] {DMT,UD} Not every extension in Linux libc's history was well
 thought-out.  In fact it had a lot of problems with standards compliance
 and with cleanliness.  With the introduction of a new version number these
 errors now can be corrected.  Here is a list of the known source code
@@ -246,11 +264,16 @@ incompatibilities:
   upgrading to a newer lpd should fix this problem (e.g., the 4.4BSD
   lpd is known to be working).
 
+* resolver functions/BIND: like on many other systems the functions of
+  the resolver library are not included in the libc itself.  There is
+  a separate library libresolv.  If you find some symbols starting with
+  `res_*' undefined simply add -lresolv to your call of the linker.
+
 
 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
-[Q9]	``Why does getlogin() always return NULL on my Linux box?''
+[Q10]	``Why does getlogin() always return NULL on my Linux box?''
 
-[A9] {UD} The GNU C library has a format for the UTMP and WTMP file
+[A10] {UD} The GNU C library has a format for the UTMP and WTMP file
 which differs from what your system currently has.  It was extended to
 fulfill the needs of the next years when IPv6 is introduced.  So the
 record size is different, fields might have a different position and
@@ -262,12 +285,12 @@ means to support the new techniques later.
 
 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
 
-[Q10]	``Where are the DST_* constants found in <sys/time.h> on many
+[Q11]	``Where are the DST_* constants found in <sys/time.h> on many
 	  systems?''
 
-[A10] {UD} These constants come from the old BSD days and are not used
+[A11] {UD} These constants come from the old BSD days and are not used
 today anymore (even the Linux based glibc does not implement the handling
-although the cosntants are defined).
+although the constants are defined).
 
 Instead GNU libc contains the zone database handling and compatibility
 code for POSIX TZ environment variable handling.

NEWS

@@ -205,7 +205,8 @@ Version 2.0
 * We have incorporated the 4.4 BSD `db' library (version 1.85).  New header
   files <db.h> and <mpool.h> provide a rich set of functions for several
   types of simple databases stored in memory and in files, and <ndbm.h> is
-  an old `ndbm'-compatbile interface using the `db' functions.
+  an old `ndbm'-compatbile interface using the `db' functions.  Link with
+  `-ldb' to get these functions.
 
 * New macro `strdupa' copies a string like `strdup', but uses local stack
   space from `alloca' instead of dynamic heap space from `malloc'.

math/math.h

@@ -62,19 +62,26 @@ __BEGIN_DECLS
 
 #ifdef __USE_MISC
 
-/* Include the file of declarations again, this type using `float'
+
+/* Include the file of declarations again, this time using `float'
    instead of `double' and appending f to each function name.  */
 
-#define _Mdouble_ 		float
+#ifndef _Mfloat_
+#define _Mfloat_		float
+#endif
+#define _Mdouble_ 		_Mfloat_
 #define __MATH_PRECNAME(name,r)	name##f##r
 #include <mathcalls.h>
 #undef	_Mdouble_
 #undef	__MATH_PRECNAME
 
-/* Include the file of declarations again, this type using `long double'
+/* Include the file of declarations again, this time using `long double'
    instead of `double' and appending l to each function name.  */
 
-#define _Mdouble_ 		long double
+#ifndef _Mlong_double_
+#define _Mlong_double_		long double
+#endif
+#define _Mdouble_ 		_Mlong_double_
 #define __MATH_PRECNAME(name,r)	name##l##r
 #include <mathcalls.h>
 #undef	_Mdouble_