port-powerpc/43042: frexp(), ldexp() and modf() are missing from powerpc64 libm/libc

[dennis.c.ferguson%gmail.com@localhost]

>Number:         43042
>Category:       port-powerpc
>Synopsis:       frexp(), ldexp() and modf() are missing from powerpc64 
>libm/libc
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    port-powerpc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 23 09:45:00 +0000 2010
>Originator:     Dennis Ferguson
>Release:        very recent 5.99.24
>Organization:
>Environment:
NetBSD timerxxx.akit-ferguson.com 5.99.24 NetBSD 5.99.24 (GENERIC) #0: Mon Mar 
22 15:11:34 HKT 2010  
dennis%dennisbigmac.akit-ferguson.com@localhost:/Users/dennis/NetBSD/5.0-current/src/sys/arch/amd64/compile/obj/GENERIC
 amd64

>Description:
The floating point functions frexp(), ldexp() and modf(),
which are advertised as being in the math library libm,
aren't there or anywhere else for powerpc64 builds.  Here's
the link of a program which uses frexp():


#      link  grn/grn
/usr/src/obj/tooldir.NetBSD-5.99.24-amd64/bin/powerpc64--netbsd-gcc  
-B/usr/src/obj/destdir.macppc/usr/lib/ -B/usr/src/obj/destdir.macppc/usr/lib/  
-Wl,-nostdlib       -o grn  hdb.o hpoint.o hgraph.o main.o 
/usr/src/gnu/usr.bin/groff/src/libs/libgroff/obj/libgroff.a -lm -lsupc++      
-L/usr/src/obj/destdir.macppc/usr/lib   
-Wl,-rpath-link,/usr/src/obj/destdir.macppc/lib  
-L/usr/src/obj/destdir.macppc/lib 
-Wl,-rpath-link,/usr/src/obj/destdir.macppc/usr/lib  
-L/usr/src/obj/destdir.macppc/usr/lib
hgraph.o: In function `.HGArc(int, int, int, int, int)':
hgraph.cpp:(.text+0xf3c): undefined reference to `.frexp'
collect2: ld returned 1 exit status

*** Failed target:  grn

>How-To-Repeat:
Do a:

    MACHINE=macppc64 ./build.sh distribution
>Fix:
For reasons unknown to me NetBSD compiles these three
functions into libc rather than libm.  The powerpc64
libc configuration forgets to include them, however.

This change to src/lib/libc/compat/arch/powerpc64/gen/Makefile.inc
fixes it:

Index: Makefile.inc
===================================================================
RCS file: /cvsroot/src/lib/libc/compat/arch/powerpc64/gen/Makefile.inc,v
retrieving revision 1.1
diff -u -r1.1 Makefile.inc
--- Makefile.inc        1 Jul 2006 19:17:32 -0000       1.1
+++ Makefile.inc        23 Mar 2010 03:38:06 -0000
@@ -4,4 +4,4 @@
 SRCS+= 
 
 # objects built from C sources in compat/gen
-SRCS+=
+SRCS+= compat_frexp_ieee754.c compat_ldexp_ieee754.c compat_modf_ieee754.c