From scm at ipl.t.u-tokyo.ac.jp  Mon May 22 09:28:31 2006
From: scm at ipl.t.u-tokyo.ac.jp (Shin-Cheng Mu)
Date: Mon May 22 09:21:50 2006
Subject: [nhc-bugs] ld: Undefined symbols on OS X when compiling with -t
Message-ID: <161AEE6A-CE41-4AFF-97BC-0FB5D6331CA0@ipl.t.u-tokyo.ac.jp>

Hi,

I just installed NHC98 using Darwin Ports on a PowerPC
G4 based Mac, running OS X 10.4 with GCC 4.0. NHC works
fine without profiling options. When I turned on time
profiling, however, NHC98 appears to have problems linking:

   scm$ cat text.hs
   main = print (foldr (+) 0 [1..10000])

   scm$ hmake -nhc98 -t text
   nhc98   -t   -c  -o text.z.o text.hs
   nhc98  -t    -o text text.z.o
   /tmp/tprofusr3456.c: In function 'tprofTMInitTreeUsr':
   /tmp/tprofusr3456.c:21: warning: incompatible implicit declaration  
of built-in function 'strdup'
   /usr/bin/ld: Undefined symbols:
   _FN_NHC_46Internal_46_95apply1
   _FN_NHC_46Internal_46_95apply2
   _TMSUB_NHC_46DErrNo
   _TM_NHC_46DErrNo
   _TMSUB_NHC_46PackedString
   _TM_NHC_46PackedString
   collect2: ld returned 1 exit status

Is it a bug, or is something missing in Darwin Ports?

sincerely,
Shin-Cheng Mu

From Malcolm.Wallace at cs.york.ac.uk  Mon May 22 09:53:03 2006
From: Malcolm.Wallace at cs.york.ac.uk (Malcolm Wallace)
Date: Mon May 22 09:51:34 2006
Subject: [nhc-bugs] ld: Undefined symbols on OS X when compiling with -t
In-Reply-To: <161AEE6A-CE41-4AFF-97BC-0FB5D6331CA0@ipl.t.u-tokyo.ac.jp>
References: <161AEE6A-CE41-4AFF-97BC-0FB5D6331CA0@ipl.t.u-tokyo.ac.jp>
Message-ID: <20060522145303.648c9c07.Malcolm.Wallace@cs.york.ac.uk>

Shin-Cheng Mu <scm@ipl.t.u-tokyo.ac.jp> wrote:

>    scm$ hmake -nhc98 -t text
>    nhc98   -t   -c  -o text.z.o text.hs
>    nhc98  -t    -o text text.z.o
>    /usr/bin/ld: Undefined symbols:
>    _FN_NHC_46Internal_46_95apply1
>    _FN_NHC_46Internal_46_95apply2
>    _TMSUB_NHC_46DErrNo
>    _TM_NHC_46DErrNo
>    _TMSUB_NHC_46PackedString
>    _TM_NHC_46PackedString
> 
> Is it a bug, or is something missing in Darwin Ports?

This is a bug.  Unfortunately, the time-profiling code has not been
properly maintained or tested since it was contributed to the main
compiler branch.  (The reason for this particular  breakage is that
time-profiling relies on a post-processor for object files after they
have been built, and this has some some hand-coded hacks for internal
Prelude-like definitions.  When the runtime internals changed, these
hacks were not kept in sync.)

Regards,
    Malcolm
From scm at iis.sinica.edu.tw  Mon May 22 09:39:42 2006
From: scm at iis.sinica.edu.tw (Shin-Cheng Mu)
Date: Fri Jun  2 08:13:57 2006
Subject: [nhc-bugs] Bus Error and Segmentation Fault when Heap Profiling is
	On
Message-ID: <7D6EED92-927D-474C-863C-B16120CF2B28@iis.sinica.edu.tw>

Hi,

This is another potential bug. Unfortunately I currently
cannot reproduce it on smaller programs. I tried to do
heap profiling on the following code:

    http://www.psdlab.org/~scm/hx.tar.gz

The main program is hxpc.hs. I tried to compile it with

    hmake -nhc98 -p hxpc

and run it on a small sample input

    scm$ cat > temp.xml
    <a><b><item>123</item></b><c></c></a>
    scm$ ./hxpc temp.xml
    Bus error
    scm$ ./hxpc temp.xml +RTS -p
    Segmentation fault

Increasing the heap size does not seem to help.

If I compile the program without the -p option, it runs fine.

Since Malcolm Wallace has already profiled the program
on his machine, it seems to be a platform specific problem
I installed NHC98 1.18_4 using Darwin Ports, on a PowerPC
G4 based Mac, running OS X 10.4 and GCC 4.0.

sincerely,
Shin-Cheng Mu