Hi all,

Nicholas Wourms has encountered a segfault on linking qt3, while ld creates the
import library.

Currently I'm investigating some time to fix this and the first results are the
following:

ld uses the function pe_dll_generate_implib (def, impfilename) in pe-dll.c to
create the import library.
For each object file in the import library a bfd object is created. In recent
releases this function eats about 30 KB for each object file. The qt2 import
library contains 12078 objectfile, which needs 350 MB only for generating the
import library and causes the seg fault in the descripted case.

$ nm /usr/local/lib/qt2/lib/libqt.dll.a  | grep ".o:" | wc -l
12078

The related functions are in pe-dll.c

pe_dll_generate_implib(def, impfilename)
	make_one (exp, parent)
		bfd_create()
			_bfd_new_bfd()
!!!!!!!!!!!!!!!!!!!!!!!!!!! These are the functions in which the memory is
allocated
				bfd_zmalloc()
				objalloc_create()
				bfd_hash_table_init()
!!!!!!!!!!!!!!!!!!!!!!!!!!!

With the help of a little malloc debugger under
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/kde-cygwin/tools/mem_watch/which
i can see, that the memory used by make_one() and subfunctions need tweny kilo
bytes more than the  kde-cygwin binutils, which is based on the official
20011102 release. It seems that there are two additional malloc calls in the
objalloc related functions in libiberty.

				make_one (exp, parent)

		new								old
malloc(4064)=1ade29d8 [00487a11]            malloc(4064)=0e7e5ec8 [0047bb95]
malloc(20)=1ade39c0 [0047ea54]              malloc(20)=0e7e6eb0 [00472e1c]
malloc(152)=1ade39d8 [00440fac]             malloc(132)=0e7e6ec8 [0043d7cc]
malloc(12)=1ade3a78 [004878b0]              malloc(12)=0e7e6f50 [0047bad1]
malloc(4064)=1ade3a88 [004878d1]            malloc(4064)=0e7e6f60 [0047bae7]
malloc(12)=1ade4a70 [004878b0]

!malloc(4064)=1ade4a80 [004878d1]
!malloc(16216)=1ade5a68 [004879b4]

malloc(8)=1ade99c8 [00440f28]               malloc(8)=0e7e7f48 [0043d748]
malloc(44)=1ade99d8 [0047ea54]              malloc(44)=0e7e7f58 [00472e1c]
malloc(24)=1ade9a08 [0047ea54]              malloc(35)=0e7e7f88 [00472e1c]
malloc(18)=1ade9a28 [0047ea54]              malloc(18)=0e7e7fb0 [00472e1c]
malloc(30)=1ade9a40 [0047ea54]              malloc(41)=0e7e7fc8 [00472e1c]
malloc(8)=1ade9a68 [0047ea54]               malloc(8)=0e7e7ff8 [00472e1c]
malloc(160)=1ade9a78 [0047ea54]             malloc(160)=0e7e8008 [00472e1c]
malloc(8)=1ade9b20 [0047ea54]               malloc(8)=0e7e80b0 [00472e1c]
malloc(4)=1ade9b30 [0047ea54]               malloc(4)=0e7e80c0 [00472e1c]
malloc(160)=1ade9b40 [0047ea54]             malloc(160)=0e7e80d0 [00472e1c]
malloc(8)=1ade9be8 [0047ea54]               malloc(8)=0e7e8178 [00472e1c]
malloc(4)=1ade9bf8 [0047ea54]               malloc(4)=0e7e8188 [00472e1c]
malloc(160)=1ade9c08 [0047ea54]             malloc(160)=0e7e8198 [00472e1c]
malloc(8)=1ade9cb0 [0047ea54]               malloc(8)=0e7e8240 [00472e1c]
malloc(4)=1ade9cc0 [0047ea54]               malloc(4)=0e7e8250 [00472e1c]
malloc(160)=1ade9cd0 [0047ea54]             malloc(160)=0e7e8260 [00472e1c]
malloc(8)=1ade9d78 [0047ea54]               malloc(8)=0e7e8308 [00472e1c]
malloc(26)=1ade9d88 [0047ea54]              malloc(36)=0e7e8318 [00472e1c]

!malloc(384)=1ade9da8 [00440f67]
!malloc(20)=1adea030 [00440f28]

Any ideas ?

Ralf

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