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Re: [egon.schaal@cad-consulting.wn.eunet.de: gnuwin32, ld]
- To: Ian Lance Taylor <ian at cygnus dot com>, gnu-win32 at cygnus dot com
- Subject: Re: [egon.schaal@cad-consulting.wn.eunet.de: gnuwin32, ld]
- From: Mumit Khan <khan at xraylith dot wisc dot edu>
- Date: Sun, 20 Jul 1997 16:34:18 -0500
Ian Lance Taylor <ian@cygnus.com> writes:
> What's the magic option or code to use to avoid this problem?
>
> Ian
[ multiple defs of STL allocator fns problem with gnu-win32 gcc ]
This problem arises when you let gcc instantiate everything statically
in your program units (ie., -fimplicit-templates). This is usually a
bad thing anyway for anything other than tiny toy programs, since the
code bloat is unacceptable in any real software.
Two ways to avoid it:
1. Use -fno-implict-templates (explicit instantiation). Currently
with gcc (IMO) this is the only viable and portable option.
2. Use -frepo. For some reason, gcc on '95 doesn't do this correctly
(collect2/ld doesn't invoke recompilations based on the *.rpo
files). I use linux to build win32 apps, and it works find with
my x-build environment.
Both are documentated (along with the gotchas) in my STL newbie guide
(URL after sig). It's quite dated, but gcc related info is quite
relevant.
Mumit
http://www.xraylith.wisc.edu/~khan/
http://www.xraylith.wisc.edu/~khan/software/stl/STL.newbie.html
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