Compiling on 8.1.0, running on 7.8.0
Compiling on 8.1.0, running on 7.8.0
- Subject: Compiling on 8.1.0, running on 7.8.0
- From: Steve Checkoway <email@hidden>
- Date: Sun, 26 Jun 2005 05:40:14 -0700
I'm sure there is a very simple thing I'm missing here so feel free
to refer me to documentation.
Basically, I'm trying to compile a simple hello world application in
c++ on Darwin 8.1.0 and have it run on Darwin 7.8.0 (earlier would be
nice).
$ uname -vmp
Darwin Kernel Version 8.1.0: Tue May 10 18:16:08 PDT 2005;
root:xnu-792.1.5.obj~4/RELEASE_PPC Power Macintosh powerpc
$ cat temp.cc
#include <cstdio>
int main()
{
puts("Hello World.");
return 0;
}
$ MACOSX_DEPLOYMENT_TARGET=10.3 g++ temp.cc
$ otool -L a.out
a.out:
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0,
current version 7.3.0)
/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0,
current version 1.0.0)
/usr/lib/libmx.A.dylib (compatibility version 1.0.0, current
version 92.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0,
current version 88.0.0)
When I try to run this on a computer running Darwin 7.8.0, it fails:
$ uname -vmp
Darwin Kernel Version 7.8.0: Wed Dec 22 14:26:17 PST 2004; root:xnu/
xnu-517.11.1.obj~1/RELEASE_PPC Power Macintosh powerpc
$ ./a.out
dyld: ./a.out can't open library: /usr/lib/libstdc++.6.dylib (No
such file or directory, errno = 2)
Trace/BPT trap
And indeed, /usr/lib/libstdc++.6.dylib does not exist.
I was under the (clearly mistaken) impression that if I compiled
using the MACOSX_DEPLOYMENT_TARGET environment variable, that the
code would run on the specified system and later using weak linking.
However, if I compile temp.cc on the second computer and run it on
the first, it works as expected. In that case, I get
$ otool -L a.out
a.out:
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0,
current version 71.1.1)
On the other hand, both libstdc++ and libgcc are static libraries
only on the second computer and only dynamic libraries only dynamic
libraries on the first.
Thank you for any assistance with this matter.
- Steve
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