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[Bug other/42333] complex division failure on darwin10 with -lm
- From: "howarth at nitro dot med dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 9 Dec 2009 18:40:56 -0000
- Subject: [Bug other/42333] complex division failure on darwin10 with -lm
- References: <bug-42333-578@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #26 from howarth at nitro dot med dot uc dot edu 2009-12-09 18:40 -------
I am still a bit confused about this bug. When we leave -lm out of the linkage
of builtin-math-7.exe, where does the ___divdc3 call get resolved from?
Shouldn't it be coming libSystem since that always appears first on the command
line?
http://developer.apple.com/mac/library/documentation/Porting/Conceptual/PortingUnix/compiling/compiling.html
suggests that should be the case...
The libSystem library also includes functions that you would normally expect to
find in libc and libm, RPC services, and a name resolver. Because libSystem is
automatically linked into your application, you do not need to explicitly add
it to the compiler?s link line. For your convenience, many of these libraries
exist as symbolic links to libSystem, so while explicitly linking against -lm
(for example) is not needed, it will not cause an error.
So this sounds more like an darwin linker bug.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42333