Re: Linker refuses to link my dylib? Why?
Re: Linker refuses to link my dylib? Why?
- Subject: Re: Linker refuses to link my dylib? Why?
- From: Brian Smith <email@hidden>
- Date: Thu, 15 Feb 2007 09:25:14 +0800
On Feb 14, 2007, at 11:36 PM, Theodore H. Smith wrote:
I'm being told that I can't link my product, for some odd reason I
have no clue about. I've no idea where these __TEXT or __DATA
sections come from and to be honest I don't really want to know
about them ;) All I want to do is know about C++ and build a
library. Anyhow I guess I will have to learn what these silly
linker flags are about.
To be honest this seems to be part of the game when using compiled
languages. There are other languages where this is not an issue;o)
So why am I being told these linker errors?
I got the linker errors below and my customised settings below.
cd /Users/theodore/Programming/Making/ElfData/Source
/usr/bin/g++-4.0 -o /Users/theodore/Programming/Making/ElfData/
Source/build/ElfData.build/Deployment/ElfData.build/Objects-normal/
ppc/libElfData.dylib -LElfData/Build\ Resources/Mac\ Carbon\ Mach-O
\ Universal -FElfData/Build\ Resources/Mac\ Carbon\ Mach-O\
Universal -filelist /Users/theodore/Programming/Making/ElfData/
Source/build/ElfData.build/Deployment/ElfData.build/Objects-normal/
ppc/ElfData.LinkFileList -framework Carbon -arch ppc -prebind -Wl,-
single_module -compatibility_version 1 -current_version 1 -
install_name /usr/local/lib/libElfData.dylib -Wl,-Y,1455 -
dynamiclib -mmacosx-version-min=10.3 -Wl,-dead_strip -isysroot /
Developer/SDKs/MacOSX10.3.9.sdk
ld: warning prebinding disabled because (__TEXT segment (address =
0x0 size = 0x2b000) of /Users/theodore/Programming/Making/ElfData/
Source/build/ElfData.build/Deployment/ElfData.build/Objects-normal/
ppc/libElfData.dylib overlaps with __TEXT segment (address = 0x0
size = 0xc000) of /usr/lib/libgcc_s.1.dylib
ld: warning prebinding disabled because (__TEXT segment (address =
0x0 size = 0x2b000) of /Users/theodore/Programming/Making/ElfData/
Source/build/ElfData.build/Deployment/ElfData.build/Objects-normal/
ppc/libElfData.dylib overlaps with __DATA segment (address = 0xc000
size = 0x1000) of /usr/lib/libgcc_s.1.dylib
These warnings suggest that you are trying to tell the linker to
assemble code segments in the same address ranges. The linker is
warning you incase you actually need to assemble the code at specific
memory address, for example when you compile for a custom
microcontroller device, however the linker does rearrange them to
addresses that don't overlap. First check if you have prebindings
turned on in your settings. For 10.3 or greater, you can turn this
off, which should stop these warnings. Also, you may want to look for
setting that would be telling the linker to link your code to a
specific memory address and change it accordingly. (Prebindings is
trying to arrange everything at address 0x0 in this case.)
Brian
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