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Curious linker errors
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Curious linker errors


  • Subject: Curious linker errors
  • From: Issac Trotts <email@hidden>
  • Date: Mon, 30 Mar 2009 21:24:26 -0700

Hi Xcode users,

I'm having some trouble with linking, not sure why. When I try to call
C functions from Objective C, the linker says the symbols for the
called functions are undefined. I suspect this has to do with having
previous versions of the C files with .cpp or .mm extensions, but
can't say for sure.

I had a similar problem with linking of global variables (serves me
right for using globals I guess). That problem went away when I made
new files globals.h and globals.m, and moved the globals into them. I
have no idea why that worked.

Issac


Building target “Zoominous” of project “Zoominous” with configuration “Debug”

Checking Dependencies

Ld /Users/issactrotts/xcode_build_products/Debug/Zoominous.app/Contents/MacOS/Zoominous
normal i386

    cd /Users/issactrotts/Documents/Zoominous

    setenv MACOSX_DEPLOYMENT_TARGET 10.5

    /Developer/usr/bin/gcc-4.0 -arch i386 -isysroot
/Developer/SDKs/MacOSX10.5.sdk
-L/Users/issactrotts/xcode_build_products/Debug
-L/usr/local/mysql-5.1.32-osx10.5-x86/lib
-F/Users/issactrotts/xcode_build_products/Debug -filelist
/Users/issactrotts/xcode_build_products/Zoominous.build/Debug/Zoominous.build/Objects-normal/i386/Zoominous.LinkFileList
-mmacosx-version-min=10.5 -framework Cocoa -lmysqlclient -framework
OpenGL -framework GLUT -o
/Users/issactrotts/xcode_build_products/Debug/Zoominous.app/Contents/MacOS/Zoominous

Undefined symbols:

  "_dataset_bounds_microns", referenced from:

      -[GlView reset_camera] in GlView.o

  "_load_datasets_list", referenced from:

      -[GlView prepare] in GlView.o

  "_stackvis_load_dataset", referenced from:

      _load_random_dataset in GlView.o

  "_trackball", referenced from:

      -[GlView reset_camera] in GlView.o

  "_init_sql", referenced from:

      -[GlView prepare] in GlView.o

ld: symbol(s) not found

collect2: ld returned 1 exit status
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