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Bug 1429 - Compiling static library with -arch fails when linking showimage
Summary: Compiling static library with -arch fails when linking showimage
Status: RESOLVED FIXED
Alias: None
Product: SDL_image
Classification: Unclassified
Component: misc (show other bugs)
Version: 1.2.12
Hardware: x86_64 Mac OS X (All)
: P2 major
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-02-23 10:48 UTC by Gabriel Jacobo
Modified: 2012-02-28 18:59 UTC (History)
0 users

See Also:

Attachments
Fix for sdl2-config line for static libs under OSX (799 bytes, patch)
2012-02-24 04:26 UTC, Gabriel Jacobo 		Details | Diff
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Description Gabriel Jacobo 2012-02-23 10:48:46 UTC 
This happens at least in Lion, with CFLAGS="-arch i386" or CFLAGS="-arch x86_64"
The workaround I'm using is removing showimage from the Makefile


i386:

/bin/sh ./libtool --tag=CC   --mode=link gcc  -I/Users/gabo/ignifuga/dist/osx/include/libpng12 -g -O2 -mmacosx-version-min=10.6 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -I/Users/gabo/ignifuga/dist/osx/include/SDL2 -D_THREAD_SAFE   -o showimage showimage.o libSDL2_image.la -L/Users/gabo/ignifuga/dist/osx/lib /Users/gabo/ignifuga/dist/osx/lib/libSDL2.a -lm -liconv -Wl,-framework,OpenGL -Wl,-framework,ForceFeedback -lobjc -Wl,-framework,Cocoa -Wl,-framework,Carbon -Wl,-framework,IOKit -Wl,-framework,CoreAudio -Wl,-framework,AudioToolbox -Wl,-framework,AudioUnit
libtool: link: gcc -I/Users/gabo/ignifuga/dist/osx/include/libpng12 -g -O2 -mmacosx-version-min=10.6 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -I/Users/gabo/ignifuga/dist/osx/include/SDL2 -D_THREAD_SAFE -o showimage showimage.o -Wl,-framework -Wl,OpenGL -Wl,-framework -Wl,ForceFeedback -Wl,-framework -Wl,Cocoa -Wl,-framework -Wl,Carbon -Wl,-framework -Wl,IOKit -Wl,-framework -Wl,CoreAudio -Wl,-framework -Wl,AudioToolbox -Wl,-framework -Wl,AudioUnit  ./.libs/libSDL2_image.a -L/Users/gabo/ignifuga/dist/osx/lib /Users/gabo/ignifuga/dist/osx/lib/libSDL2.a -lm -liconv -lobjc
ld: warning: ignoring file ./.libs/libSDL2_image.a, file was built for archive which is not the architecture being linked (i386)
Undefined symbols for architecture i386:
  "_IMG_LoadTexture", referenced from:
      _main in showimage.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
make: *** [showimage] Error 1


x86_64:

/bin/sh ./libtool --tag=CC   --mode=link gcc  -I/opt/local/include/libpng14   -g -O2 -mmacosx-version-min=10.6 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch x86_64 -I/Users/gabo/ignifuga/dist/osx/include/SDL2 -D_THREAD_SAFE  -static-libgcc -o showimage showimage.o libSDL2_image.la -L/Users/gabo/ignifuga/dist/osx/lib /Users/gabo/ignifuga/dist/osx/lib/libSDL2.a -lm -liconv -Wl,-framework,OpenGL -Wl,-framework,ForceFeedback -lobjc -Wl,-framework,Cocoa -Wl,-framework,Carbon -Wl,-framework,IOKit -Wl,-framework,CoreAudio -Wl,-framework,AudioToolbox -Wl,-framework,AudioUnit
libtool: link: gcc -I/opt/local/include/libpng14 -g -O2 -mmacosx-version-min=10.6 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch x86_64 -I/Users/gabo/ignifuga/dist/osx/include/SDL2 -D_THREAD_SAFE -static-libgcc -o showimage showimage.o -Wl,-framework -Wl,OpenGL -Wl,-framework -Wl,ForceFeedback -Wl,-framework -Wl,Cocoa -Wl,-framework -Wl,Carbon -Wl,-framework -Wl,IOKit -Wl,-framework -Wl,CoreAudio -Wl,-framework -Wl,AudioToolbox -Wl,-framework -Wl,AudioUnit  ./.libs/libSDL2_image.a -L/Users/gabo/ignifuga/dist/osx/lib /Users/gabo/ignifuga/dist/osx/lib/libSDL2.a -lm -liconv -lobjc
ld: warning: ignoring file ./.libs/libSDL2_image.a, file was built for archive which is not the architecture being linked (x86_64)
Undefined symbols for architecture x86_64:
  "_IMG_LoadTexture", referenced from:
      _main in showimage.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [showimage] Error 1
Comment 1 Gabriel Jacobo 2012-02-23 19:37:16 UTC 
I'm seeing this in SDL_image's showimage as well as in my own projects...I think I've managed to reduce the problem to the sdl2-config --libs line, that gives me:

-L/Users/gabo/ignifuga/dist/osx32/lib /Users/gabo/ignifuga/dist/osx32/lib/libSDL2.a -lm -liconv -Wl,-framework,OpenGL -Wl,-framework,ForceFeedback -lobjc -Wl,-framework,Cocoa -Wl,-framework,Carbon -Wl,-framework,IOKit -Wl,-framework,CoreAudio -Wl,-framework,AudioToolbox -Wl,-framework,AudioUnit

Note that instead of -lSDL2 it's giving out the full path without -l, so it will be statically linked!

This in turns makes the static library generation for SDL_ttf (and SDL_image) look something like:

libtool: link: ar cru .libs/libSDL2_ttf.a /Users/gabo/ignifuga/dist/osx32/lib/libSDL2.a  SDL_ttf.o

So, instead of only archiving SDL_ttf.o it's trying to archive libSDL2.a as well...THIS is the actual problem...removing libSDL2.a by hand from the Makefile solves the issue...

However, if I apply the fix in sdl2-config (changing /Users/gabo/ignifuga/dist/osx32/lib/libSDL2.a by -lSDL2), the configure script for SDL_image halts at "checking for SDL - version >= 2.0.0..."
Comment 2 Gabriel Jacobo 2012-02-24 04:26:53 UTC 
Created attachment 827 [details]
Fix for sdl2-config line for static libs under OSX

Sorry for the brain fart yesterday, it turns out that sleeping on a problem is always a good idea. Anyway, replacing the whole library path for -lSDL2 actually solves the problem, so this patch should solve the issue. SDL_ttf and SDL_image compile statically without issue now.
Comment 3 Sam Lantinga 2012-02-28 18:59:18 UTC 
I don't think we need that hack anymore, thanks!
http://hg.libsdl.org/SDL/rev/6bb657898f55