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Bug 782

Summary: undefined externals in SDL_atomic.c on linux
Product: SDL Reporter: marty leisner <martyleisner>
Component: threadAssignee: Sam Lantinga <slouken>
Status: RESOLVED INVALID QA Contact: Sam Lantinga <slouken>
Severity: critical    
Priority: P2 CC: realburner
Version: HG 2.0   
Hardware: Other   
OS: Linux   

Description marty leisner 2009-08-15 00:16:48 UTC 
I get:
cc -pthread -o demo demo.o  -L/usr/local/SDL-svn-4681//lib  -Wl,-rpath,/usr/local/SDL-svn-4681//lib -lSDL -lSDL_ttf
/usr/local/SDL-svn-4681//lib/libSDL.so: undefined reference to `nativeClear32'
/usr/local/SDL-svn-4681//lib/libSDL.so: undefined reference to `nativeTestThenSet32'

I don't know where these would be (and if they should be expanded by the C compiler)
Comment 1 Sam Lantinga 2009-09-26 03:34:24 UTC 
Can you retest with the current SDL snapshot?
http://www.libsdl.org/tmp/SDL-1.3.zip

Thanks!
Comment 2 Sam Lantinga 2009-09-26 03:41:03 UTC 
*** Bug 799 has been marked as a duplicate of this bug. ***
Comment 3 realburner 2009-10-18 11:25:09 UTC 
you can fix this by applying -march=native to the cflags
Comment 4 Sam Lantinga 2009-12-16 21:01:33 UTC 
Still waiting to hear if this issue is still present in the current snapshot.  I've tested on both 32-bit and 64-bit Linux with no problems.
Comment 5 marty leisner 2009-12-16 23:34:01 UTC 
(In reply to comment #4)
> Still waiting to hear if this issue is still present in the current snapshot. 
> I've tested on both 32-bit and 64-bit Linux with no problems.


I'll look into this some more -- after a configure/make/make install and trying to  configure tests I'm getting:
configure:3241: result: no
configure:3285: gcc -o conftest -g -O2 -I/usr/local/SDL-5384/include/SDL -D_GNU_SOURCE=1 -D_REENTRANT   conftest.c  -L/usr/local/SDL-5384/lib -Wl,-rpath,/usr/local/SDL-5384/lib -lSDL -lpthread >&5
/usr/local/SDL-5384/lib/libSDL.so: undefined reference to `__sync_fetch_and_sub_4'
/usr/local/SDL-5384/lib/libSDL.so: undefined reference to `__sync_sub_and_fetch_4'
/usr/local/SDL-5384/lib/libSDL.so: undefined reference to `__sync_fetch_and_add_4'
/usr/local/SDL-5384/lib/libSDL.so: undefined reference to `__sync_add_and_fetch_4'
collect2: ld returned 1 exit status
configure:3292: $? = 1
configure: failed program was:

These are in SDL_atomic.c, I'll investigate more.

I'm using a ubuntu 7.10 on a PIII for this instance...

marty
Comment 6 Sam Lantinga 2009-12-16 23:49:05 UTC 
What's the version of gcc you're using?
Comment 7 Sam Lantinga 2010-07-12 22:00:06 UTC 
Hey Marty, I haven't been able to reproduce this and I haven't heard from you in a while.  What's the status of this?
Comment 8 Nathaniel J Fries 2011-01-07 12:21:13 UTC 
I did not experience this on Ubuntu 9.04, so either the issue was fixed in GCC before then?

but IIRC those are GCC intrinsics and should have been available.
Comment 9 Sam Lantinga 2011-01-21 12:49:28 UTC 
The atomic code has changed significantly, and if this is still an issue, let's enter a new bug for it.