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Bug 393

Summary: libsdl-1.2.11 fails to build with yasm-0.5.0
Product: SDL Reporter: Pablo De Napoli <pdenapo>
Component: buildAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P1 CC: vapier
Version: 1.2.11   
Hardware: x86   
OS: Linux   
Attachments: sdl-yasm-sections.patch

Description Pablo De Napoli 2007-02-20 08:35:58 UTC 
I'm having problems with building libdsl-1.2.11-r1
from the sources
(using Gentoo ebuild)
[also I've tried compiling the sources in svn
by hand, it didn't work either]

./build-scripts/strip_fPIC.sh /usr/bin/yasm -f elf -I ./src/hermes/
-DHIDDEN_VISIBILITY ./src/hermes/mmx_main.asm  -fPIC -DPIC -o
build/.libs/mmx_main.o
/usr/bin/yasm -f elf -I ./src/hermes/ -DHIDDEN_VISIBILITY
./src/hermes/mmx_main.asm -o build/.libs/mmx_main.o
./src/hermes/mmx_main.asm:75: invalid argument to [SECTION]
./src/hermes/mmx_main.asm:75: undefined symbol `.note.GNU' (first use)
./src/hermes/mmx_main.asm:75: undefined symbol `stack' (first use)
./src/hermes/mmx_main.asm:75:  (Each undefined symbol is reported only once.)
make: *** [build/mmx_main.lo] Error 1

The problem is caused by the lines

%ifidn __OUTPUT_FORMAT__,elf
section ".note.GNU-stack" noalloc noexec nowrite progbits
%endif
%ifidn __YASM_OBJFMT__,elf
section ".note.GNU-stack" noalloc noexec nowrite progbits
%endif

at the end of every .asm file
(it seems that there is something that yasm-0.5
does not understand)

The problem is described is also reported by 
someone else in the Gentoo bug tracking system

http://bugs.gentoo.org/show_bug.cgi?id=16305

I'm using binutils-2.16.1 gcc-4.1.2 
yasm-0.5
[however, it compilation did work with yasm-0.4]


This problem is not Gentoo specific, as it is
also reported in

http://www.slacky.it/forum/viewtopic.php?t=17322

by a Slackware user.
Comment 1 Ryan C. Gordon 2007-02-20 15:51:56 UTC 
Adding Mike Frysinger to the CC list for this bug, since he's our resident Gentoo ninja (and possibly wrote the yasm code in SDL, too.)

This was on an x86, right? (maybe amd64?)

--ryan.
Comment 2 Pablo De Napoli 2007-02-20 21:45:50 UTC 
yes, it is on an x86 (AMD athlon) machine
Comment 3 Mike Frysinger 2007-02-20 22:03:33 UTC 
the problem is that older yasm's did not respect __OUTPUT_FORMAT__ ... i asked yasm guys to output that to be compatible with nasm and they did, but then we hit the problem where nasm accepts things like dots and dashes in the section name without being quoted but yasm does not

upstream yasm has fixed this for their next version, but for 0.5.0 the syntax has to be:
.section ".note.GNU-stack" ...

i could tweak the test in configure.in so that if yasm is found but it fails to compile this:
%ifidn __OUTPUT_FORMAT__,elf
section .note.GNU-stack noalloc noexec nowrite progbits
%endif
we fall back to using nasm
Comment 4 Mike Frysinger 2007-02-20 22:29:33 UTC 
Created attachment 192 [details]
sdl-yasm-sections.patch

this should do it nicely i think
Comment 5 Ryan C. Gordon 2007-06-02 13:59:00 UTC 
Bumping a bunch of bugs to Priority 1 for consideration for the 1.2.12 release.

--ryan.
Comment 6 Ryan C. Gordon 2007-06-04 04:08:57 UTC 
Fixed in svn revision #3043 for the 1.2 branch and #3044 for the 1.3 branch.

Thanks!

--ryan.