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The main problem with GCC's optimizer and PCSX2 is that PCSX2 makes some brutally unsafe assumptions about the status of XMM registers. Specifically, PCSX2 expects them to be UNMODIFIED in quite a few places. GCC 4.4 and beyond love to use XMM regs for optimizations implicitly and, as far as I know,, there's no one easy switch to disable the compiler from generating XMM instructions on it's own...

... without also disabling intrinsics, which we need.

One option we've been considering is being more aggressive about freezing/thawing registers and/or flushing XMM registers from the recompiled code prior to calling C functions. But our tests have been pretty slow performance-wise. 5-15% speed loss and such.

It might be feasible to have just GCC compilations do FreezeRegisters for the EmotionEngine's hwRead and hwWrite calls. I'm not sure though, the speed penalty of freezing of regs might out-weigh the benefits of enabling GCC optimizations.

Hey guys, first of all I'd like to thank you all for all the hard work with the linux build, I've been following the svn updates closely and I'm really happy knowing that you hear our feedbacks and try to fix/implement them asap!

Arcum and Gregory already know me from the google code page but I'd like to let all you coders know that I'm willing to help pcsx2 linux in any way possible. I'm not a programmer but I'm a gamer and linux user at heart so I always try to build the latest svn, test with lots of games and report back. Also, I run Ubuntu 10.04 32bit and Sabayon Linux ona a virtual machine, being Ubuntu/Debian one of the most popular distro around I think it'd be nice to have feedback from a Ubuntu user.

Anyway, thank you again for the amazing work and feel free to contact me anytime.

PS.: I know there's no support for svn versions but is this the right place to discuss building issues or anything svn-related or should I use the google code page?

By the way, newest gcc seems to have resolved at least some issues with -0 optimisations, need to check, but it seems to producae a stable result even with -03.

I'm trying to build pcsx2 on Sabayon Linux (gentoo based) and I get the following warnings:

wingnux@sabayon ~/pcsx2-read-only $ cmake CMakeLists.txt
-- Enable the stripping by default in Release build !!!
-- Use internal pcsx2 zlib library
-- Use internal pcsx2 SoundTouch library
-- Configuring done
CMake Warning at pcsx2/CMakeLists.txt:634 (add_executable):
Cannot generate a safe linker search path for target pcsx2 because files in
some directories may conflict with libraries in implicit directories:

link library [libglib-2.0.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libgobject-2.0.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libcairo.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/CDVDiso/src/CMakeLists.txt:72 (add_library):
Cannot generate a safe linker search path for target CDVDiso because files
in some directories may conflict with libraries in implicit directories:

link library [libbz2.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/CDVDiso/src/CMakeLists.txt:72 (add_library):
Cannot generate a safe runtime search path for target CDVDiso because files
in some directories may conflict with libraries in implicit directories:

runtime library [libbz2.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/onepad/CMakeLists.txt:80 (add_library):
Cannot generate a safe linker search path for target onepad because files
in some directories may conflict with libraries in implicit directories:

link library [libSDL.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/spu2-x/src/CMakeLists.txt:115 (add_library):
Cannot generate a safe linker search path for target spu2x because files in
some directories may conflict with libraries in implicit directories:

link library [libasound.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libportaudio.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [liba52.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/zzogl-pg/opengl/CMakeLists.txt:134 (add_library):
Cannot generate a safe linker search path for target zzogl because files in
some directories may conflict with libraries in implicit directories:

link library [libGLEW.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libSM.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libICE.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libX11.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libXext.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib
link library [libXxf86vm.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/zeropad/CMakeLists.txt:88 (add_library):
Cannot generate a safe linker search path for target zeropad because files
in some directories may conflict with libraries in implicit directories:

link library [libSDL.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


CMake Warning at plugins/zerospu2/CMakeLists.txt:91 (add_library):
Cannot generate a safe linker search path for target zerospu2 because files
in some directories may conflict with libraries in implicit directories:

link library [libasound.so] in /usr/lib may be hidden by files in:
/usr/X11R6/lib

Some of these libraries may not be found correctly.


-- Generating done
-- Build files have been written to: /home/wingnux/pcsx2-read-only


Can you guys help me? Compiling doesn't work with these errors.

Is the distribution old ?

What is /usr/X11R6 ? A symlink or a directory ?

Nope, this version was released this month and since it's gentoo based it has an up-to-date package base (more up-to-date than ubuntu/debian).

It's a symlink:

lrwxrwxrwx 1 root root 6 Jun 23 00:19 X11R6 -> ../usr

EDIT: Just removed the symlink and everything went fine, let's hope it doesn't break anything on my system.

EDIT2: This is weird, I have all those dependencies installed but even then...

Quote:-- Could NOT find SparseHash (missing: SPARSEHASH_INCLUDE_DIR)
-- Use internal pcsx2 SoundTouch library
-- Skip build of common libraries: miss some dependencies
-- check these libraries -> wxWidgets (>=2.8.10), sparsehash (>=1.5)
-- Skip build of pcsx2 core: miss some dependencies
-- check these libraries -> wxWidgets (>=2.8.10), gtk2 (>=2.16), zlib (>=1.2.4), pcsx2 common libs
-- Skip build of zzogl: miss some dependencies
-- check these libraries -> glew (>=1.5), jpeg (>=6.2), opengl, X11, nvidia-cg-toolkit (>=2.1), pcsx2 common libs
-- Skip build of spu2-x: miss some dependencies
-- check these libraries -> soundtouch (>=1.5), alsa, portaudio (>=1.9), a52 (>= 0.7.4), pcsx2 common libs
-- Configuring done
-- Generating done

New distro, new problems... I hope arcum42 can shed a light here since he runs gentoo as his main distro.

Well, it could be remove. Recent program does not use it anymore.

For the depencency check the package SparseHash. Maybe my check depends on the version which is bad.

On my system the includes files are
/usr/include/google/sparse_hash_set
/usr/include/google/sparse_hash_map
/usr/include/google/sparsehash
/usr/include/google/sparsehash/sparseconfig.h
/usr/include/google/sparsehash/sparsehashtable.h
/usr/include/google/sparsehash/densehashtable.h
/usr/include/google/dense_hash_set
/usr/include/google/type_traits.h
/usr/include/google/sparsetable
/usr/include/google/dense_hash_map

Have you the same ?

Yeap. I think everything is fine now, just had to add and update the gentoo main repository. I'm building pcsx2, spu2x and zzogl ATM to see how things work out.

EDIT: Hummmmm... something is wrong.

Quote:wingnux@sabayon ~/pcsx2-read-only $ cmake CMakeLists.txt
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- BuildType set to Devel by default
-- Disable the stripping by default in Devel build !!!
-- Use internal version of Soundtouch by default.
Note: There have been issues in the past with sound quality depending on the version of Soundtouch
Use -DFORCE_INTERNAL_SOUNDTOUCH=FALSE at your own risk
-- Found GTK2_GTK: /usr/lib/libgtk-x11-2.0.so
-- Looking for XOpenDisplay in /usr/lib/libX11.so;/usr/lib/libXext.so
-- Looking for XOpenDisplay in /usr/lib/libX11.so;/usr/lib/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
-- Found X11: /usr/lib/libX11.so
-- Found ALSA: /usr/lib/libasound.so
-- Found BZip2: /usr/lib/libbz2.so
-- Looking for BZ2_bzCompressInit in /usr/lib/libbz2.so
-- Looking for BZ2_bzCompressInit in /usr/lib/libbz2.so - found
-- Found JPEG: /usr/lib/libjpeg.so
-- Looking for include files CMAKE_HAVE_PTHREAD_H
-- Looking for include files CMAKE_HAVE_PTHREAD_H - found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found wxWidgets: TRUE
-- Found ZLIB: /usr/lib/libz.so
-- Found A52: /usr/lib/liba52.so
-- Found Cg: /opt/nvidia-cg-toolkit/lib/libCg.so;/opt/nvidia-cg-toolkit/lib/libCgGL.so
-- Found PortAudio: /usr/lib/libportaudio.so
-- Found SparseHash: /usr/include
-- Use internal pcsx2 SoundTouch library
-- Configuring done
-- Generating done
-- Build files have been written to: /home/wingnux/pcsx2-read-only

Just print the error message will be enough.

/home/wingnux/pcsx2-read-only/plugins/zzogl-pg/opengl/zerogs.h:53:19: error: Cg/cg.h: No such file or directory

Nvidia cg tookit include file is missing.

---

Ok I find a bad things. Need to go first to the bakery ^^