Am Samstag, 22. Dezember 2012, 16:34:48 schrieben Sie: > On Sat, Dec 22, 2012 at 10:47 AM, Johannes Obermayr > <johannesoberm...@gmx.de> wrote: > > Am Samstag, 22. Dezember 2012, 09:21:33 schrieb Matt Turner: > >> On Sat, Dec 22, 2012 at 9:16 AM, Johannes Obermayr > >> <johannesoberm...@gmx.de> wrote: > >> > This way the user has the privilege of last decision and so the option > >> > to build an optimized debug build again. > >> > --- > >> > >> You can just do CFLAGS="-g -O2" ./configure can't you? > > > > Nope. > > > > CXXFLAGS='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 > > -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g' > > CFLAGS='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector > > -funwind-tables -fasynchronous-unwind-tables -g' ./autogen.sh > > --host=x86_64-suse-linux-gnu --build=x86_64-suse-linux-gnu > > --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin > > --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share > > --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/lib > > --localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man > > --infodir=/usr/share/info --disable-dependency-tracking --enable-xvmc > > --enable-vdpau --enable-texture-float --enable-debug > > --with-dri-drivers=i915,i965,nouveau,r200,radeon,swrast > > --with-gallium-drivers=i915,nouveau,r300,r600,svga,swrast --enable-dri > > --enable-glx --enable-osmesa --enable-gles1 --enable-gles2 --enable-openvg > > --enable-shared-glapi --enable-shared-gallium --enable-gbm --enable-xa - -ena > > ble-gallium-egl --enable-gallium-llvm --enable-gallium-gbm --enable-opencl > > --enable-r600-llvm-compiler --enable-gallium-g3dvl --enable-glx-tls > > > > Resulting Makefile: > > before: > > CFLAGS = -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector > > -funwind-tables -fasynchronous-unwind-tables -g -Wall -std=c99 > > -Werror=implicit-function-declaration -Werror=missing-prototypes > > -fno-strict-aliasing -fno-builtin-memcmp -g -O0 > > > > after: > > CFLAGS = -Wall -std=c99 -Werror=implicit-function-declaration > > -Werror=missing-prototypes -fno-strict-aliasing -fno-builtin-memcmp -g -O0 > > -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector > > -funwind-tables -fasynchronous-unwind-tables -g > > > > You see configure CFLAGS and initial CFLAGS are vice versa. > > The real fix here is not to have configure.ac touch CFLAGS at all like > any reasonable autotools project. That was an unfortunate shortcut > during the initial work. That would be a lot more effort, though.
Initial work after ~ 5 years? http://cgit.freedesktop.org/mesa/mesa/commit/?id=122345876479cf5cf553e38162ab105658614ab7 Btw: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ff2efdf5997d20b41f7a82b77118366e6fbd23bc http://cgit.freedesktop.org/mesa/mesa/commit/?id=33ae29c93b8f70a86dcedc495dd658a5d5679db3 This patch covers the motivation for commit 33ae29c. > > However, the typical convention is that the user's CFLAGS come first > (see any automake COMPILE or LTCOMPILE definition), mostly so that any > user specified -I paths take precedence. That's unfortunate when -O > options to gcc are last one wins, but that's how things have typically > been. I would make this change very cautiously. > > -- > Dan And here is the real reason for my request: /usr/lib64/mesa-demos/egl/opengl/xeglgears AMD Fusion (fps) Nvidia ION (fps) -O0 -O2 -O0 -O2 562,7 750,778 0,33 641,851 921,464 0,44 701,756 662,877 -0,06 693,752 1000,196 0,44 571,566 665,052 0,16 692,196 936,147 0,35 542,715 664,658 0,22 693,733 995,499 0,43 542,935 664,78 0,22 692,702 992,634 0,43 542,574 665,398 0,23 692,835 998,665 0,44 542,945 663,087 0,22 691,353 998,319 0,44 541,732 664,253 0,23 656,32 995,91 0,52 543,392 665,078 0,22 691,084 994,037 0,44 542,901 663,406 0,22 693,464 996,858 0,44 5635,216 6729,367 0,19 6839,29 9829,729 0,44 (sum) -> Performance + 19 % on AMD Fusion, + 44 % on Nvidia ION on debug build with -O2. :-) Usual users should build Mesa with default FLAGS. Advanced users should be able to build it with their own FLAGS without modifying source. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
