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Thomas Petazzoni 54bbe600ec configure.ac: rework -latomic check 
The configure.ac logic added in commit
2ef7f23820 ("configure: check if
-latomic is needed for __atomic_*") makes the assumption that if a
64-bit atomic intrinsic test program fails to link without -latomic,
it is because we must use -latomic.

Unfortunately, this is not completely correct: libatomic only appeared
in gcc 4.8, and therefore gcc versions before that will not have
libatomic, and therefore don't provide atomic intrinsics for all
architectures. This issue was for example encountered on PowerPC with
a gcc 4.7 toolchain, where the build fails with:

powerpc-ctng_e500v2-linux-gnuspe/bin/ld: cannot find -latomic

This commit aims at fixing that, by not assuming -latomic is
available. The commit re-organizes the atomic intrinsics detection as
follows:

 (1) Test if a program using 64-bit atomic intrinsics links properly,
     without -latomic. If this is the case, we have atomic intrinsics,
     and we're good to go.

 (2) If (1) has failed, then test to link the same program, but this
     time with -latomic in LDFLAGS. If this is the case, then we have
     atomic intrinsics, provided we link with -latomic.

This has been tested in three situations:

 - On x86-64, where atomic instrinsics are all built-in, with no need
   for libatomic. In this case, config.log contains:

   GCC_ATOMIC_BUILTINS_SUPPORTED_FALSE='#'
   GCC_ATOMIC_BUILTINS_SUPPORTED_TRUE=''
   LIBATOMIC_LIBS=''

   This means: atomic intrinsics are available, and we don't need to
   link with libatomic.

 - On NIOS2, where atomic intrinsics are available, but some of them
   (64-bit ones) require using libatomic. In this case, config.log
   contains:

   GCC_ATOMIC_BUILTINS_SUPPORTED_FALSE='#'
   GCC_ATOMIC_BUILTINS_SUPPORTED_TRUE=''
   LIBATOMIC_LIBS='-latomic'

   This means: atomic intrinsics are available, and we need to link
   with libatomic.

 - On PowerPC with an old gcc 4.7 toolchain, where 32-bit atomic
   instrinsics are available, but not 64-bit atomic instrinsics, and
   there is no libatomic. In this case, config.log contains:

   GCC_ATOMIC_BUILTINS_SUPPORTED_FALSE=''
   GCC_ATOMIC_BUILTINS_SUPPORTED_TRUE='#'

   With means that atomic intrinsics are not usable.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-05-10 08:13:57 -07:00
bin bin: force git show to use default pretty setting 2018-04-27 10:19:55 -07:00
build-support configure: commit test files 2017-10-16 16:32:43 -07:00
docs docs: update calendar, add news and link release notes to 18.0.3 2018-05-07 11:25:54 +00:00
doxygen doxygen: Plumb through gallium/ to automated documentation 2016-05-30 17:53:45 +01:00
include Intel: Add a Kaby Lake PCI ID 2018-04-25 13:31:55 -07:00
m4 m4: Use older autoconf 2.63 compatible ax_check_compile_flag. 2017-09-01 16:30:40 -07:00
scons meson/configure: detect endian.h instead of trying to guess when it's available 2018-03-23 11:44:21 +00:00
scripts get_reviewer.pl: fix mesa check 2016-08-30 16:44:00 -04:00
src mesa: fix glGetInteger/Float/etc queries for vertex arrays attribs 2018-05-10 08:08:11 -06:00
.dir-locals.el dir-locals.el: Adds White Space support 2016-11-14 19:17:49 +02:00
.editorconfig editorconfig: Add meson configuration 2017-10-09 13:40:50 -07:00
.gitattributes Disable autocrlf for Visual Studio project files. 2008-02-28 12:34:01 +09:00
.gitignore .gitignore: list *.orig and *.rej 2017-09-06 17:48:50 +01:00
.mailmap mailmap: Use Eric Engestrom's personal email address 2018-03-15 12:03:41 +00:00
.travis.yml travis: update libva required version 2018-04-25 16:09:20 +02:00
Android.common.mk meson/configure: detect endian.h instead of trying to guess when it's available 2018-03-23 11:44:21 +00:00
Android.mk dri drivers: Always add the sha1 build-id 2017-10-31 23:36:54 -07:00
appveyor.yml appveyor: Build with MSVC 2015. 2018-02-22 21:10:20 +00:00
autogen.sh autogen.sh: pass --force to autoreconf, quote ORIGDIR 2015-03-11 23:28:26 +00:00
CleanSpec.mk android: Depend on gallium_dri from EGL, instead of linking in gallium. 2015-06-09 11:38:45 -07:00
common.py scons: Recognize LLVM_CONFIG environment variable. 2016-11-24 13:37:33 -08:00
configure.ac configure.ac: rework -latomic check 2018-05-10 08:13:57 -07:00
install-gallium-links.mk gallium: Fix install-gallium-links.mk on non-bash /bin/sh 2016-10-10 08:56:12 -07:00
install-lib-links.mk install-lib-links: remove the .install-lib-links file 2015-02-24 15:33:25 +00:00
Makefile.am autotools: include include/vulkan headers 2018-04-20 20:26:49 -07:00
meson.build configure.ac/meson.build: Fix -latomic test 2018-05-07 10:14:53 -07:00
meson_options.txt meson: use array type options 2018-04-24 14:08:15 -07:00
REVIEWERS REVIEWERS: add Alexander von Gluck IV as a reviewer for Haiku 2017-11-23 10:00:55 +00:00
SConstruct scons: use python3-compatible lists 2017-09-25 12:05:44 +01:00
VERSION Bump version after 18.1 2018-04-22 09:35:56 -07:00

docs/README.WIN32 

File: docs/README.WIN32

Last updated: 21 June 2013


Quick Start
----- -----

Windows drivers are build with SCons.  Makefiles or Visual Studio projects are
no longer shipped or supported.

Run

  scons libgl-gdi

to build gallium based GDI driver.

This will work both with MSVS or Mingw.


Windows Drivers
------- -------

At this time, only the gallium GDI driver is known to work.

Source code also exists in the tree for other drivers in
src/mesa/drivers/windows, but the status of this code is unknown.

Recipe
------

Building on windows requires several open-source packages. These are
steps that work as of this writing.

- install python 2.7
- install scons (latest)
- install mingw, flex, and bison
- install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs
  get pywin32-218.4.win-amd64-py2.7.exe
- install git
- download mesa from git
  see https://www.mesa3d.org/repository.html
- run scons

General
-------

After building, you can copy the above DLL files to a place in your
PATH such as $SystemRoot/SYSTEM32.  If you don't like putting things
in a system directory, place them in the same directory as the
executable(s).  Be careful about accidentially overwriting files of
the same name in the SYSTEM32 directory.

The DLL files are built so that the external entry points use the
stdcall calling convention.

Static LIB files are not built.  The LIB files that are built with are
the linker import files associated with the DLL files.

The si-glu sources are used to build the GLU libs.  This was done
mainly to get the better tessellator code.

If you have a Windows-related build problem or question, please post
to the mesa-dev or mesa-users list.