Recent refactor external dependencies handling (D6642)
improperly linked all library dependencies with public
linkage rather than interface linkage. Causing excessive
(re)builds of subprojects when not needed.
This patch restores the interface linkage.
Reviewed By: brecht sergey
Differential Revision: https://developer.blender.org/D6983
System GLEW often is not new enough, which gives error on startup. The build
correctness should not be affected by using lite vs. full, so better to leave
this out than save compiling one extra file.
On Linux, precompiled libraries may be made with a glibc version that is
incompatible with the system libraries that Blender is built on. To solve
this we add a few -ffast-math symbols that can be missing.
Differential Revision: https://developer.blender.org/D6930
Based on work by Nathan Craddock, with further changes to apply it to all
precompiled libraries.
Differential Revision: https://developer.blender.org/D6929
Lots of fixes and cleanups, mainly addressing:
* OpenEXR building was fully broken.
* Missing dependencies of Alembic to Boost and openEXR.
* OSL had changed its CMake parameters for custom OpenEXR install path.
* Dependencies between libs were not properly handles when switching a
lib from own build to system package.
The OpenCOLLADA package contains a mix of files with unix and dos line endings.
Now we mark the diff as a binary file so that the patch also contains a mix of
line endings that matches the package.
Seems like sometimes files are being only partially ready, which makes it so there
are unsigned files, failing to deliver fully signed bundle.
Now expected archive file size is stored into stamp file and is checked against
size of the archive file on another side.
There are some bare prints used for debugging, would need to switch it to a proper
logger (or to be removed).
This extends FindOpenShadingLanguage.cmake to also look for the location of
stdosl.h and adds the path to the invocation of oslc to deal with the headers
being in different locations a little better.
Differential Revision: https://developer.blender.org/D6865
Reviewers: brecht
MSVC has a conformance mode (/permissive-) where the C++ standard is more strictly
enforced. This mode is available on MSVC 15.5+ [1]
This patch enables this mode on compilers that support it and cleans up the few violations it threw up in the process.
- Mantaflow was using M_PI without requesting them using the _USE_MATH_DEFINES define to opt in to non default behaviour.
- Collada did not include the right header for std::cerr, this seemingly was fixed for other platforms already but put inside a platform guard.
- Ghost had some scoping issues regarding uninitialized variables and goto behaviour
Second landing of this patch, earlier commit was reverted due to some compiler configurations having slipped though testing
[1] https://docs.microsoft.com/en-us/cpp/build/reference/permissive-standards-conformance
Differential Revision: https://developer.blender.org/D6824
Reviewed By: brecht
It is breaking compilation on some configurations, revert for now while
i see what is wrong.
This reverts commit 9fe469c110940af5d2525158305d5d365bd15276.
MSVC has a conformance mode (/permissive-) where the C++ standard is more strictly
enforced. This mode is available on MSVC 15.5+ [1]
This patch enables this mode on compilers that support it and cleans up the few violations it threw up in the process.
- Mantaflow was using M_PI without requesting them using the _USE_MATH_DEFINES define to opt in to non default behaviour.
- Collada did not include the right header for std::cerr, this seemingly was fixed for other platforms already but put inside a platform guard.
- Ghost had some scoping issues regarding uninitialized variables and goto behaviour
[1] https://docs.microsoft.com/en-us/cpp/build/reference/permissive-standards-conformance
Differential Revision: https://developer.blender.org/D6824
Reviewed By: brecht
This commit adds the download, extract, patch, build, and install of the
Universal Scene Description (USD) library to the `install_deps.sh`
script.
Reviewed By: mont29, LazyDodo
Differential Revision: https://developer.blender.org/D6478
Previously the MSVC environment was setup every time using vcvarsall.bat
when you ran you ran rebuild.cmd, Generally not an issue but after many
rebuilds on the same console, it grows the path environment variable
beyond what is supported and building breaks.
This patch adds a check to see if the environment is setup already
and skips the call to vcvarsall.bat
Also cleans up the double build in the msbuild's version of rebuild.cmd
install.vcxproj will build all that is needed, so no need to do a regular
build first.
oidn puts dllexport on all its functions causing the
blender binary to export these symbols.
this patch fixes this unwanted behaviour.
Differential Revision: https://developer.blender.org/D6647
Reviewers: brecht , sergey
libxml puts dllexport on all its functions causing the
blender binary to export these symbols.
this patch fixes this unwanted behaviour.
Differential Revision: https://developer.blender.org/D6646
Reviewers: brecht , sergey
Freeetype 2.9.1 tags dllexport on most of its functions so these
are now exported from the blender binary. (Same issue as D6563
which fixed it for USD)
Issue has already been fixed upstream so a simple version bump
fixes it.
This patch bumps freetype to 2.10.1
Differential Revision: https://developer.blender.org/D6645
Reviewers: brecht , sergey
OSL 1.10.9 fixes osl-bug 866 [1] which is long standing issue
on windows where paths get un-escaped and osl breaks when you
install it to for instance c:\blender-tests\new-boolean
This patch bumps osl to 1.10.9, and since osl is llvm's
only consumer, llvm/clang were bumped 9.0.1
Removed some of the patches that were no longer needed
Builds and passes all tests on windows and linux
[1] https://github.com/imageworks/OpenShadingLanguage/issues/866
Differential Revision: https://developer.blender.org/D6744
Reviewers: brecht
Adding USD to a lite build fails to build due to boost errors, when you turn
boost on and rebuild still boost errors, boost was silently turned off since
it was not deemed needed. Once boost was forced on, it still fails due to TBB
being off.
This patch fixes:
- The Silent disabling of boost
- Add a check that USD is is not on before doing that
- move the TBB checks to a central location rather than the individual platform files
- Add USD to the TBB checks.
Differential Revision: https://developer.blender.org/D6479
Reviewers: brecht, sybren
Not sure when this happened but apparently the lower bar is now windows 7 [1]
This patch bumps to API version to 0x0601 (Win7) and cleans up any uses that
worked around the globally set API version.
[1] https://www.blender.org/download/requirements/
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D6758
Reduce the number of possible locations used to find libraries,
to simplify troubleshooting.
Only keep '*_ROOT_DIR' and the path used by 'install_deps.sh'.
An educated guess to put ensure order of static libraries initialization.
A bit weird, since OpenImageDenoise should be depending on TBB, but that
is likely being ensured by bf_compositor.
Linking succeeded on my Intel machine, and blenloader_test was passing
when doing manual test on buildbot.
From looking into builder's logs it seems that stamp file is picked
up prior to actual archive: sometimes worker reports missing archive
file, from a code path which is only possible if there is a stamp file.
Could be something with IO scheduling where bigger file is sent to
Samba server after smaller file.
Hopefully with this change this will not happen anymore.
It changes name to be blender-<version>-linux64.
Since CentOS is used as a base host for builds there is no real need
in specifying libc version. Is unlikely anything older could be used
anyway.
Also make bitness to be the same as windows. It is something what
users will read easier.
When building with precompiled libraries on Linux, CMake used boost libs
from the system outside the lib dir. This restricts CMake to use only the
libraries from the precompiled libraries.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D6659
Boost could have picked up system-wide libbz2-dev installed and enable
this compression in iostreams. Nothing really wrong with this, but it
makes it so final Blender binary depends on bz2, which breaks default
linker flags.
This commit makes it so Boost is not using libraries which we don't
need, simplifying linking setup.
Differential Revision: https://developer.blender.org/D6668
This is a more correct fix to the issue Brecht was fixing in D6600.
While the fix in that patch worked fine for linking it broke ASAN
runtime under some circumstances.
For example, `make full debug developer` would compile, but trying
to start blender will cause assert failure in ASAN (related on check
that ASAN is not running already).
Top-level idea: leave it to CMake to keep track of dependency graph.
The root of the issue comes to the fact that target like "blender" is
configured to use a lot of static libraries coming from Blender sources
and to use external static libraries. There is nothing which ensures
order between blender's and external libraries. Only order of blender
libraries is guaranteed.
It was possible that due to a cycle or other circumstances some of
blender libraries would have been passed to linker after libraries
it uses, causing linker errors.
For example, this order will likely fail:
libbf_blenfont.a libfreetype6.a libbf_blenfont.a
This change makes it so blender libraries are explicitly provided
their dependencies to an external libraries, which allows CMake to
ensure they are always linked against them.
General rule here: if bf_foo depends on an external library it is
to be provided to LIBS for bf_foo.
For example, if bf_blenkernel depends on opensubdiv then LIBS in
blenkernel's CMakeLists.txt is to include OPENSUBDIB_LIBRARIES.
The change is made based on searching for used include folders
such as OPENSUBDIV_INCLUDE_DIRS and adding corresponding libraries
to LIBS ion that CMakeLists.txt. Transitive dependencies are not
simplified by this approach, but I am not aware of any downside of
this: CMake should be smart enough to simplify them on its side.
And even if not, this shouldn't affect linking time.
Benefit of not relying on transitive dependencies is that build
system is more robust towards future changes. For example, if
bf_intern_opensubiv is no longer depends on OPENSUBDIV_LIBRARIES
and all such code is moved to bf_blenkernel this will not break
linking.
The not-so-trivial part is change to blender_add_lib (and its
version in Cycles). The complexity is caused by libraries being
provided as a single list argument which doesn't allow to use
different release and debug libraries on Windows. The idea is:
- Have every library prefixed as "optimized" or "debug" if
separation is needed (non-prefixed libraries will be considered
"generic").
- Loop through libraries passed to function and do simple parsing
which will look for "optimized" and "debug" words and specify
following library to corresponding category.
This isn't something particularly great. Alternative would be to
use target_link_libraries() directly, which sounds like more code
but which is more explicit and allows to have more flexibility
and control comparing to wrapper approach.
Tested the following configurations on Linux, macOS and Windows:
- make full debug developer
- make full release developer
- make lite debug developer
- make lite release developer
NOTE: Linux libraries needs to be compiled with D6641 applied,
otherwise, depending on configuration, it's possible to run into
duplicated zlib symbols error.
Differential Revision: https://developer.blender.org/D6642
We compile zlib as own dependency, but are not informing BLOSC
to use it. This leads to zlib symbols defined twice when linking
Blender: one set comes from libz.a and another one from libblosc.a.
Tested on Linux Debian testing and CentOS 7.5.
It is possible that this change on its own will lead to linking
errors after libraries are re-compiled, This will be fixed as
a dedicated fix to Blender's build system.
Reviewed By: brecht, mont29, LazyDodo
Differential Revision: https://developer.blender.org/D6641
Over-lines are used in other large files (keymaps for e.g),
using this add-hoc convention for sections make it easier to
configure editors to jump between them (as I have locally).
Even though we build USD as static, it still feels the need to mark its
symbols with declspec(dllexport) which means the blender binary now exports
these symbols.
this patch fixes that unwanted behaviour, however USD libs still need to
rebuild before this becomes visible in the blender binary
Differential Revision: https://developer.blender.org/D6563
Reviewed By: sybren
The USD landing broke building with clang on windows
due to a couple of reasons:
1) Some incompatibilities in their headers [1] only one
of them was important for us and is included in our patchset
now.
2) clangs lld wanted the full path to the libusd_b library
when using the whole archive link option, while msvc can
figure it out from just the library name.
Tested with clang/msvc and msbuild and ninja generators
[1] https://github.com/PixarAnimationStudios/USD/issues/1030
This aligns with the VFX reference platform 2020 along with the decision
to stick to Python 3.7, see T68774.
Blosc was downgraded to 1.5 as recommended by the OpenVDB documentation.
IlmBase and OpenEXR are now built together with CMake rather separately
using autoconf.
Differential Revision: https://developer.blender.org/D6593
Even though we build USD as static, it still feels the need to mark its
symbols with declspec(dllexport) which means the blender binary now exports
these symbols.
this patch fixes that unwanted behaviour, however USD libs still need to
rebuild before this becomes visible in the blender binary
Differential Revision: https://developer.blender.org/D6563
Reviewed By: sybren
The USD landing broke building with clang on windows
due to a couple of reasons:
1) Some incompatibilities in their headers [1] only one
of them was important for us and is included in our patchset
now.
2) clangs lld wanted the full path to the libusd_b library
when using the whole archive link option, while msvc can
figure it out from just the library name.
Tested with clang/msvc and msbuild and ninja generators
[1] https://github.com/PixarAnimationStudios/USD/issues/1030
For no apparent reason, when building Alembic the script would always
re-download and re-extract the Alembic source code. This is no longer the
case, and it now only happens if the source directory is missing. Since the
source directory name contains the Alembic version, it will automatically
trigger a download+extract when the version changes.
Previously, when an unknown parameter was passed to `install_deps.sh`,
the script would just show "Wrong parameter!" without any context. This
can make it hard to figure out what's exactly going wrong. Now it prints
which parameter it thinks is wrong.
Smaller changes in the build files to reflect the new Mantaflow macro.
Reviewed By: sergey
Maniphest Tasks: T59995
Differential Revision: https://developer.blender.org/D3853
This commit introduces the first version of an exporter to Pixar's
Universal Scene Description (USD) format.
Reviewed By: sergey, LazyDodo
Differential Revision: https://developer.blender.org/D6287
- The USD libraries are built by `make deps`, but not yet built by
install_deps.sh.
- Only experimental support for instancing; by default all duplicated
objects are made real in the USD file. This is fine for exporting a
linked-in posed character, not so much for thousands of pebbles etc.
- The way materials and UV coordinates and Normals are exported is going
to change soon.
- This patch contains LazyDodo's fixes for building on Windows in D5359.
== Meshes ==
USD seems to support neither per-material nor per-face-group
double-sidedness, so we just use the flag from the first non-empty
material slot. If there is no material we default to double-sidedness.
Each UV map is stored on the mesh in a separate primvar. Materials can
refer to these UV maps, but this is not yet exported by Blender. The
primvar name is the same as the UV Map name. This is to allow the
standard name "st" for texture coordinates by naming the UV Map as such,
without having to guess which UV Map is the "standard" one.
Face-varying mesh normals are written to USD. When the mesh has custom
loop normals those are written. Otherwise the poly flag `ME_SMOOTH` is
inspected to determine the normals.
The UV maps and mesh normals take up a significant amount of space, so
exporting them is optional. They're still enabled by default, though.
For comparison: a shot of Spring (03_035_A) is 1.2 GiB when exported
with UVs and normals, and 262 MiB without. We probably have room for
optimisation of written UVs and normals.
The mesh subdivision scheme isn't using the default value 'Catmull
Clark', but uses 'None', indicating we're exporting a polygonal mesh.
This is necessary for USD to understand our normals; otherwise the mesh
is always rendered smooth. In the future we may want to expose this
choice of subdivision scheme to the user, or auto-detect it when we
actually support exporting pre-subdivision meshes.
A possible optimisation could be to inspect whether all polygons are
smooth or flat, and mark the USD mesh as such. This can be added when
needed.
== Animation ==
Mesh and transform animation are now written when passing
`animation=True` to the export operator. There is no inspection of
whether an object is actually animated or not; USD can handle
deduplication of static values for us.
The administration of which timecode to use for the export is left to
the file-format-specific concrete subclasses of
`AbstractHierarchyIterator`; the abstract iterator itself doesn't know
anything about the passage of time. This will allow subclasses for the
frame-based USD format and time-based Alembic format.
== Support for simple preview materials ==
Very simple versions of the materials are now exported, using only the
viewport diffuse RGB, metallic, and roughness.
When there are multiple materials, the mesh faces are stored as geometry
subset and each material is assigned to the appropriate subset. If there
is only one material this is skipped.
The first material if any) is always applied to the mesh itself
(regardless of the existence of geometry subsets), because the Hydra
viewport doesn't support materials on subsets. See
https://github.com/PixarAnimationStudios/USD/issues/542 for more info.
Note that the geometry subsets are not yet time-sampled, so it may break
when an animated mesh changes topology.
Materials are exported as a flat list under a top-level '/_materials'
namespace. This inhibits instancing of the objects using those
materials, so this is subject to change.
== Hair ==
Only the parent strands are exported, and only with a constant colour.
No UV coordinates, no information about the normals.
== Camera ==
Only perspective cameras are supported for now.
== Particles ==
Particles are only written when they are alive, which means that they
are always visible (there is currently no code that deals with marking
them as invisible outside their lifespan).
Particle-system-instanced objects are exported by suffixing the object
name with the particle's persistent ID, giving each particle XForm a
unique name.
== Instancing/referencing ==
This exporter has experimental support for instancing/referencing.
Dupli-object meshes are now written to USD as references to the original
mesh. This is still very limited in correctness, as there are issues
referencing to materials from a referenced mesh.
I am still committing this, as it gives us a place to start when
continuing the quest for proper instancing in USD.
== Lights ==
USD does not directly support spot lights, so those aren't exported yet.
It's possible to add this in the future via the UsdLuxShapingAPI. The
units used for the light intensity are also still a bit of a mystery.
== Fluid vertex velocities ==
Currently only fluid simulations (not meshes in general) have explicit
vertex velocities. This is the most important case for exporting
velocities, though, as the baked mesh changes topology all the time, and
thus computing the velocities at import time in a post-processing step
is hard.
== The Building Process ==
- USD is built as monolithic library, instead of 25 smaller libraries.
We were linking all of them as 'whole archive' anyway, so this doesn't
affect the final file size. It does, however, make life easier with
respect to linking order, and handling upstream changes.
- The JSON files required by USD are installed into datafiles/usd; they
are required on every platform. Set the `PXR_PATH_DEBUG` to any value
to have the USD library print the paths it uses to find those files.
- USD is patched so that it finds the aforementioned JSON files in a path
that we pass to it from Blender.
- USD is patched to have a `PXR_BUILD_USD_TOOLS` CMake option to disable
building the tools in its `bin` directory. This is sent as a pull
request at https://github.com/PixarAnimationStudios/USD/pull/1048
Tests were missing a manifest, and were importing the
wrong version of Microsoft.Windows.Common-Controls
causing blenloader_test, bmesh_core_test and alembic_test
to fail due a loader error.
In older versions the ms crt was only a few dlls, in recent versions
this jumped to over 40 leading to quite a bit of clutter in our
bin folder.
This change moves the CRT into its own folder.
For developers that generally already have the runtime globaly
available on their machine, there is a new cmake option
(WITH_WINDOWS_BUNDLE_CRT, default ON) that you can use to toggle
installing the runtime to the blender bin folder, and save some
time during the initial build, this option is off by default for
only the developer profile.
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D6132
On CentOS 7, `tar --use-compress-program='xz -9'` tries to run `xz -9` as
executable, rather than running `xz` with `-9` as argument. Passing the
`-9` option via the `XZ_OPT` environment variable, as suggested by
@campbellbarton in D6138, works fine.
Previously some important features like OpenSubdiv were disabled by default,
which caused confusion.
The purpose of disabling some of these features was to avoid potentiall build
errors on Linux. But with precompiled libraries, install_deps.sh and better
library availability checking this is hopefully not much of a problem anymore.
This makes "make full" obsolete, but it's kept to not break docs or shell
scripts that people may have, and the .cmake config file remains useful to
modify an existing build folder.
This also changes some option to only be available on platforms where they
are actually supported (WITH_JACK, WITH_TBB_MALLOC_PROXY and X11 options).
Fixes T69742
Differential Revision: https://developer.blender.org/D6306
This new test class minimally sets up Blender so that it can load blend
files and construct a depsgraph without crashing.
Note that it hasn't been tested on very complex blend files, so it may
still crash when the loaded blend file references/requires uninitialised
data structures.
The test will certainly crash with Blend files created with Blender
older than 2.80, as the versioning code requires space types to be
registered. This is normally done by initialising the window manager,
which is not done in this test. The WM requires Python to run, which in
turn requires that Blender finds the release directory in the same
directory that contains the running executable, which is not the case
for GTest tests (they are written to `bin/tests/executablename`.
Reviewed By: sergey, mont29
Differential Revision: https://developer.blender.org/D6246
xz compresses 25% better than bz2, reducing download times and server load.
The numbers:
blender-2.80-linux-glibc217-x86_64.tar.bz2 (release): 134 886 174 bytes
with xz: 96 181 604 bytes (-28.7%)
with xz -9: 93 871 548 bytes (-30.4%)
blender-2.81-7c1fbe24ca33-linux-glibc217-x86_64.tar.bz2 (beta): 173 600 363 bytes
with xz: 133 100 664 bytes (-23.3%)
with xz -9: 129 534 124 bytes (-25.4%)
xz also decompresses more than twice as fast as bz2, however compression needs
four times as long (on my 7-year-old laptop 3-4 minutes instead of <1).
Also xz has become more common than bz2, e.g. Debian/Ubuntu deb packages have
been xz-compressed for years, so the dpkg package manager as well as systemd
and grub all depend on liblzma being present, whereas bz2 is becoming more and
more optional.
Current Linux archives also include the UID/GID of whatever user account
happens to be used for building by the blender.org infrastructure. If someone
then installs these archives as root e.g. to /usr/local/... and doesn't pay
full attention the files remain owned by a regular user, which is a serious
security issue. This patch fixes that by setting the UID/GID to 0.
Differential Revision: https://developer.blender.org/D6138
This was added years ago to prepare for code-signing the executable
but was never used, buildbots use a different mechanism now to sign
so no need to keep this around.
Alembic 1.7.12 introduces a 'DCC FPS' hint, allowing Blender to write
the scene frame rate to the Alembic file. This will make it possible for
importers and converters to properly deal with situations where 'frame
number' is the only reference to time.
Writing this new DCC FPS hint will be done in a separate commit. Here
only the Alembic library is upgraded from 1.7.8 to 1.7.12.
Was caused by "wrong" EOL characters used in the patch: the file is
actuallyu saved using CRLF EOL style.
The patch was using CRLF as well for until recent change in the C
runtime.
The script requires Python 3.7 as a very minimum, and CentOS is
only 3.6.
On macOC there was an access to a None object, due to missing
implementation of code signer on this platform.
This changes integrates code signing steps into a buildbot worker
process.
The configuration requires having a separate machine running with
a shared folder access between the signing machine and worker machine.
Actual signing is happening as a "POST-INSTALL" script run by CMake,
which allows to sign any binary which ends up in the final bundle.
Additionally, such way allows to avoid signing binaries in the build
folder (if we were signing as a built process, which iwas another
alternative).
Such complexity is needed on platforms which are using CPack to
generate final bundle: CPack runs INSTALL target into its own location,
so it is useless to run signing on a folder which is considered INSTALL
by the buildbot worker.
There is a signing script which can be used as a standalone tool,
making it possible to hook up signing for macOS's bundler.
There is a dummy Linux signer implementation, which can be activated
by returning True from mock_codesign in linux_code_signer.py.
Main purpose of this signer is to give an ability to develop the
scripts on Linux environment, without going to Windows VM.
The code is based on D6036 from Nathan Letwory.
Differential Revision: https://developer.blender.org/D6216
The heap on windows is single threaded causing it to lag behind linux in performance in allocation heavy multithreaded scenarios, BVH building is a prime example.
See https://developer.blender.org/D6218 for benchmark results
for testing with the allocator enabled/disabled you can set the environment variable TBB_MALLOC_DISABLE_REPLACEMENT=1 to disable the TBB allocator.
Reviewed By: @sergey
Differential Revision: https://developer.blender.org/D6218
Makes it so compilation doesn't fail when the SVN updating
stumbles upon checkout which doesn't have correspondence in
a tag, but which isn't so risky as previous change.
This reverts commit 8e9e58895b32afc38f856053335c9b27324c6f9e.
The change broke behavior when typing `make update` from the root of
the sources: tests folder wouldn't be updated anymore.
Getting quite close to release now, so will revert to a safer change.
The issue was rooting to the fact that the script was iterating into
every directory inside of blender.git/../lib/ and attempted to switch
them to the desired path. This doesn't work in an environment where
both master and release branch are built (or any environment where
non-needed SVN directories are not automatically removed).
This change makes it so script explicitly generates a list of
directories which are required for the build. For example, the script
now stores an exact folder with ABI such as win64_vc14.
Only those explicitly listed directories will be updated.
This allows to:
- Solve compilation failure of 2.81 branch after checkout for
win64_vc15 libraries has been created.
- Fail compilation if actually expected tag is missing (for example,
when trying to build release branch prior to libraries tag).
Now, there was a confusing logic about possible .svn folder in
lib_dirpath (effectively, blender.git/../lib/.svn) which is not
something what is supposed to happen with the setup of buildbot we are
using for quite some time now. This logic has been removed now.
This change includes old-style string format(), mainly because it is
not know that the buidlbot scripts are run using python3 on CentOS
builder.
Differential Revision: https://developer.blender.org/D6230
This wasn't an issue in the real buildbot environment since the
precompiled libraries are compiled with same ABI as the compiler
used for Blender build. But it was causing issues when building
Blender using buildbot scripts (for troubleshooting purposes)
on a machine with different default compiler ABI.
Usually ABI detection is happening in platform_unix.cmake when
detecting whether there are any precompiled libraries folder
available. This detection is not happening when library folder
is provided explicitly, expecting ABI to be setup explicitly
as well.
