This is also being done for gtest for similar reasons.
Currently glslang will build everything from spirv-tools despite
this not being neccessary.
EXCLUDE_FROM_ALL dramatically improves the build performance.
Going from compiling roughly 446 files to 292
Furthermore only the targets we need to install are installed.
Which makes it easier to verify the glslang installation.
A project that uses googletest(GTEST) shouldn't include googletest
headers with its artifacts in its install target. These headers
simply are not needed by the consumers of the install target and
can cause conflicts with other projects that use googletest
themselves and this project's install target. And they are just not
part of the expected glslang build artifacts.
It is likely that the addition of the googletest headers to the install
target was a simple oversight that happens as a result of adding
googletest as a CMake subdirectory.
For more information on how this causes conflicts with other projects,
please see: https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/821.
This reverts commit cfc69d95af.
* Change CMAKE_INSTALL_PREFIX default on Windows in order
to prevent permission denied errors when trying to install
to "Program Files".
* Use `GNUInstallDirs` in order to respect GNU conventions.
This is especially important for multi-arch/multi-lib setups.
* Specify position independent mode building properly, without
using the historic hack of adding `-fPIC` as a definition.
This makes the build system more portable.
* Only detect C++ (and not C) to slightly speed up configuring.
* Specify C++11 mode using modern CMake idioms.
* Fix some whitespace issues.
This adds solution folders that properly group gtest/glslang/hlsl.
This also marks gtest options as advanced so they don't show up
in cmake-gui by default.
The existing test harness is a homemade shell script. All the tests
and the expected results are written in plain text files. The harness
just reads in a test, invoke the glslangValidator binary on it, and
compare the result with the golden file. All tests are kinda
integration tests.
This patch add Google Test as an external project, which provides a
new harness for reading shader source files, compile to SPIR-V, and
then compare with the expected output.
