The FindPythonInterp and FindPythonLibs modules, which have
been deprecated since CMake 3.12, have been removed by policy
CMP0148. Port projects to FindPython3, FindPython2, or FindPython.
While trying to set a default for CMAKE_INSTALL_PREFIX sounds
appealing it has multiple issues.
It's particularly problematic for open source projects where
many users try to accomplish many different things.
It's also conflicting with the new way of installing with cmake
IE: `cmake --install build --prefix build/install`
I've already removed similar logic in various other Khronos
repositories a while ago to address similar complaints.
closes#1015
This is no longer needed with modern CMake.
I've already removed this from several Khronos repos.
See this stackoverflow for modern approaches to setting ccache via cmake:
https://stackoverflow.com/a/74120112/19739129
OpenBSD does not link shared libs against libc so it is expected
that the use of --no-undefined when linking will fail.
Also garbage collect CMAKE_VERSION check while here, as requested, since
the minimum version is already 3.14.
At least on openSUSE, the usual installation location for cmake support
files is ${MAKE_INSTALL_LIBDIR}/cmake/<name>
$ find /usr/lib64 -name '*.cmake' | grep /cmake/ | wc -l
834
$ find /usr/lib64 -name '*.cmake' | grep -v /cmake/ | wc -l
8
which is also used by glslang with these changes.
pre compiled headers leads to "internal error in mingw32_gt_pch_use_address, at config/i386/host-mingw32.c:192: MapViewOfFileEx: Attempt to access invalid address"
[BEFORE]:
% cmake ..
CMake Warning (dev) at CMakeLists.txt:35 (project):
Policy CMP0048 is not set: project() command manages VERSION variables.
Run "cmake --help-policy CMP0048" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.
The following variable(s) would be set to empty:
CMAKE_PROJECT_VERSION
CMAKE_PROJECT_VERSION_MAJOR
CMAKE_PROJECT_VERSION_MINOR
CMAKE_PROJECT_VERSION_PATCH
This warning is for project developers. Use -Wno-dev to suppress it.
-- No build type selected, default to Debug
-- Found PythonInterp: /usr/local/bin/python3 (found version "3.9")
-- Found PythonInterp: /usr/local/bin/python3 (found suitable version "3.9", minimum required is "3")
-- optimizer enabled
-- Google Mock found - building tests
-- Configuring done
[AFTER]:
% cmake ..
-- No build type selected, default to Debug
-- Google Mock was not found - tests based on that will not build
-- Configuring done
-- Generating done
iOS 8 does not support `thread_local`, which is still in use.
Another approach will have to be found.
This change is a revert of the following changes:
a3845240 - "Simplify PoolAlloc with use of thread_local."
abf92c80 - "Deprecate InitializeDll functions"
33585c87 - "Limit visibility of symbols for internal libraries"
Issue: #2346
Also remove `SPIRV/doc.cpp` from the `SPVRemapper` target as this
is part of `SPIRV`, causing ODR violations. Instead have
`SPVRemapper` link against `SPIRV`.
Fixes ODR violations.
Also remove `NOTICE` from message() about PCHs - it seems to print this in the actual message, contrary to the documentation where it is used as a severity.
`${CMAKE_SOURCE_DIR}` points to the outer project root, not the current directory.
Fixes building of `glslang` when included into another CMake project.
This PR significantly reworks the way glslang is versioned.
Instead of committing changes to the `GLSLANG_MINOR_VERSION` define in
`glslang/Public/ShaderLang.h`, and using `make-revision` to generate
`GLSLANG_PATCH_LEVEL` in `glslang/Include/revision.h`, all version
information is now derived from the new `CHANGES.md` file.
`CHANGES.md` acts as the single source of truth for glslang version
information, along with a convenient place to put all release notes for
each notable change made.
`CHANGES.md` is parsed using the new `build_info.py` python script.
This script can read basic template files to produce new source files,
which it does to read the new `build_info.h.tmpl` to generate (at build
time) a glslang private header at
`<build-dir>/include/glslang/build_info.h`.
I've written generators for each of the CMake, Bazel, gn, and
`Android.mk` build scripts.
The new version code conforms to the Semantic Versioning 2.0 spec.
This new version is also used by the CMake rules to produce versioned
shared objects, including a major-versioned SONAME.
New APIs:
---------
* `glslang::GetVersion()` returns a `Version` struct with the version
major, minor, patch and flavor.
Breaking API changes:
---------------------
* The public defines `GLSLANG_MINOR_VERSION` and `GLSLANG_PATCH_LEVEL`
have been entirely removed.
* `glslang/Public/ShaderLang.h` and `glslang/Include/revision.h` have
been deleted.
* Instead, `<build-dir>/include/glslang/build_info.h` is created in
the build directory, and `<build-dir>/include` is a CMake `PUBLIC`
(dependee-inherited) include directory for the glslang targets.
* `<build-dir>/include/glslang/build_info.h` contains the following
new #defines:
`GLSLANG_VERSION_MAJOR`, `GLSLANG_VERSION_MINOR`,
`GLSLANG_VERSION_PATCH`, `GLSLANG_VERSION_FLAVOR`,
`GLSLANG_VERSION_GREATER_THAN(major, minor, patch)`,
`GLSLANG_VERSION_GREATER_OR_EQUAL_TO(major, minor, patch)`,
`GLSLANG_VERSION_LESS_THAN(major, minor, patch)`,
`GLSLANG_VERSION_LESS_OR_EQUAL_TO(major, minor, patch)`
* The CMake install output directory contains a copy of
`build_info.h` at: `include/glslang/build_info.h`
* Python3 is now always required to build glslang (likely always
required for transitive dependency builds).
`glslang_pch()` did manual mangling of the compiler flags to enable pre-compiled headers.
I couldn't get this approach to work with the `MachineIndependent` subdirectory, but fortunately CMake has added first-class support for precompiled headers in 3.16, which does work with subdirectories.
Moved `glslang_pch()` to the other global function declarations.
`glslang_pch()` is a no-op when using CMake earlier than `3.16`.
CMake's PCH implementation does not need the `pch.cpp` files, so just remove them.
On closer inspection, it appears that nearly all the targets use the `POSITION_INDEPENDENT_CODE` target option anyway.
Simplify all this away by always being PIC.
Enables `-fPIC` compiler flag even when building statically.
This is helpful for statically linking a `glslang` target into a shared library.
Simplifies the workarounds seen in google/shaderc#1093 to a `set(GLSLANG_BUILD_PIC 1)`.
