QCC is a wrapper around GCC, but it is not a fully transparent wrapper.
Some compile options need to be passed to GCC using a `-Wc` option.
QCC does not support --sysroot, so setting CMAKE_SYSROOT in a toolchain
file currently does not work. This means that it is likely that no one
is setting CMAKE_SYSROOT in existing QNC toolchain files. Override the
GCC option for sysroot in the QCC.cmake file with -Wc,-isysroot.
This exposes a further issue in that the QNX SDK does not follow the
same architectural folder structure as linux uses. That is, on linux
systems, architecture-specific libraries might be in
<sysroot>/usr/lib/<arch>
such as
/usr/lib/x86_64-linux-gnu/libcurl.so
CMake models this by suffixing the <arch> onto lib directories when
searching for libraries.
The QNX SDK is structured differently such that the <arch> should be
used as a prefix:
<sysroot>/<arch>/usr/lib
such as
<sysroot>/x86_64/usr/lib/libcurl.so
Add a variable for platform configuration to set whether to prefix or
suffix the <arch> and set that in the QCC.cmake.
Use the directory structure of the QNX SDK to compute the <arch> from
the implicit library directories. The assumption is that the arch will
be a single directory directly below the CMAKE_SYSROOT, below which the
usr/ prefix occurs.
It would not be appropriate to instruct users to make the <arch> part of
the sysroot when specified in the toolchain file because:
1. That would be non-DRY - The QCC wrapper already determines the <arch>
by the -V argument passed to the compiler, specified in the toolchain
file as the CMAKE_C_COMPILER_TARGET variable.
2. The includes in the QNX SDK are not below the <arch> directory.
So, the location of the <arch> in the full path is different on QNX
compared to, say an embedded linux platform, but the intent is the same.
Add documentation to recommend the use of CMAKE_SYSROOT in a QNX
toolchain file.
As the CMAKE_SYSROOT is always the same for QNX, it would be possible to
simply set it in QCC.cmake. However, that would change behavior for
existing users as when CMAKE_SYSROOT is set, files/paths outside of the
CMAKE_SYSROOT do not get found.
The <arch> prefixing is only enabled in cmSearchPath.cxx if
CMAKE_SYSROOT is set. This ensures that the user gets consistency in
the current state without CMAKE_SYSROOT, and gets better consistency
when using CMAKE_SYSROOT.
The NDK build system now uses only a single toolchain in
<ndk>/toolchains/llvm/prebuilt/<host>
Its compilers are always `bin/{clang,clang++}` and its binutils are
always `bin/<triple>-*`. It is a standalone toolchain:
* The Anrdoid API level is specified at the end of `--target=`.
* The standard library may be specified via `-stdlib=`.
* No need to pass system includes or libraries explicitly.
* No need to pass `--sysroot` or `-gcc-toolchain`.
Teach CMake to recognize NDK versions that have a unified
toolchain with its own sysroot and use the above approach.
Fixes: #18739
- Remove code signing requirements for non-macOS
- Do not set deployment target for non-macOS
- Build static library for compiler feature detection for non-macOS
- Use framework to run CompilerId tests for watchOS
- Port tests to new SDK handling
- Add new Apple cross-compiling section to toolchain documentation
Closes: #17870
The unified headers are preferred as of NDK r15, so use them by default
if available and provide an option to use the deprecated headers.
Inspired-by: Florent Castelli <florent.castelli@gmail.com>
Fixes: #16584
When this variable is not set by the user or toolchain file, set it to
the default selected. This will be useful for client code that needs to
pass the value to an external tool that needs to find the same toolchain
in the NDK. Leave it empty for a standalone toolchain.
Suggested-by: Ruslan Baratov <ruslan_baratov@yahoo.com>
CMake now supports cross compiling for Android using the NDK or a
standalone toolchain. Document the associated variables and how how to
write toolchain files for Android.
We originally deprecated this module in commit v3.5.0-rc1~295^2
(CMakeForceCompiler: Deprecate this module and its macros, 2015-10-19).
Then a use case was found to still require the module so the deprecation
was reverted for CMake 3.5 by commit v3.5.0-rc3~4^2 (CMakeForceCompiler:
De-deprecate until more use cases have alternatives, 2016-02-17). Since
then `CMAKE_TRY_COMPILE_TARGET_TYPE` was introduced to provide an
alternative solution for that use case. Deprecate the module again.
Extend the Nsight Tegra project generator to add bunch of properties
with the backing variables to fine-tune the generated projects.
Add target properties that map to all "Configuration" PropertyGroups for
each configuration:
* ANDROID_ARCH
* ANDROID_STL_TYPE
Add target properties that map to the AntBuild section of vcxproj files:
* ANDROID_ANT_ADDITIONAL_OPTIONS
* ANDROID_ASSETS_DIRECTORIES
* ANDROID_JAR_DEPENDENCIES
* ANDROID_JAR_DIRECTORIES
* ANDROID_JAVA_SOURCE_DIR
* ANDROID_NATIVE_LIB_DEPENDENCIES
* ANDROID_NATIVE_LIB_DIRECTORIES
* ANDROID_PROCESS_MAX
* ANDROID_PROGUARD
* ANDROID_PROGUARD_CONFIG_PATH
* ANDROID_SECURE_PROPS_PATH
* ANDROID_SKIP_ANT_STEP
Reviewed-by: Dmitry Polyanitsa <dpolyanitsa@nvidia.com>
Also add a 'CMAKE_ANDROID_API_MIN' variable to set the property
default. Teach the VS generator to write the MIN API value into
Nsight Tegra project files.
Update the wording of some examples to avoid long lines in code blocks.
Otherwise the formatted documentation can exceed certain column width
limitations.
