PC_FFTW3f_FOUND indicates that FFTW3f was found via pkg-config.
It can also be found without pkg-config, if the necessary paths
are supplied. This fixes hackrf_sweep not being built in that case.
The libtarget variable isn't defined here (it's used in a helper
function above). This caused libhackrf to be built and installed without
a version number.
Refactor HackRF build system with a more modern CMake style.
Install files to allow library users using CMake to
find_project(HackRF CONFIG) and obtain HackRF::hackrf
and/or HackRF::hackrf_static library targets.
Add options ENABLE_STATIC_LIB and ENABLE_SHARED_LIB
to allow shared or static library to be disabled.
(Default builds both shared and static libraries.)
Add option ENABLE_HACKRF_SWEEP, when disabled allows
building without FFT library. (Default enabled.)
Add option DISABLE_USB_DEVICE_DISCOVERY for a compile definition
which could be used to alter libusb usage as needed on Android.
Counter-intuitively, this actually saves us two cycles because we unroll
the first iteration of the loop that spins on the interrupt flag, saving
a branch in the case that the flag is clear the first time.
* Add artifact publish step for Windows libraries and host tools.
* Replace runner.workspace with github.workspace.
* Update checkout task to v4 to supress warning.
* Update CMAKE for libhackrf and hackrf-tools to also install DLLs on WIN32 platforms.
* Update uploadartifact task to v4 since v3 uses an end-of-life node version 16.
* Add a new windows variable for the vcpkg cmake toolchain makefile.
Compiling with clang-cl, gives this error:
```c
hackrf-tools/src/hackrf_sweep.c(685,3): error: call to undeclared function '_setmode'; ISO C99 and later do not support implicit function
declarations [-Wimplicit-function-declaration]
685 | _setmode(_fileno(stdout), _O_BINARY);
| ^
```
fixed by simply adding `#include <io.h>`.
