If the librtlsdr code comes from a tarball, it doesn't have any .git/
metadata, and therefore even if Git (as a tool) is found, the logic in
cmake/Modules/Version.cmake fails finding a version through Git:
-- Extracting version information from git describe...
fatal: Not a git repository (or any of the parent directories): .git
As a consequence, the VERSION variable is empty, which later causes
cmake to bail out with:
CMake Error at /home/test/autobuild/run/instance-1/output-1/host/share/cmake-3.15/Modules/WriteBasicConfigVersionFile.cmake:43 (message):
No VERSION specified for WRITE_BASIC_CONFIG_VERSION_FILE()
Call Stack (most recent call first):
/home/test/autobuild/run/instance-1/output-1/host/share/cmake-3.15/Modules/CMakePackageConfigHelpers.cmake:225 (write_basic_config_version_file)
CMakeLists.txt:173 (write_basic_package_version_file)
To avoid this, we only use Git to determine the version if the cmake
project top-level source directory has a .git/ folder.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit feb5d9c6b7bcec788f9b01781c205e31fff260e7)
libusb < 1.0.9 doesn't have libusb_handle_events_timeout_completed(),
but libusb <= 1.0.8 doesn't have version.h, so we need to check
for the function.
The cmake-code was borrowed from UHD, which also checks
for libusb_error_name(), we add that as well since it might come
handy later on.
Signed-off-by: Steve Markgraf <steve@steve-m.de>
Thomas Petazzoni
Steve Markgraf
Dimitri Stolnikov
Hoernchen