CRAN build on macOS fails

[kpagacz]

1.70.0 version does not support the required version of env_logger. Check if we can get rid of the anstream feature.

Or better yet, maybe we can get rid of the env_logger dependency somehow.

* installing *source* package ‘tergo’ ...
** package ‘tergo’ successfully unpacked and MD5 sums checked
** using staged installation
*** Checking if cargo is installed
*** Cargo, rustup and rustc are installed
Found vendored dependencies
using Rust package manager: 'cargo 1.70.0 (ec8a8a0ca 2023-04-25)'
using Rust compiler: 'rustc 1.70.0 (90c541806 2023-05-31)'
** libs
using C compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using SDK: ‘MacOSX11.3.sdk’
 rm -Rf tergo.so entrypoint.o ./rust/.cargo ./rust/target//release/libtergo.a
clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/opt/R/x86_64/include    -fPIC  -falign-functions=64 -Wall -g -O2  -c entrypoint.c -o entrypoint.o
# vendoring (Note: to avoid NOTE of "Found the following hidden files and
# directories", .cargo needs to be created here)
if [ "yes" = "yes" ]; then \
	  /usr/bin/tar --extract --xz -f ./rust/vendor.tar.xz -C ./rust && \
	   mkdir -p ./rust/.cargo && \
	   cp ./cargo_vendor_config.toml ./rust/.cargo/config.toml; \
	fi
. "/Users/urbanek/.cargo/env" && export CARGO_HOME="/Volumes/Builds/packages/big-sur-x86_64/results/4.4/tergo.Rcheck/00_pkg_src/tergo/src/.cargo" && cd ./rust && cargo build --jobs 1 --lib --release --offline; \
	rm -Rf /Volumes/Builds/packages/big-sur-x86_64/results/4.4/tergo.Rcheck/00_pkg_src/tergo/src/.cargo ./rust/target//release/build
warning: a `-j` argument was passed to Cargo but Cargo is also configured with an external jobserver in its environment, ignoring the `-j` parameter
error: failed to select a version for `env_logger`.
    ... required by package `tergo-lib v0.2.8`
    ... which satisfies dependency `tergo-lib = "^0.2.8"` (locked to 0.2.8) of package `tergo v0.1.2 (/Volumes/Builds/packages/big-sur-x86_64/results/4.4/tergo.Rcheck/00_pkg_src/tergo/src/rust)`
versions that meet the requirements `^0.11.3` (locked to 0.11.5) are: 0.11.5

the package `tergo-lib` depends on `env_logger`, with features: `anstream` but `env_logger` does not have these features.
 It has an optional dependency with that name, but that dependency uses the "dep:" syntax in the features table, so it does not have an implicit feature with that name.


failed to select a version for `env_logger` which could resolve this conflict
clang -arch x86_64 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -L/Library/Frameworks/R.framework/Resources/lib -L/opt/R/x86_64/lib -o tergo.so entrypoint.o -L./rust/target//release -ltergo -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
ld: warning: directory not found for option '-L./rust/target//release'
ld: library not found for -ltergo
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [tergo.so] Error 1
ERROR: compilation failed for package ‘tergo’
* removing ‘/Volumes/Builds/packages/big-sur-x86_64/results/4.4/tergo.Rcheck/tergo’