gflags: alias to google-gflags

[Ma27]

Motivation for this change

Both packages referred to the same repo (gflags/gflags at GitHub),
both packages used almost the same version (2.2.1 and 2.2.0). Therefore
I think that it's just fair to drop one of the packages to avoid
duplication and reduce the maintenance overload.

I decided to drop gflags originally packaged by @shlevy as it didn't
contain testing support as google-gflags does. The package set refers
from gflags to google-gflags, so both package names remain (to avoid
any confusions), however the gflags expression is removed.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

---

[Ma27]

currently running nox-review, it might take a bit time though.....

[Mic92]

@GrahamcOfBorg build gflags

[GrahamcOfBorg]

Success on x86_64-darwin (full log)

Attempted: gflags

Partial log (click to expand)

-- Installing: /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/lib/cmake/gflags/gflags-targets.cmake
-- Installing: /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/lib/cmake/gflags/gflags-targets-release.cmake
-- Installing: /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/bin/gflags_completions.sh
-- Installing: /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/lib/pkgconfig/gflags.pc
post-installation fixup
strip is /nix/store/kdff2gim6417493yha769kh00n63lnrw-cctools-binutils-darwin/bin/strip
stripping (with command strip and flags -S) in /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/lib  /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/bin
patching script interpreter paths in /nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1
/nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1/bin/gflags_completions.sh: interpreter directive changed from "/bin/bash" to "/nix/store/r8bx3qf1bpncb14i9gzma4vr089pc3pv-bash-4.4-p19/bin/bash"
/nix/store/nq8d414sx5mlc253fh87a7wq1d897jxb-google-gflags-2.2.1

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: gflags

Partial log (click to expand)

post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1
shrinking /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1/lib/libgflags_nothreads.so.2.2.1
shrinking /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1/lib/libgflags.so.2.2.1
strip is /nix/store/j7d4mr0ikv974ig7yzhknpsq288js4bs-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1/lib  /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1/bin
patching script interpreter paths in /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1
/nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1/bin/gflags_completions.sh: interpreter directive changed from "/bin/bash" to "/nix/store/adw9jx59wnrh5659wz43nbjya3m4b3gl-bash-4.4-p19/bin/bash"
checking for references to /build in /nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1...
/nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: gflags

Partial log (click to expand)

post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1
shrinking /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1/lib/libgflags_nothreads.so.2.2.1
shrinking /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1/lib/libgflags.so.2.2.1
strip is /nix/store/j75dgadrff2d1fyc4fczmcgqkid2imdx-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1/lib  /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1/bin
patching script interpreter paths in /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1
/nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1/bin/gflags_completions.sh: interpreter directive changed from "/bin/bash" to "/nix/store/xn5gv3lpfy91yvfy9b0i7klfcxh9xskz-bash-4.4-p19/bin/bash"
checking for references to /build in /nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1...
/nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: gflags

Partial log (click to expand)

/nix/store/sj3smj1ra5bjw68nardciwdhdcc441w2-google-gflags-2.2.1

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: gflags

Partial log (click to expand)

/nix/store/r6pgrqz3yrhkjmm5bcllygzanj734vrd-google-gflags-2.2.1