Merge #21375: guix: Misc feedback-based fixes + hier restructuring

7476b46f18 guix: Build dmg as a static binary (Carl Dong)
06d6cf6784 depends: libdmg-hfsplus: Skip CMake RPATH patching (Carl Dong)
65176ab573 guix: Remove codesign_allocate+pagestuff from unsigned tarball (Carl Dong)
ca85679eb4 guix: Use clang-toolchain instead of clang (Carl Dong)
1aec0eda8f guix: Fallback to local build for substitute-enabled Guix users (Carl Dong)
1742f8e12d guix: Add early health check for guix-daemon (Carl Dong)
c1ae726a13 guix: More thoroughly control native toolchain (Carl Dong)
39741128d3 guix: Supply --link-profile (Carl Dong)
d55a1056ee guix: Add troubleshooting documentation entries (Carl Dong)
7f401c953f guix: Adapt guix-build to prelude, restructure hier (Carl Dong)
4eccf063b2 guix: Remove guix-build.sh filename extension (Carl Dong)
7753357a7b guix: Add source-able bash prelude and utils (Carl Dong)
e5b49a01f5 guix: Create windeploy inside distsrc-* (Carl Dong)
3e9982ab38 contrib: Silence git-describe when looking for tag (Carl Dong)
d5a71e9785 guix: Use --cores instead of --max-jobs (Carl Dong)

Pull request description:

  This PR addresses a few hiccups encountered by the brave souls who've been experimenting with the Guix scripts:
  - Resolves confusion between `--cores=` and `--max-jobs=`
    - `guix`'s `--cores=` actually corresponds to make's `--jobs=`, so let's just control `--cores=` with our overridable env var
  - `git-describe` will scream `fatal: no tag exactly matches '<hash>'` when looking for a tag, but we don't care, so silence that
  - `windeploy/unsigned` should be inside `distsrc-*` and created idempotently (sorry I know this one annoyed people)
  - Add troubleshooting documentation to `README.md`
  - Add early health check for `guix-daemon` in case user forgot to start a `guix-daemon`
  - Depending on configuration, a `--fallback` flag may be needed to tell Guix to not fail if substitutes fail but fallback to building locally
  - `codesign_allocate` and `pagestuff` are now unnecessary for codesigning as we're now using `signapple`

  A few robustness changes are also included:
  - We supply the `--link-profile` flag, as some Guix packages may expect the profile to be available under `$HOME/.guix-profile`
  - We now clear and manually set all toolchain-related env vars (e.g. `C*_INCLUDE_PATH`) ourselves, after patching a Qt::moc bug
  - We use the native `clang-toolchain` package for darwin builds instead of `clang`, lining up with all our other toolchain packages.

  Finally, we restructure the guix building hierarchy such that it looks something like:
  ```
  guix-build-<short-hash-or-version-tag>
  ├── distsrc-<short-hash-or-version-tag>-${HOST}
  │   ├── contrib
  │   ├── depends
  │   ├── src
  │   └── ...
  ├── distsrc-<short-hash-or-version-tag>-...
  └── output
      ├── dist-archive
      │   └── bitcoin-<short-hash-or-version-tag>.tar.gz
      ├── *-linux-*
      │   ├── bitcoin-<short-hash-or-version-tag>-*-linux-*-debug.tar.gz
      │   └── bitcoin-<short-hash-or-version-tag>-*-linux-*.tar.gz
      ├── x86_64-apple-darwin18
      │   ├── bitcoin-<short-hash-or-version-tag>-osx64.tar.gz
      │   ├── bitcoin-<short-hash-or-version-tag>-osx-unsigned.dmg
      │   └── bitcoin-<short-hash-or-version-tag>-osx-unsigned.tar.gz
      └── x86_64-w64-mingw32
          ├── bitcoin-<short-hash-or-version-tag>-win64-debug.zip
          ├── bitcoin-<short-hash-or-version-tag>-win64-setup-unsigned.exe
          ├── bitcoin-<short-hash-or-version-tag>-win64.zip
          └── bitcoin-<short-hash-or-version-tag>-win-unsigned.tar.gz
  ```
  Separating guix builds by their version identifier (basically namespacing them) allows us to change the layout in the future without worry about potential naming conflicts.

ACKs for top commit:
  sipa:
    ACK 7476b46f18
  laanwj:
    ACK 7476b46f18

Tree-SHA512: 0e899aa941aafdf552b2a7e8a08131ee9283180bbef7334439e2461a02aa7235ab7b9ca9c149b80fc5d0a9f4bbd35bc80fcee26197c0836ba8eaf2d86ffa0386

depends/Makefile

@@ -141,8 +141,8 @@ build_id_string+=system_clang
 $(host_arch)_$(host_os)_id_string+=system_clang
 endif
 
-build_id_string+=GUIX_ENVIRONMENT=$(GUIX_ENVIRONMENT)
-$(host_arch)_$(host_os)_id_string+=GUIX_ENVIRONMENT=$(GUIX_ENVIRONMENT)
+build_id_string+=GUIX_ENVIRONMENT=$(realpath $(GUIX_ENVIRONMENT))
+$(host_arch)_$(host_os)_id_string+=GUIX_ENVIRONMENT=$(realpath $(GUIX_ENVIRONMENT))
 
 qrencode_packages_$(NO_QR) = $(qrencode_packages)
 

depends/packages/native_libdmg-hfsplus.mk

@@ -12,7 +12,7 @@ define $(package)_preprocess_cmds
 endef
 
 define $(package)_config_cmds
-  $($(package)_cmake) -DCMAKE_C_FLAGS="$$($(1)_cflags) -Wl,--build-id=none" ..
+  $($(package)_cmake) -DCMAKE_C_FLAGS="$$($(1)_cflags) -Wl,--build-id=none" -DCMAKE_SKIP_RPATH="ON" -DCMAKE_EXE_LINKER_FLAGS="-static" -DCMAKE_FIND_LIBRARY_SUFFIXES=".a" ..
 endef
 
 define $(package)_build_cmds

depends/packages/qt.mk

@@ -10,7 +10,7 @@ $(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_no_printer.patch no
 $(package)_patches+= fix_android_qmake_conf.patch fix_android_jni_static.patch dont_hardcode_pwd.patch
 $(package)_patches+= drop_lrelease_dependency.patch no_sdk_version_check.patch
 $(package)_patches+= fix_qpainter_non_determinism.patch fix_lib_paths.patch fix_android_pch.patch
-$(package)_patches+= fix_bigsur_drawing.patch
+$(package)_patches+= fix_bigsur_drawing.patch qtbase-moc-ignore-gcc-macro.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=e1de58ed108b7e0a138815ea60fd46a2c4e1fc31396a707e5630e92de79c53de
@@ -232,6 +232,7 @@ define $(package)_preprocess_cmds
   patch -p1 -i $($(package)_patch_dir)/no_sdk_version_check.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_lib_paths.patch && \
   patch -p1 -i $($(package)_patch_dir)/fix_bigsur_drawing.patch && \
+  patch -p1 -i $($(package)_patch_dir)/qtbase-moc-ignore-gcc-macro.patch && \
   sed -i.old "s|updateqm.commands = \$$$$\$$$$LRELEASE|updateqm.commands = $($(package)_extract_dir)/qttools/bin/lrelease|" qttranslations/translations/translations.pro && \
   mkdir -p qtbase/mkspecs/macx-clang-linux &&\
   cp -f qtbase/mkspecs/macx-clang/qplatformdefs.h qtbase/mkspecs/macx-clang-linux/ &&\

depends/patches/qt/qtbase-moc-ignore-gcc-macro.patch

@@ -0,0 +1,17 @@
+The moc executable loops through headers on CPLUS_INCLUDE_PATH and stumbles
+on the GCC internal _GLIBCXX_VISIBILITY macro.  Tell it to ignore it as it is
+not supposed to be looking there to begin with.
+
+Upstream report: https://bugreports.qt.io/browse/QTBUG-83160
+
+diff --git a/qtbase/src/tools/moc/main.cpp b/qtbase/src/tools/moc/main.cpp
+--- a/qtbase/src/tools/moc/main.cpp
++++ b/qtbase/src/tools/moc/main.cpp
+@@ -188,6 +188,7 @@ int runMoc(int argc, char **argv)
+     dummyVariadicFunctionMacro.arguments += Symbol(0, PP_IDENTIFIER, "__VA_ARGS__");
+     pp.macros["__attribute__"] = dummyVariadicFunctionMacro;
+     pp.macros["__declspec"] = dummyVariadicFunctionMacro;
++    pp.macros["_GLIBCXX_VISIBILITY"] = dummyVariadicFunctionMacro;
+ 
+     QString filename;
+     QString output;