new(tcl-lang.org/v8 + /tk/v8): Tcl/Tk 8.6 legacy

Tcl 9.0 changed major API; many Tk-based GUIs (git-gui, python-tk,
BWidget) still pin to 8.6. Tk 9.0 also has a broken minizip Makefile
target that prevents from-source build — Tk 8.6 stays buildable.

Adding these unblocks #13057 (Tk via 9.0 → switch to v8) and
#13060 (git-gui) once the bottles are available.

Author: tannevaled

projects/tcl-lang.org/tk/v8/package.yml

@@ -0,0 +1,63 @@
+# Tk 8.6 — legacy GUI toolkit.
+#
+# Companion to tcl-lang.org/v8. Tk 9.0 has a broken `minizip` target
+# in its Makefile that fails build; 8.6.x stays buildable. Required
+# by git-gui, python-tk@3.9, and other legacy Tcl GUIs.
+
+distributable:
+  url: https://downloads.sourceforge.net/project/tcl/Tcl/{{version}}/tk{{version}}-src.tar.gz
+  strip-components: 1
+
+versions:
+  url: https://www.tcl-lang.org/software/tcltk/download.html
+  match: /tk8\.6\.\d+-src\.tar\.gz/
+  strip:
+    - /^tk/
+    - /-src\.tar\.gz/
+
+platforms:
+  - linux/x86-64
+  - linux/aarch64
+  - darwin/x86-64
+  - darwin/aarch64
+
+dependencies:
+  tcl-lang.org/v8: '*'
+  freedesktop.org/pkg-config: '*'
+  linux:
+    x.org/x11: '*'
+    x.org/exts: '*'
+    freetype.org: '*'
+
+build:
+  working-directory: unix
+  darwin:
+    working-directory: macosx
+
+  script:
+    - ./configure $ARGS
+    - make --jobs {{ hw.concurrency }}
+    - make install
+    - run: |
+        cd "{{prefix}}/bin"
+        [ ! -e wish ] && ln -sf "wish{{version.major}}.{{version.minor}}" wish || true
+
+  env:
+    CPPFLAGS: -I{{deps.tcl-lang.org/v8.prefix}}/include
+    ARGS:
+      - --prefix={{prefix}}
+      - --exec-prefix={{prefix}}
+      - --with-tcl={{deps.tcl-lang.org/v8.prefix}}/lib
+      - --enable-shared
+      - --enable-threads
+      - --enable-64bit
+    darwin:
+      ARGS:
+        - --enable-aqua
+
+test:
+  - test -f "{{prefix}}/lib/libtk{{version.major}}.{{version.minor}}.dylib" -o -f "{{prefix}}/lib/libtk{{version.major}}.{{version.minor}}.so"
+
+provides:
+  - bin/wish
+  - bin/wish{{version.major}}.{{version.minor}}

projects/tcl-lang.org/v8/package.yml

@@ -0,0 +1,54 @@
+# Tcl 8.6 — legacy line.
+#
+# The main tcl-lang.org recipe tracks 9.0.x which made backward-
+# incompatible API changes. Many extensions and Tk-based GUIs (git-gui,
+# python-tk, BWidget, expect-derived tools) still pin to 8.6.
+
+distributable:
+  url: https://downloads.sourceforge.net/project/tcl/Tcl/{{version}}/tcl{{version}}-src.tar.gz
+  strip-components: 1
+
+versions:
+  url: https://www.tcl-lang.org/software/tcltk/download.html
+  match: /tcl8\.6\.\d+-src\.tar\.gz/
+  strip:
+    - /^tcl/
+    - /-src\.tar\.gz/
+
+platforms:
+  - linux/x86-64
+  - linux/aarch64
+  - darwin/x86-64
+  - darwin/aarch64
+
+dependencies:
+  openssl.org: ^1.1
+  zlib.net: ^1.3
+
+build:
+  dependencies:
+    gnu.org/patch: '*'
+    info-zip.org/zip: '*'
+
+  working-directory: unix
+  script:
+    - ./configure $ARGS
+    - make --jobs {{ hw.concurrency }}
+    - make install
+    - make install-private-headers
+    - run: |
+        cd "{{prefix}}/bin"
+        ln -sf "tclsh{{version.major}}.{{version.minor}}" tclsh
+  env:
+    ARGS:
+      - --prefix={{prefix}}
+      - --enable-shared
+      - --enable-threads
+      - --enable-64bit
+
+test:
+  - echo 'puts "ok"' | tclsh
+
+provides:
+  - bin/tclsh
+  - bin/tclsh{{version.major}}.{{version.minor}}