Merge bitcoin/bitcoin#32731: depends: Build qt package for FreeBSD hosts

173394d depends: Build `qt` package for FreeBSD hosts (Hennadii Stepanov)

Pull request description:

  This PR continues the work started in bitcoin/bitcoin#23948.

  Here is an excerpt from the log:
  ```
  $ ./build/bin/bitcoin-qt -printtoconsole
  2025-06-12T01:06:56Z Bitcoin Core version v29.99.0-15de25ba2a28 (release build)
  2025-06-12T01:06:56Z Qt 6.7.3 (static), plugin=xcb
  2025-06-12T01:06:56Z Static plugins:
  2025-06-12T01:06:56Z  QMinimalIntegrationPlugin, version 395008
  2025-06-12T01:06:56Z  QXcbIntegrationPlugin, version 395008
  2025-06-12T01:06:56Z Style: fusion / QFusionStyle
  2025-06-12T01:06:56Z System: FreeBSD 14.3-RELEASE, x86_64-little_endian-lp64
  ```

  And here are the screenshots:

  ![image](https://github.com/user-attachments/assets/acf3fefc-ee3f-41cb-ab9a-3bc4d49c7054)

  ![image](https://github.com/user-attachments/assets/6280303f-9c7b-445d-8428-172ea998343d)

ACKs for top commit:
  vasild:
    ACK 173394d

Tree-SHA512: 42a0bd11e4ef1a23efcfe6c4ab179dc667a076e65060891ce8358b3fe78de4e3ea33f975387d4236cc2ac620e2935b0a29c278065a47f038c66658106bf36755

Author: fanquake

depends/README.md

@@ -33,6 +33,10 @@ To build dependencies for the current arch+OS:
 
     pkg install bash cmake curl gmake
 
+Skip the following packages if you don't intend to use the GUI and will build with [`NO_QT=1`](#dependency-options):
+
+    pkg install bison ninja pkgconf python3
+
 To build dependencies for the current arch+OS:
 
     gmake

depends/packages/packages.mk

@@ -9,6 +9,7 @@ qrencode_darwin_packages = qrencode
 qrencode_mingw32_packages = qrencode
 
 qt_linux_packages:=qt expat libxcb xcb_proto libXau xproto freetype fontconfig libxkbcommon libxcb_util libxcb_util_cursor libxcb_util_render libxcb_util_keysyms libxcb_util_image libxcb_util_wm
+qt_freebsd_packages:=$(qt_linux_packages)
 qt_darwin_packages=qt
 qt_mingw32_packages=qt
 ifneq ($(host),$(build))

depends/packages/qt.mk

@@ -7,7 +7,8 @@ $(package)_sha256_hash=$(qt_details_qtbase_sha256_hash)
 ifneq ($(host),$(build))
 $(package)_dependencies := native_$(package)
 endif
-$(package)_linux_dependencies=freetype fontconfig libxcb libxkbcommon libxcb_util libxcb_util_cursor libxcb_util_render libxcb_util_keysyms libxcb_util_image libxcb_util_wm
+$(package)_linux_dependencies := freetype fontconfig libxcb libxkbcommon libxcb_util libxcb_util_cursor libxcb_util_render libxcb_util_keysyms libxcb_util_image libxcb_util_wm
+$(package)_freebsd_dependencies := $($(package)_linux_dependencies)
 $(package)_patches_path := $(qt_details_patches_path)
 $(package)_patches := dont_hardcode_pwd.patch
 $(package)_patches += qtbase-moc-ignore-gcc-macro.patch
@@ -146,6 +147,7 @@ $(package)_config_opts_linux += -xcb
 ifneq ($(LTO),)
 $(package)_config_opts_linux += -ltcg
 endif
+$(package)_config_opts_freebsd := $$($(package)_config_opts_linux)
 
 $(package)_config_opts_mingw32 := -no-dbus
 $(package)_config_opts_mingw32 += -no-freetype

depends/toolchain.cmake.in

@@ -117,7 +117,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND NOT CMAKE_HOST_APPLE)
 endif()
 
 
-if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+if(CMAKE_SYSTEM_NAME MATCHES "^(Linux|FreeBSD)$")
   # Customize pkg-config behavior for finding dependencies
   # of the xcb QPA platform plugin:
   # 1. Restrict search paths to the depends.

src/qt/CMakeLists.txt

@@ -16,7 +16,7 @@ get_target_property(qt_lib_type Qt6::Core TYPE)
 function(import_plugins target)
   if(qt_lib_type STREQUAL "STATIC_LIBRARY")
     set(plugins Qt6::QMinimalIntegrationPlugin)
-    if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    if(CMAKE_SYSTEM_NAME MATCHES "^(Linux|FreeBSD)$")
       list(APPEND plugins Qt6::QXcbIntegrationPlugin)
     elseif(WIN32)
       list(APPEND plugins Qt6::QWindowsIntegrationPlugin Qt6::QModernWindowsStylePlugin)