Merge bitcoin/bitcoin#23948: build: add support for FreeBSD to depends

ae9175f608 build: add FreeBSD support to depends (fanquake)

Pull request description:

  Setup to use the system Clang (11.0.1 as of FreeBSD 13.0).

  Doesn't build the Qt package; that requires a few additional changes. The current issue is that FreeBSDs `byacc` seems to have an issue parsing something in libxkbcommon. Work in progress branch here: https://github.com/fanquake/bitcoin/tree/depends_support_freebsd_qt. In any case, I don't think building the Qt libs on FreeBSD is a super high priority (I'd also have no way to test the GUI).

ACKs for top commit:
  laanwj:
    ACK ae9175f608

Tree-SHA512: 1ecc7855f0195f68c96e534bd77ce17c3975db1dfb3caa35302c2b46643c8c30f75b1c2e1735cf69f1eddb70447d11e67e7f339ef5497336cdff7a59b32be961

depends/packages/bdb.mk

@@ -10,6 +10,7 @@ define $(package)_set_vars
 $(package)_config_opts=--disable-shared --enable-cxx --disable-replication --enable-option-checking
 $(package)_config_opts_mingw32=--enable-mingw
 $(package)_config_opts_linux=--with-pic
+$(package)_config_opts_freebsd=--with-pic
 $(package)_config_opts_android=--with-pic
 $(package)_cflags+=-Wno-error=implicit-function-declaration
 $(package)_cxxflags+=-std=c++17

depends/packages/boost.mk

@@ -25,6 +25,7 @@ endif
 $(package)_config_libraries=filesystem,system,test
 $(package)_cxxflags+=-std=c++17
 $(package)_cxxflags_linux=-fPIC
+$(package)_cxxflags_freebsd=-fPIC
 $(package)_cxxflags_android=-fPIC
 $(package)_cxxflags_x86_64=-fcf-protection=full
 endef

depends/packages/libevent.mk

@@ -12,6 +12,7 @@ define $(package)_set_vars
   $(package)_config_opts += --disable-dependency-tracking --enable-option-checking
   $(package)_config_opts_release=--disable-debug-mode
   $(package)_config_opts_linux=--with-pic
+  $(package)_config_opts_freebsd=--with-pic
   $(package)_config_opts_android=--with-pic
   $(package)_cppflags_mingw32=-D_WIN32_WINNT=0x0601
 endef

depends/packages/sqlite.mk

@@ -7,6 +7,7 @@ $(package)_sha256_hash=486748abfb16abd8af664e3a5f03b228e5f124682b0c942e157644bf6
 define $(package)_set_vars
 $(package)_config_opts=--disable-shared --disable-readline --disable-dynamic-extensions --enable-option-checking
 $(package)_config_opts_linux=--with-pic
+$(package)_config_opts_freebsd=--with-pic
 endef
 
 define $(package)_preprocess_cmds

depends/packages/zeromq.mk

@@ -12,6 +12,7 @@ define $(package)_set_vars
   $(package)_config_opts += --disable-libunwind --disable-radix-tree --without-gcov --disable-dependency-tracking
   $(package)_config_opts += --disable-Werror --disable-drafts --enable-option-checking
   $(package)_config_opts_linux=--with-pic
+  $(package)_config_opts_freebsd=--with-pic
   $(package)_config_opts_android=--with-pic
   $(package)_cxxflags+=-std=c++17
 endef