depends: always set CMAKE_POSITION_INDEPENDENT_CODE=ON

Rather than potentially having to set this per-package, set it globally,
as this should always be what we want. Without doing this, changes in
later commits will have to add this per-package.

Similar to https://github.com/bitcoin/bitcoin/pull/29488, which is the
Autotools equivalent.

depends/funcs.mk

@@ -181,6 +181,7 @@ $(1)_cmake=env CC="$$($(1)_cc)" \
                LDFLAGS="$$($(1)_ldflags)" \
                cmake -DCMAKE_INSTALL_PREFIX:PATH="$$($($(1)_type)_prefix)" \
                -DCMAKE_INSTALL_LIBDIR=lib/ \
+               -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
                $$($(1)_config_opts)
 ifeq ($($(1)_type),build)
 $(1)_cmake += -DCMAKE_INSTALL_RPATH:PATH="$$($($(1)_type)_prefix)/lib"

depends/packages.md

@@ -163,7 +163,7 @@ From the [Gentoo Wiki entry](https://wiki.gentoo.org/wiki/Project:Quality_Assura
 >  ecosystem, as it leads to a massive number of unnecessary rebuilds.
 
 Where possible, packages are built with Position Independant Code. Either using
-the autotools `--with-pic` flag, or `DCMAKE_POSITION_INDEPENDENT_CODE` with CMake.
+the Autotools `--with-pic` flag, or `CMAKE_POSITION_INDEPENDENT_CODE` with CMake.
 
 ## Secondary dependencies:
 

depends/packages/libmultiprocess.mk

@@ -9,7 +9,6 @@ $(package)_dependencies += native_capnp
 endif
 
 define $(package)_set_vars :=
-$(package)_config_opts += -DCMAKE_POSITION_INDEPENDENT_CODE=ON
 ifneq ($(host),$(build))
 $(package)_config_opts := -DCAPNP_EXECUTABLE="$$(native_capnp_prefixbin)/capnp"
 $(package)_config_opts += -DCAPNPC_CXX_EXECUTABLE="$$(native_capnp_prefixbin)/capnpc-c++"