depends: always set CMAKE_INSTALL_LIBDIR=lib/

Rather than setting this per package, set it globally, as this is always
what we want. Without doing this, later commit will have to add the same
doc + change to more packages.

depends/packages/capnp.mk

@@ -5,15 +5,10 @@ $(package)_download_file=$(native_$(package)_download_file)
 $(package)_file_name=$(native_$(package)_file_name)
 $(package)_sha256_hash=$(native_$(package)_sha256_hash)
 
-# Hardcode library install path to "lib" to match the PKG_CONFIG_PATH
-# setting in depends/config.site.in, which also hardcodes "lib".
-# Without this setting, cmake by default would use the OS library
-# directory, which might be "lib64" or something else, not "lib", on multiarch systems.
 define $(package)_set_vars :=
   $(package)_config_opts := -DBUILD_TESTING=OFF
   $(package)_config_opts += -DWITH_OPENSSL=OFF
   $(package)_config_opts += -DWITH_ZLIB=OFF
-  $(package)_config_opts += -DCMAKE_INSTALL_LIBDIR=lib/
 endef
 
 define $(package)_config_cmds

depends/packages/libmultiprocess.mk

@@ -8,12 +8,7 @@ ifneq ($(host),$(build))
 $(package)_dependencies += native_capnp
 endif
 
-# Hardcode library install path to "lib" to match the PKG_CONFIG_PATH
-# setting in depends/config.site.in, which also hardcodes "lib".
-# Without this setting, cmake by default would use the OS library
-# directory, which might be "lib64" or something else, not "lib", on multiarch systems.
 define $(package)_set_vars :=
-$(package)_config_opts += -DCMAKE_INSTALL_LIBDIR=lib/
 $(package)_config_opts += -DCMAKE_POSITION_INDEPENDENT_CODE=ON
 ifneq ($(host),$(build))
 $(package)_config_opts := -DCAPNP_EXECUTABLE="$$(native_capnp_prefixbin)/capnp"