capnpCMakeLists.patch

--- capnproto-0.10.4/c++/CMakeLists.txt	2023-04-13 16:14:33.000000000 +0200
+++ capnproto-0.10.4.patch/c++/CMakeLists.txt	2023-04-20 09:14:31.073828400 +0200
@@ -46,6 +46,10 @@
 # define list of values GUI will offer for the variable
 set_property(CACHE WITH_OPENSSL PROPERTY STRINGS AUTO ON OFF)
 
+set(WITH_ZLIB "AUTO" CACHE STRING
+  "Whether or not to build libkj-gzip by linking against zlib")
+set_property(CACHE WITH_ZLIB PROPERTY STRINGS AUTO ON OFF)
+
 # shadow cache variable original value with ON/OFF,
 # so from now on OpenSSL-specific code just has to check:
 #     if (WITH_OPENSSL)
@@ -64,6 +68,24 @@
   find_package(OpenSSL REQUIRED COMPONENTS Crypto SSL)
 endif()
 
+# shadow cache variable original value with ON/OFF,
+# so from now on ZLIB-specific code just has to check:
+#     if (WITH_ZLIB)
+#         ...
+#     endif()
+if(CAPNP_LITE)
+  set(WITH_ZLIB OFF)
+elseif (WITH_ZLIB STREQUAL "AUTO")
+  find_package(ZLIB)
+  if(ZLIB_FOUND)
+    set(WITH_ZLIB ON)
+  else()
+    set(WITH_ZLIB OFF)
+  endif()
+elseif (WITH_ZLIB)
+  find_package(ZLIB REQUIRED)
+endif()
+
 set(WITH_FIBERS "AUTO" CACHE STRING
   "Whether or not to build libkj-async with fibers")
 # define list of values GUI will offer for the variable