cppzmq: make zeromq propagatedBuildInput

cppzmq is a header-only library. As such, it is not much useful
without zeromq, whose headers it includes. By having zeromq in
propagatedBuildInputs, we can simplify dependent expressions.

This change is motivated by
https://github.com/lopsided98/nix-ros-overlay/issues/255#issuecomment-1487590226.
The expressions in nix-ros-overlay are automatically generated and
since packages in other distributions where ROS runs need not to
explicitly depend on zeromq, the Nix expression should behave the
same. This way, nix-ros-overlay will not to have manually
patch/overlay the automatically generated expressions.

pkgs/applications/blockchains/aeon/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkg-config, git, doxygen, graphviz
 , boost, miniupnpc, openssl, unbound, cppzmq
-, zeromq, pcsclite, readline, libsodium
+, pcsclite, readline, libsodium
 }:
 
 let
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
 
   buildInputs = [
     boost miniupnpc openssl unbound
-    cppzmq zeromq pcsclite readline libsodium
+    cppzmq pcsclite readline libsodium
   ];
 
   cmakeFlags = [

pkgs/applications/blockchains/masari/default.nix

@@ -1,5 +1,5 @@
 { lib, stdenv, fetchFromGitHub, cmake, pkg-config, unbound, openssl, boost
-, lmdb, miniupnpc, readline, git, zeromq, libsodium, rapidjson, cppzmq }:
+, lmdb, miniupnpc, readline, git, libsodium, rapidjson, cppzmq }:
 
 stdenv.mkDerivation rec {
   pname = "masari";
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     boost miniupnpc openssl unbound
-    zeromq  readline libsodium
+    readline libsodium
     rapidjson cppzmq
   ];
 

pkgs/applications/radio/gnuradio/3.8.nix

@@ -25,7 +25,6 @@
 , SDL
 , gsl
 , cppzmq
-, zeromq
 # Needed only if qt-gui is disabled, from some reason
 , icu
 # GUI related
@@ -203,7 +202,7 @@ let
       runtime = [ gsl ];
     };
     gr-zeromq = {
-      runtime = [ cppzmq zeromq ];
+      runtime = [ cppzmq ];
       cmakeEnableFlag = "GR_ZEROMQ";
     };
   };

pkgs/applications/radio/gnuradio/3.9.nix

@@ -28,7 +28,6 @@
 , libunwind
 , thrift
 , cppzmq
-, zeromq
 # Needed only if qt-gui is disabled, from some reason
 , icu
 # GUI related
@@ -228,7 +227,7 @@ let
       runtime = [ gsl libsodium ];
     };
     gr-zeromq = {
-      runtime = [ cppzmq zeromq ];
+      runtime = [ cppzmq ];
       cmakeEnableFlag = "GR_ZEROMQ";
     };
     gr-network = {

pkgs/applications/radio/gnuradio/default.nix

@@ -30,7 +30,6 @@
 , libunwind
 , thrift
 , cppzmq
-, zeromq
 # Needed only if qt-gui is disabled, from some reason
 , icu
 # GUI related
@@ -247,7 +246,7 @@ let
       runtime = [ gsl libsodium ];
     };
     gr-zeromq = {
-      runtime = [ cppzmq zeromq ];
+      runtime = [ cppzmq ];
       cmakeEnableFlag = "GR_ZEROMQ";
     };
     gr-network = {

pkgs/applications/radio/qradiolink/default.nix

@@ -19,7 +19,6 @@
 , speex
 , speexdsp
 , cppzmq
-, zeromq
 }:
 
 gnuradio3_8.pkgs.mkDerivation rec {
@@ -67,7 +66,6 @@ gnuradio3_8.pkgs.mkDerivation rec {
     libftdi
     libsndfile
     cppzmq
-    zeromq
     gnuradio3_8.qwt
   ] ++ lib.optionals (gnuradio3_8.hasFeature "gr-ctrlport") [
     thrift

pkgs/applications/science/electronics/horizon-eda/default.nix

@@ -19,7 +19,6 @@
 , python3
 , sqlite
 , wrapGAppsHook
-, zeromq
 }:
 
 stdenv.mkDerivation rec {
@@ -48,7 +47,6 @@ stdenv.mkDerivation rec {
     podofo
     python3
     sqlite
-    zeromq
   ];
 
   nativeBuildInputs = [

pkgs/development/libraries/cppzmq/default.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ zeromq ];
+  propagatedBuildInputs = [ zeromq ];
 
   cmakeFlags = [
     # Tests try to download googletest at compile time; there is no option