depends: add zeromq mktemp macos patch

depends/packages/zeromq.mk

@@ -3,7 +3,8 @@ $(package)_version=4.3.5
 $(package)_download_path=https://github.com/zeromq/libzmq/releases/download/v$($(package)_version)/
 $(package)_file_name=$(package)-$($(package)_version).tar.gz
 $(package)_sha256_hash=6653ef5910f17954861fe72332e68b03ca6e4d9c7160eb3a8de5a5a913bfab43
-$(package)_patches=remove_libstd_link.patch
+$(package)_patches = remove_libstd_link.patch
+$(package)_patches += macos_mktemp_check.patch
 
 define $(package)_set_vars
   $(package)_config_opts = --without-docs --disable-shared --disable-valgrind
@@ -14,7 +15,8 @@ define $(package)_set_vars
 endef
 
 define $(package)_preprocess_cmds
-  patch -p1 < $($(package)_patch_dir)/remove_libstd_link.patch
+  patch -p1 < $($(package)_patch_dir)/remove_libstd_link.patch && \
+  patch -p1 < $($(package)_patch_dir)/macos_mktemp_check.patch
 endef
 
 define $(package)_config_cmds

depends/patches/zeromq/macos_mktemp_check.patch

@@ -0,0 +1,16 @@
+build: fix mkdtemp check on macOS
+
+On macOS, mkdtemp is in unistd.h. Fix the CMake check so that is works.
+Upstreamed in https://github.com/zeromq/libzmq/pull/4668.
+
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -599,7 +599,7 @@ if(NOT MSVC)
+
+   check_cxx_symbol_exists(fork unistd.h HAVE_FORK)
+   check_cxx_symbol_exists(gethrtime sys/time.h HAVE_GETHRTIME)
+-  check_cxx_symbol_exists(mkdtemp stdlib.h HAVE_MKDTEMP)
++  check_cxx_symbol_exists(mkdtemp "stdlib.h;unistd.h" HAVE_MKDTEMP)
+   check_cxx_symbol_exists(accept4 sys/socket.h HAVE_ACCEPT4)
+   check_cxx_symbol_exists(strnlen string.h HAVE_STRNLEN)
+ else()