build: Avoid getrandom@GLIBC_2.25 symbol in libevent package

Author: hebasto

depends/packages/libevent.mk

@@ -3,6 +3,7 @@ $(package)_version=2.1.12-stable
 $(package)_download_path=https://github.com/libevent/libevent/releases/download/release-$($(package)_version)/
 $(package)_file_name=$(package)-$($(package)_version).tar.gz
 $(package)_sha256_hash=92e6de1be9ec176428fd2367677e61ceffc2ee1cb119035037a27d346b0403bb
+$(package)_patches = glibc_compatibility.patch
 
 # When building for Windows, we set _WIN32_WINNT to target the same Windows
 # version as we do in configure. Due to quirks in libevents build system, this
@@ -16,6 +17,10 @@ define $(package)_set_vars
   $(package)_cppflags_mingw32=-D_WIN32_WINNT=0x0601
 endef
 
+define $(package)_preprocess_cmds
+  patch -p1 -i $($(package)_patch_dir)/glibc_compatibility.patch
+endef
+
 define $(package)_config_cmds
   $($(package)_autoconf)
 endef

depends/patches/libevent/glibc_compatibility.patch

@@ -0,0 +1,14 @@
+Avoid getrandom@GLIBC_2.25 symbol.
+
+--- old/config.h.in
++++ new/config.h.in
+@@ -101,9 +101,6 @@
+ /* Define to 1 if you have the `getprotobynumber' function. */
+ #undef HAVE_GETPROTOBYNUMBER
+ 
+-/* Define to 1 if you have the `getrandom' function. */
+-#undef HAVE_GETRANDOM
+-
+ /* Define to 1 if you have the `getservbyname' function. */
+ #undef HAVE_GETSERVBYNAME
+