Merge pull request #56969 from knl/build-strongswan-on-macos

strongswan: Make it build on macOS

pkgs/tools/networking/strongswan/default.nix

@@ -8,6 +8,7 @@
 , enableTNC            ? false, trousers, sqlite, libxml2
 , enableNetworkManager ? false, networkmanager
 , libpcap
+, darwin
 }:
 
 # Note on curl support: If curl is built with gnutls as its backend, the
@@ -29,9 +30,10 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig autoreconfHook ];
   buildInputs =
-    [ curl gmp python iptables ldns unbound openssl pcsclite ]
+    [ curl gmp python ldns unbound openssl pcsclite ]
     ++ optionals enableTNC [ trousers sqlite libxml2 ]
-    ++ optionals stdenv.isLinux [ systemd.dev pam ]
+    ++ optionals stdenv.isLinux [ systemd.dev pam iptables ]
+    ++ optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ SystemConfiguration ])
     ++ optionals enableNetworkManager [ networkmanager ]
     # ad-hoc fix for https://github.com/NixOS/nixpkgs/pull/51787
     # Remove when the above PR lands in master
@@ -41,23 +43,24 @@ stdenv.mkDerivation rec {
     ./ext_auth-path.patch
     ./firewall_defaults.patch
     ./updown-path.patch
-    (substituteAll {
+    (optional stdenv.isLinux (substituteAll {
       src = ./modprobe-path.patch;
       inherit kmod;
-    })
+    }))
   ];
 
   postPatch = ''
-    substituteInPlace src/libcharon/plugins/resolve/resolve_handler.c --replace "/sbin/resolvconf" "${openresolv}/sbin/resolvconf"
-
     # swanctl can be configured by files in SWANCTLDIR which defaults to
     # $out/etc/swanctl. Since that directory is in the nix store users can't
     # modify it. Ideally swanctl accepts a command line option for specifying
     # the configuration files. In the absence of that we patch swanctl to look
     # for configuration files in /etc/swanctl.
     substituteInPlace src/swanctl/swanctl.h --replace "SWANCTLDIR" "\"/etc/swanctl\""
+    '' + optionalString stdenv.isLinux ''
     # glibc-2.26 reorganized internal includes
     sed '1i#include <stdint.h>' -i src/libstrongswan/utils/utils/memory.h
+
+    substituteInPlace src/libcharon/plugins/resolve/resolve_handler.c --replace "/sbin/resolvconf" "${openresolv}/sbin/resolvconf"
     '';
 
   preConfigure = ''
@@ -65,17 +68,24 @@ stdenv.mkDerivation rec {
   '';
 
   configureFlags =
-    [ "--enable-swanctl" "--enable-cmd" "--enable-systemd"
-      "--enable-farp" "--enable-dhcp"
+    [ "--enable-swanctl"
+      "--enable-cmd"
       "--enable-openssl"
       "--enable-eap-sim" "--enable-eap-sim-file" "--enable-eap-simaka-pseudonym"
       "--enable-eap-simaka-reauth" "--enable-eap-identity" "--enable-eap-md5"
       "--enable-eap-gtc" "--enable-eap-aka" "--enable-eap-aka-3gpp2"
       "--enable-eap-mschapv2" "--enable-eap-radius" "--enable-xauth-eap" "--enable-ext-auth"
-      "--enable-forecast" "--enable-connmark" "--enable-acert"
+      "--enable-acert"
       "--enable-pkcs11" "--enable-eap-sim-pcsc" "--enable-dnscert" "--enable-unbound"
-      "--enable-af-alg" "--enable-xauth-pam" "--enable-chapoly"
+      "--enable-chapoly"
       "--enable-curl" ]
+    ++ optionals stdenv.isLinux [
+      "--enable-farp" "--enable-dhcp"
+      "--enable-systemd"
+      "--enable-xauth-pam"
+      "--enable-forecast"
+      "--enable-connmark"
+      "--enable-af-alg" ]
     ++ optionals stdenv.isx86_64 [ "--enable-aesni" "--enable-rdrand" ]
     ++ optional (stdenv.hostPlatform.system == "i686-linux") "--enable-padlock"
     ++ optionals enableTNC [
@@ -89,7 +99,17 @@ stdenv.mkDerivation rec {
          "--enable-sqlite" ]
     ++ optionals enableNetworkManager [
          "--enable-nm"
-         "--with-nm-ca-dir=/etc/ssl/certs"
+         "--with-nm-ca-dir=/etc/ssl/certs" ]
+    # Taken from: https://wiki.strongswan.org/projects/strongswan/wiki/MacOSX
+    ++ optionals stdenv.isDarwin [
+      "--disable-systemd"
+      "--disable-xauth-pam"
+      "--disable-kernel-netlink"
+      "--enable-kernel-pfkey"
+      "--enable-kernel-pfroute"
+      "--enable-kernel-libipsec"
+      "--enable-osx-attr"
+      "--disable-scripts"
     ];
 
   postInstall = ''
@@ -97,7 +117,7 @@ stdenv.mkDerivation rec {
     echo "include /etc/ipsec.secrets" >> $out/etc/ipsec.secrets
   '';
 
-  NIX_LDFLAGS = "-lgcc_s" ;
+  NIX_LDFLAGS = optionalString stdenv.cc.isGNU "-lgcc_s" ;
 
   meta = {
     description = "OpenSource IPsec-based VPN Solution";