Merge pull request #11221 from pinotree/hurd-fixes

Some fixes for GNU/Hurd

mk/platform.mk

@@ -29,4 +29,8 @@ ifdef HOST_OS
     HOST_SOLARIS = 1
     HOST_UNIX = 1
   endif
+  ifeq ($(HOST_KERNEL), gnu)
+    HOST_HURD = 1
+    HOST_UNIX = 1
+  endif
 endif

src/libutil/current-process.cc

@@ -137,7 +137,7 @@ std::optional<Path> getSelfExe()
 {
     static auto cached = []() -> std::optional<Path>
     {
-        #if __linux__
+        #if __linux__ || __GNU__
         return readLink("/proc/self/exe");
         #elif __APPLE__
         char buf[1024];

tests/unit/libutil/tests.cc

@@ -17,6 +17,10 @@
 # define FS_ROOT FS_SEP
 #endif
 
+#ifndef PATH_MAX
+# define PATH_MAX 4096
+#endif
+
 namespace nix {
 
 /* ----------- tests for util.hh ------------------------------------------------*/