# Fix pthread support in a/src/boehm-gc

Index: b/src/boehm-gc/dyn_load.c
===================================================================
--- a/src/boehm-gc/dyn_load.c
+++ b/src/boehm-gc/dyn_load.c
@@ -26,7 +26,7 @@
  * None of this is safe with dlclose and incremental collection.
  * But then not much of anything is safe in the presence of dlclose.
  */
-#if (defined(__linux__) || defined(__GLIBC__)) && !defined(_GNU_SOURCE)
+#if (defined(__linux__) || defined(__GLIBC__) || defined(__GNU__)) && !defined(_GNU_SOURCE)
     /* Can't test LINUX, since this must be define before other includes */
 #   define _GNU_SOURCE
 #endif
Index: b/src/boehm-gc/pthread_support.c
===================================================================
--- a/src/boehm-gc/pthread_support.c
+++ b/src/boehm-gc/pthread_support.c
@@ -885,7 +885,7 @@
 	  GC_nprocs = pthread_num_processors_np();
 #       endif
 #	if defined(GC_OSF1_THREADS) || defined(GC_AIX_THREADS) \
-	   || defined(GC_SOLARIS_PTHREADS)
+	   || defined(GC_SOLARIS_PTHREADS) || defined(GC_GNU_THREADS)
 	  GC_nprocs = sysconf(_SC_NPROCESSORS_ONLN);
 	  if (GC_nprocs <= 0) GC_nprocs = 1;
 #	endif
Index: b/src/boehm-gc/include/gc_config_macros.h
===================================================================
--- a/src/boehm-gc/include/gc_config_macros.h
+++ b/src/boehm-gc/include/gc_config_macros.h
@@ -6,7 +6,8 @@
 		             || defined(GC_SOLARIS_PTHREADS) \
 			     || defined(GC_HPUX_THREADS) \
 			     || defined(GC_AIX_THREADS) \
-			     || defined(GC_LINUX_THREADS))
+			     || defined(GC_LINUX_THREADS) \
+			     || defined(GC_GNU_THREADS))
 # define _REENTRANT
 	/* Better late than never.  This fails if system headers that	*/
 	/* depend on this were previously included.			*/
@@ -21,7 +22,8 @@
 	defined(GC_HPUX_THREADS) || defined(GC_OSF1_THREADS) || \
 	defined(GC_DGUX386_THREADS) || defined(GC_DARWIN_THREADS) || \
 	defined(GC_AIX_THREADS) || \
-        (defined(GC_WIN32_THREADS) && defined(__CYGWIN32__))
+        (defined(GC_WIN32_THREADS) && defined(__CYGWIN32__)) || \
+	defined(GC_GNU_THREADS)
 #   define GC_PTHREADS
 # endif
 
Index: b/src/boehm-gc/threadlibs.c
===================================================================
--- a/src/boehm-gc/threadlibs.c
+++ b/src/boehm-gc/threadlibs.c
@@ -12,7 +12,8 @@
 #   endif
 #   if defined(GC_LINUX_THREADS) || defined(GC_IRIX_THREADS) \
 	|| defined(GC_SOLARIS_PTHREADS) \
-	|| defined(GC_DARWIN_THREADS) || defined(GC_AIX_THREADS)
+	|| defined(GC_DARWIN_THREADS) || defined(GC_AIX_THREADS) \
+	|| defined(GC_GNU_THREADS)
         printf("-lpthread\n");
 #   endif
 #   if defined(GC_FREEBSD_THREADS)
Index: b/src/boehm-gc/configure.ac
===================================================================
--- a/src/boehm-gc/configure.ac
+++ b/src/boehm-gc/configure.ac
@@ -181,6 +181,11 @@
 	THREADCFLAGS=-pthread
 	THREADLIBS=-pthread
       	;;
+     *-*-gnu*)
+	AC_DEFINE(GC_GNU_THREADS,1,[support GNU threads])
+	AC_DEFINE(_REENTRANT)
+	AC_DEFINE(THREAD_LOCAL_ALLOC)
+      	;;
      *-*-solaris2.8*)
 	AC_DEFINE(GC_SOLARIS_PTHREADS,1,[support for Solaris pthreads])
 	# Need to use alternate thread library, otherwise gctest hangs
Index: b/src/boehm-gc/os_dep.c
===================================================================
--- a/src/boehm-gc/os_dep.c
+++ b/src/boehm-gc/os_dep.c
@@ -312,7 +312,7 @@
   /* for recent Linux versions.  This seems to be the easiest way to	*/
   /* cover all versions.						*/
 
-# ifdef LINUX
+# if defined(LINUX) || defined(HURD)
     /* Some Linux distributions arrange to define __data_start.  Some	*/
     /* define data_start as a weak symbol.  The latter is technically	*/
     /* broken, since the user program may define data_start, in which	*/
@@ -331,7 +331,7 @@
   {
     extern ptr_t GC_find_limit();
 
-#   ifdef LINUX
+#   if defined(LINUX) || defined(HURD)
       /* Try the easy approaches first:	*/
       if ((ptr_t)__data_start != 0) {
 	  GC_data_start = (ptr_t)(__data_start);
Index: b/src/boehm-gc/include/private/gcconfig.h
===================================================================
--- a/src/boehm-gc/include/private/gcconfig.h
+++ b/src/boehm-gc/include/private/gcconfig.h
@@ -1316,8 +1316,9 @@
 #     define OS_TYPE "HURD"
 #     define STACK_GROWS_DOWN
 #     define HEURISTIC2
-      extern int  __data_start[];
-#     define DATASTART ( (ptr_t) (__data_start))
+#     define SIG_SUSPEND SIGUSR1
+#     define SIG_THR_RESTART SIGUSR2
+#     define SEARCH_FOR_DATA_START
       extern int   _end[];
 #     define DATAEND ( (ptr_t) (_end))
 /* #     define MPROTECT_VDB  Not quite working yet? */
@@ -2169,7 +2170,8 @@
 # if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \
 	    || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
 	    || defined(DGUX) || defined(BSD) || defined(SUNOS4) \
-	    || defined(_AIX) || defined(DARWIN) || defined(OSF1)
+	    || defined(_AIX) || defined(DARWIN) || defined(OSF1) \
+	    || defined(HURD)
 #   define UNIX_LIKE   /* Basic Unix-like system calls work.	*/
 # endif
 
@@ -2225,7 +2227,7 @@
 #   define CACHE_LINE_SIZE 32	/* Wild guess	*/
 # endif
 
-# if defined(LINUX) || defined(__GLIBC__)
+# if defined(LINUX) || defined(HURD) || defined(__GLIBC__)
 #   define REGISTER_LIBRARIES_EARLY
     /* We sometimes use dl_iterate_phdr, which may acquire an internal	*/
     /* lock.  This isn't safe after the world has stopped.  So we must	*/
@@ -2260,6 +2262,9 @@
 # if defined(GC_AIX_THREADS) && !defined(_AIX)
 	--> inconsistent configuration
 # endif
+# if defined(GC_GNU_THREADS) && !defined(HURD)
+	--> inconsistent configuration
+# endif
 # if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32)
 	--> inconsistent configuration
 # endif
Index: b/src/boehm-gc/include/gc_config.h.in
===================================================================
--- a/src/boehm-gc/include/gc_config.h.in
+++ b/src/boehm-gc/include/gc_config.h.in
@@ -33,6 +33,9 @@
 /* include support for gcj */
 #undef GC_GCJ_SUPPORT
 
+/* support GNU/Hurd threads */
+#undef GC_GNU_THREADS
+
 /* enables support for HP/UX 11 pthreads */
 #undef GC_HPUX_THREADS
 
Index: b/src/boehm-gc/specific.c
===================================================================
--- a/src/boehm-gc/specific.c
+++ b/src/boehm-gc/specific.c
@@ -13,7 +13,7 @@
 
 #include "private/gc_priv.h" /* For GC_compare_and_exchange, GC_memory_barrier */
 
-#if defined(GC_LINUX_THREADS)
+#if defined(GC_LINUX_THREADS) || defined(GC_GNU_THREADS)
 
 #include "private/specific.h"