libgo: add configury and sysinfo support for hurd

    
    Patch by Svante Signell.
    
    Reviewed-on: https://go-review.googlesource.com/c/160824

From-SVN: r268461

7 files changed, 57 insertions, 6 deletions

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 8eacf778498..1036fc953e2 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-87dd981901c645a7d54a52c5f4c35caec31a8978
+51fb93fd71b8a0a690455dfdd3d12b2aa0171f5c
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/Makefile.am b/libgo/Makefile.am
index 1d62f11b69c..1f78111445b 100644
--- a/libgo/Makefile.am
+++ b/libgo/Makefile.am
@@ -428,6 +428,9 @@ else
 if LIBGO_IS_AIX
 runtime_getncpu_file = runtime/getncpu-aix.c
 else
+if LIBGO_IS_HURD
+runtime_getncpu_file = runtime/getncpu-hurd.c
+else
 runtime_getncpu_file = runtime/getncpu-none.c
 endif
 endif
@@ -436,6 +439,7 @@ endif
 endif
 endif
 endif
+endif
 
 runtime_files = \
 	runtime/aeshash.c \
diff --git a/libgo/Makefile.in b/libgo/Makefile.in
index 04cce140664..0b26158dd7d 100644
--- a/libgo/Makefile.in
+++ b/libgo/Makefile.in
@@ -230,7 +230,8 @@ am__DEPENDENCIES_4 = $(am__DEPENDENCIES_2) \
 libgo_llgo_la_DEPENDENCIES = $(am__DEPENDENCIES_4)
 @LIBGO_IS_RTEMS_TRUE@am__objects_1 =  \
 @LIBGO_IS_RTEMS_TRUE@	runtime/rtems-task-variable-add.lo
-@LIBGO_IS_AIX_FALSE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = runtime/getncpu-none.lo
+@LIBGO_IS_AIX_FALSE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_HURD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = runtime/getncpu-none.lo
+@LIBGO_IS_AIX_FALSE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_HURD_TRUE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = runtime/getncpu-hurd.lo
 @LIBGO_IS_AIX_TRUE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = runtime/getncpu-aix.lo
 @LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_TRUE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = runtime/getncpu-bsd.lo
 @LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_TRUE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_SOLARIS_FALSE@am__objects_2 = runtime/getncpu-bsd.lo
@@ -855,7 +856,8 @@ noinst_DATA = internal/x/net/internal/nettest.gox \
 	zdefaultcc.go
 @LIBGO_IS_RTEMS_FALSE@rtems_task_variable_add_file = 
 @LIBGO_IS_RTEMS_TRUE@rtems_task_variable_add_file = runtime/rtems-task-variable-add.c
-@LIBGO_IS_AIX_FALSE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@runtime_getncpu_file = runtime/getncpu-none.c
+@LIBGO_IS_AIX_FALSE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_HURD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@runtime_getncpu_file = runtime/getncpu-none.c
+@LIBGO_IS_AIX_FALSE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_HURD_TRUE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@runtime_getncpu_file = runtime/getncpu-hurd.c
 @LIBGO_IS_AIX_TRUE@@LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_FALSE@@LIBGO_IS_SOLARIS_FALSE@runtime_getncpu_file = runtime/getncpu-aix.c
 @LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_FALSE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_NETBSD_TRUE@@LIBGO_IS_SOLARIS_FALSE@runtime_getncpu_file = runtime/getncpu-bsd.c
 @LIBGO_IS_DARWIN_FALSE@@LIBGO_IS_FREEBSD_TRUE@@LIBGO_IS_IRIX_FALSE@@LIBGO_IS_LINUX_FALSE@@LIBGO_IS_SOLARIS_FALSE@runtime_getncpu_file = runtime/getncpu-bsd.c
@@ -1378,6 +1380,8 @@ runtime/rtems-task-variable-add.lo: runtime/$(am__dirstamp) \
 	runtime/$(DEPDIR)/$(am__dirstamp)
 runtime/getncpu-none.lo: runtime/$(am__dirstamp) \
 	runtime/$(DEPDIR)/$(am__dirstamp)
+runtime/getncpu-hurd.lo: runtime/$(am__dirstamp) \
+	runtime/$(DEPDIR)/$(am__dirstamp)
 runtime/getncpu-aix.lo: runtime/$(am__dirstamp) \
 	runtime/$(DEPDIR)/$(am__dirstamp)
 runtime/getncpu-bsd.lo: runtime/$(am__dirstamp) \
@@ -1407,6 +1411,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/env_posix.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/getncpu-aix.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/getncpu-bsd.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/getncpu-hurd.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/getncpu-irix.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/getncpu-linux.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@runtime/$(DEPDIR)/getncpu-none.Plo@am__quote@
diff --git a/libgo/configure b/libgo/configure
index 138a9c6a6a8..0b8ebce3f9c 100755
--- a/libgo/configure
+++ b/libgo/configure
@@ -669,6 +669,8 @@ ALLGOOS
 GOOS
 LIBGO_IS_BSD_FALSE
 LIBGO_IS_BSD_TRUE
+LIBGO_IS_HURD_FALSE
+LIBGO_IS_HURD_TRUE
 LIBGO_IS_AIX_FALSE
 LIBGO_IS_AIX_TRUE
 LIBGO_IS_SOLARIS_FALSE
@@ -11341,7 +11343,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11344 "configure"
+#line 11346 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11447,7 +11449,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11450 "configure"
+#line 11452 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13756,6 +13758,7 @@ is_dragonfly=no
 is_rtems=no
 is_solaris=no
 is_aix=no
+is_hurd=no
 GOOS=unknown
 case ${host} in
   *-*-darwin*)   is_darwin=yes;  GOOS=darwin ;;
@@ -13768,6 +13771,7 @@ case ${host} in
   *-*-rtems*)    is_rtems=yes;   GOOS=rtems ;;
   *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
   *-*-aix*)      is_aix=yes;     GOOS=aix ;;
+  *-*-gnu*)      is_hurd=yes;    GOOS=hurd ;;
 esac
  if test $is_darwin = yes; then
   LIBGO_IS_DARWIN_TRUE=
@@ -13849,6 +13853,14 @@ else
   LIBGO_IS_AIX_FALSE=
 fi
 
+ if test $is_hurd = yes; then
+  LIBGO_IS_HURD_TRUE=
+  LIBGO_IS_HURD_FALSE='#'
+else
+  LIBGO_IS_HURD_TRUE='#'
+  LIBGO_IS_HURD_FALSE=
+fi
+
  if test $is_darwin = yes -o $is_dragonfly = yes -o $is_freebsd = yes -o $is_netbsd = yes -o $is_openbsd = yes; then
   LIBGO_IS_BSD_TRUE=
   LIBGO_IS_BSD_FALSE='#'
@@ -15852,6 +15864,10 @@ if test -z "${LIBGO_IS_AIX_TRUE}" && test -z "${LIBGO_IS_AIX_FALSE}"; then
   as_fn_error $? "conditional \"LIBGO_IS_AIX\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${LIBGO_IS_HURD_TRUE}" && test -z "${LIBGO_IS_HURD_FALSE}"; then
+  as_fn_error $? "conditional \"LIBGO_IS_HURD\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${LIBGO_IS_BSD_TRUE}" && test -z "${LIBGO_IS_BSD_FALSE}"; then
   as_fn_error $? "conditional \"LIBGO_IS_BSD\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
diff --git a/libgo/configure.ac b/libgo/configure.ac
index 2b452ec9de8..44b59482c53 100644
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -165,6 +165,7 @@ is_dragonfly=no
 is_rtems=no
 is_solaris=no
 is_aix=no
+is_hurd=no
 GOOS=unknown
 case ${host} in
   *-*-darwin*)   is_darwin=yes;  GOOS=darwin ;;
@@ -177,6 +178,7 @@ case ${host} in
   *-*-rtems*)    is_rtems=yes;   GOOS=rtems ;;
   *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
   *-*-aix*)      is_aix=yes;     GOOS=aix ;;
+  *-*-gnu*)      is_hurd=yes;    GOOS=hurd ;;
 esac
 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
@@ -188,6 +190,7 @@ AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
+AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
 AM_CONDITIONAL(LIBGO_IS_BSD, test $is_darwin = yes -o $is_dragonfly = yes -o $is_freebsd = yes -o $is_netbsd = yes -o $is_openbsd = yes)
 AC_SUBST(GOOS)
 AC_SUBST(ALLGOOS)
diff --git a/libgo/mksigtab.sh b/libgo/mksigtab.sh
index c68b28be3af..11e4ec436bd 100644
--- a/libgo/mksigtab.sh
+++ b/libgo/mksigtab.sh
@@ -91,6 +91,7 @@ checksig _SIGCANCEL  '{_SigSetStack + _SigUnblock, "SIGCANCEL: reserved signal f
 checksig _SIGXRES    '{_SigNotify, "SIGXRES: resource control exceeded"}'
 checksig _SIGJVM1    '{_SigNotify, "SIGJVM1: reserved signal for Java Virtual Machine"}'
 checksig _SIGJVM2    '{_SigNotify, "SIGJVM2: reserved signal for Java Virtual Machine"}'
+checksig _SIGLOST '   {_SigNotify, "SIGLOST: resource lost (Sun); server died (GNU)"}'
 
 # Special handling of signals 32 and 33 on GNU/Linux systems,
 # because they are special to glibc.
@@ -112,6 +113,11 @@ else
 	    rtmax=`grep 'const _*SIGRTMAX = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
 	    if test -n "$rtmax"; then
 		nsig=`expr $rtmax + 1`
+	    elif grep 'const _*SIGRTMAX = [ (]*_*SIGRTMIN[ )]*' gen-sysinfo.go >/dev/null 2>&1; then
+		rtmin=`grep 'const _*SIGRTMIN = [0-9]*$' gen-sysinfo.go | sed -e 's/.* = \([0-9]*\)/\1/'`
+		if test -n "$rtmin"; then
+		    nsig=`expr $rtmin + 1`
+		fi
 	    fi
 	fi
     fi
diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
index 02f0b5b82fe..6a58e7633de 100755
--- a/libgo/mksysinfo.sh
+++ b/libgo/mksysinfo.sh
@@ -55,9 +55,13 @@ grep '^type _mld_hdr_t ' gen-sysinfo.go | \
   sed -e 's/_in6_addr/[16]byte/' >> ${OUT}
 
 # The errno constants.  These get type Errno.
-  egrep '#define E[A-Z0-9_]+ ' errno.i | \
+egrep '#define E[A-Z0-9_]+ [0-9E]' errno.i | \
   sed -e 's/^#define \(E[A-Z0-9_]*\) .*$/const \1 = Errno(_\1)/' >> ${OUT}
 
+# Workaround for GNU/Hurd _EMIG_* errors having negative values
+egrep '#define E[A-Z0-9_]+ -[0-9]' errno.i | \
+  sed -e 's/^#define \(E[A-Z0-9_]*\) .*$/const \1 = Errno(-_\1)/' >> ${OUT}
+
 # The O_xxx flags.
 egrep '^const _(O|F|FD)_' gen-sysinfo.go | \
   sed -e 's/^\(const \)_\([^= ]*\)\(.*\)$/\1\2 = _\2/' >> ${OUT}
@@ -130,6 +134,11 @@ grep '^const _SYS_' gen-sysinfo.go | \
     echo "const $sup = _$sys" >> ${OUT}
   done
 
+# Special treatment of SYS_IOCTL for GNU/Hurd.
+if ! grep '^const SYS_IOCTL' ${OUT} > /dev/null 2>&1; then
+  echo "const SYS_IOCTL = 0" >> ${OUT}
+fi
+
 # The GNU/Linux support wants to use SYS_GETDENTS64 if available.
 if ! grep '^const SYS_GETDENTS ' ${OUT} >/dev/null 2>&1; then
   echo "const SYS_GETDENTS = 0" >> ${OUT}
@@ -475,6 +484,13 @@ grep '^type _st_timespec ' gen-sysinfo.go | \
       -e 's/tv_sec/Sec/' \
       -e 's/tv_nsec/Nsec/' >> ${OUT}
 
+# Special treatment of struct stat st_dev for GNU/Hurd
+# /usr/include/i386-gnu/bits/stat.h: #define st_dev st_fsid
+fsid_to_dev=
+if grep 'define st_dev st_fsid' gen-sysinfo.go > /dev/null 2>&1; then
+  fsid_to_dev="-e 's/st_fsid/Dev/'"
+fi
+
 # The stat type.
 # Prefer largefile variant if available.
 stat=`grep '^type _stat64 ' gen-sysinfo.go || true`
@@ -485,6 +501,7 @@ else
 fi | sed -e 's/type _stat64/type Stat_t/' \
          -e 's/type _stat/type Stat_t/' \
          -e 's/st_dev/Dev/' \
+         ${fsid_to_dev} \
          -e 's/st_ino/Ino/g' \
          -e 's/st_nlink/Nlink/' \
          -e 's/st_mode/Mode/' \