Add Go frontend, libgo library, and Go testsuite.

gcc/:
	* gcc.c (default_compilers): Add entry for ".go".
	* common.opt: Add -static-libgo as a driver option.
	* doc/install.texi (Configuration): Mention libgo as an option for
	--enable-shared.  Mention go as an option for --enable-languages.
	* doc/invoke.texi (Overall Options): Mention .go as a file name
	suffix.  Mention go as a -x option.
	* doc/frontends.texi (G++ and GCC): Mention Go as a supported
	language.
	* doc/sourcebuild.texi (Top Level): Mention libgo.
	* doc/standards.texi (Standards): Add section on Go language.
	Move references for other languages into their own section.
	* doc/contrib.texi (Contributors): Mention that I contributed the
	Go frontend.
gcc/testsuite/:
	* lib/go.exp: New file.
	* lib/go-dg.exp: New file.
	* lib/go-torture.exp: New file.
	* lib/target-supports.exp (check_compile): Match // Go.

From-SVN: r167407

1 files changed, 173 insertions, 0 deletions

diff --git a/libgo/merge.sh b/libgo/merge.sh
new file mode 100644
index 00000000000..17dc5734024
--- /dev/null
+++ b/libgo/merge.sh
@@ -0,0 +1,173 @@
+#!/bin/sh
+
+# Copyright 2009 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# This script merges changes from the master copy of the Go library
+# into the libgo library.  This does the easy stuff; the hard stuff is
+# left to the user.
+
+# The file MERGE should hold the Mercurial revision number of the last
+# revision which was merged into these sources.  Given that, and given
+# the current sources, we can run the usual diff3 algorithm to merge
+# all changes into our sources.
+
+set -e
+
+TMPDIR=${TMPDIR:-/tmp}
+
+OLDDIR=${TMPDIR}/libgo-merge-old
+NEWDIR=${TMPDIR}/libgo-merge-new
+
+if ! test -f MERGE; then
+  echo 1>&2 "merge.sh: must be run in libgo source directory"
+  exit 1
+fi
+
+if test $# -ne 1; then
+  echo 1>&2 "merge.sh: Usage: merge.sh mercurial-repository"
+  exit 1
+fi
+
+repository=$1
+
+merge_rev=`sed 1q MERGE`
+
+rm -rf ${OLDDIR}
+hg clone -r ${merge_rev} ${repository} ${OLDDIR}
+
+rm -rf ${NEWDIR}
+hg clone ${repository} ${NEWDIR}
+
+new_rev=`cd ${NEWDIR} && hg log | sed 1q | sed -e 's/.*://'`
+
+merge() {
+  name=$1
+  old=$2
+  new=$3
+  libgo=$4
+  if ! test -f ${new}; then
+    # The file does not exist in the new version.
+    if ! test -f ${old}; then
+      echo 1>&2 "merge.sh internal error no files $old $new"
+      exit 1
+    fi
+    if ! test -f ${libgo}; then
+      # File removed in new version and libgo.
+      :;
+    else
+      echo "merge.sh: ${name}: REMOVED"
+      rm -f ${libgo}
+      hg rm ${libgo}
+    fi
+  elif test -f ${old}; then
+    # The file exists in the old version.
+    if ! test -f ${libgo}; then
+      echo "merge.sh: $name: skipping: exists in old and new hg, but not in libgo"
+      continue
+    fi
+    if cmp -s ${old} ${libgo}; then
+      # The libgo file is unchanged from the old version.
+      if cmp -s ${new} ${libgo}; then
+        # File is unchanged from old to new version.
+        continue
+      fi
+      # Update file in libgo.
+      echo "merge.sh: $name: updating"
+      cp ${new} ${libgo}
+    else
+      # The libgo file has local changes.
+      set +e
+      diff3 -m -E ${libgo} ${old} ${new} > ${libgo}.tmp
+      status=$?
+      set -e
+      case $status in
+      0)
+        echo "merge.sh: $name: updating"
+        mv ${libgo}.tmp ${libgo}
+        ;;
+      1)
+        echo "merge.sh: $name: CONFLICTS"
+        mv ${libgo}.tmp ${libgo}
+        hg resolve -u ${libgo}
+        ;;
+      *)
+        echo 1>&2 "merge.sh: $name: diff3 failure"
+        exit 1
+        ;;
+      esac
+    fi
+  else
+    # The file does not exist in the old version.
+    if test -f ${libgo}; then
+      if ! cmp -s ${new} ${libgo}; then
+        echo 1>&2 "merge.sh: $name: IN NEW AND LIBGO BUT NOT OLD"
+      fi
+    else
+      echo "merge.sh: $name: NEW"
+      dir=`dirname ${libgo}`
+      if ! test -d ${dir}; then
+        mkdir -p ${dir}
+      fi
+      cp ${new} ${libgo}
+      hg add ${libgo}
+    fi
+  fi
+}
+
+(cd ${NEWDIR}/src/pkg && find . -name '*.go' -print) | while read f; do
+  if test `dirname $f` = "./syscall"; then
+    continue
+  fi
+  oldfile=${OLDDIR}/src/pkg/$f
+  newfile=${NEWDIR}/src/pkg/$f
+  libgofile=go/$f
+  merge $f ${oldfile} ${newfile} ${libgofile}
+done
+
+(cd ${NEWDIR}/src/pkg && find . -name testdata -print) | while read d; do
+  oldtd=${OLDDIR}/src/pkg/$d
+  newtd=${NEWDIR}/src/pkg/$d
+  libgotd=go/$d
+  if ! test -d ${oldtd}; then
+    continue
+  fi
+  (cd ${oldtd} && hg status -A .) | while read f; do
+    if test "`basename $f`" = ".hgignore"; then
+      continue
+    fi
+    f=`echo $f | sed -e 's/^..//'`
+    name=$d/$f
+    oldfile=${oldtd}/$f
+    newfile=${newtd}/$f
+    libgofile=${libgotd}/$f
+    merge ${name} ${oldfile} ${newfile} ${libgofile}
+  done
+done
+
+runtime="goc2c.c mcache.c mcentral.c mfinal.c mfixalloc.c mgc0.c mheap.c mheapmap32.c mheapmap64.c msize.c malloc.h mheapmap32.h mheapmap64.h malloc.goc mprof.goc"
+for f in $runtime; do
+  oldfile=${OLDDIR}/src/pkg/runtime/$f
+  newfile=${NEWDIR}/src/pkg/runtime/$f
+  libgofile=runtime/$f
+  merge $f ${oldfile} ${newfile} ${libgofile}
+done
+
+(cd ${OLDDIR}/src/pkg && find . -name '*.go' -print) | while read f; do
+  oldfile=${OLDDIR}/src/pkg/$f
+  newfile=${NEWDIR}/src/pkg/$f
+  libgofile=go/$f
+  if test -f ${newfile}; then
+    continue
+  fi
+  if ! test -f ${libgofile}; then
+    continue
+  fi
+  echo "merge.sh: ${libgofile}: REMOVED"
+  rm -f ${libgofile}
+  hg rm ${libgofile}
+done
+
+(echo ${new_rev}; sed -ne '2,$p' MERGE) > MERGE.tmp
+mv MERGE.tmp MERGE