[OPENMP] Make -fopenmp to turn on OpenMP support by default.

Patch turns on OpenMP support in clang by default after fixing OpenMP buildbots.
Differential Revision: http://reviews.llvm.org/D13802


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255222 91177308-0d34-0410-b5e6-96231b3b80d8

autoconf/configure.ac

@@ -1343,7 +1343,7 @@ AC_DEFINE_UNQUOTED(DEFAULT_SYSROOT,"$withval",
 AC_ARG_WITH(clang-default-openmp-runtime,
   AS_HELP_STRING([--with-clang-default-openmp-runtime],
     [The default OpenMP runtime for Clang.]),,
-    withval="libgomp")
+    withval="libomp")
 AC_DEFINE_UNQUOTED(CLANG_DEFAULT_OPENMP_RUNTIME,"$withval",
                    [Default OpenMP runtime used by -fopenmp.])
 

configure

@@ -5954,7 +5954,7 @@ _ACEOF
 if test "${with_clang_default_openmp_runtime+set}" = set; then
   withval=$with_clang_default_openmp_runtime;
 else
-  withval="libgomp"
+  withval="libomp"
 fi
 
 

docs/GettingStarted.rst

@@ -55,6 +55,12 @@ Here's the short story for getting up and running quickly with LLVM:
    * ``cd llvm/projects``
    * ``svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt``
 
+#. Checkout Libomp (required for OpenMP support):
+
+   * ``cd where-you-want-llvm-to-live``
+   * ``cd llvm/projects``
+   * ``svn co http://llvm.org/svn/llvm-project/openmp/trunk openmp``
+
 #. Checkout libcxx and libcxxabi **[Optional]**:
 
    * ``cd where-you-want-llvm-to-live``
@@ -535,6 +541,13 @@ If you want to check out compiler-rt (required to build the sanitizers), run:
   % cd llvm/projects
   % git clone http://llvm.org/git/compiler-rt.git
 
+If you want to check out libomp (required for OpenMP support), run:
+
+.. code-block:: console
+
+  % cd llvm/projects
+  % git clone http://llvm.org/git/openmp.git
+
 If you want to check out libcxx and libcxxabi (optional), run:
 
 .. code-block:: console
@@ -634,7 +647,7 @@ To set up clone from which you can submit code using ``git-svn``, run:
   % git config svn-remote.svn.fetch :refs/remotes/origin/master
   % git svn rebase -l
 
-Likewise for compiler-rt and test-suite.
+Likewise for compiler-rt, libomp and test-suite.
 
 To update this clone without generating git-svn tags that conflict with the
 upstream Git repo, run:
@@ -648,7 +661,7 @@ upstream Git repo, run:
      git checkout master &&
      git svn rebase -l)
 
-Likewise for compiler-rt and test-suite.
+Likewise for compiler-rt, libomp and test-suite.
 
 This leaves your working directories on their master branches, so you'll need to
 ``checkout`` each working branch individually and ``rebase`` it on top of its

docs/ReleaseProcess.rst

@@ -53,7 +53,7 @@ test-release.sh
 ---------------
 
 This script will check-out, configure and compile LLVM+Clang (+ most add-ons, like ``compiler-rt``,
-``libcxx`` and ``clang-extra-tools``) in three stages, and will test the final stage.
+``libcxx``, ``libomp`` and ``clang-extra-tools``) in three stages, and will test the final stage.
 It'll have installed the final binaries on the Phase3/Releasei(+Asserts) directory, and
 that's the one you should use for the test-suite and other external tests.
 

utils/release/test-release.sh

@@ -34,7 +34,7 @@ do_rt="yes"
 do_libs="yes"
 do_libunwind="yes"
 do_test_suite="yes"
-do_openmp="no"
+do_openmp="yes"
 BuildDir="`pwd`"
 use_autoconf="no"
 ExtraConfigureFlags=""
@@ -62,7 +62,7 @@ function usage() {
     echo " -no-libs             Disable check-out & build libcxx/libcxxabi/libunwind"
     echo " -no-libunwind        Disable check-out & build libunwind"
     echo " -no-test-suite       Disable check-out & build test-suite"
-    echo " -openmp              Check out and build the OpenMP run-time (experimental)"
+    echo " -no-openmp           Disable check-out & build libomp"
 }
 
 if [ `uname -s` = "Darwin" ]; then
@@ -143,8 +143,8 @@ while [ $# -gt 0 ]; do
         -no-test-suite )
             do_test_suite="no"
             ;;
-        -openmp )
-            do_openmp="yes"
+        -no-openmp )
+            do_openmp="no"
             ;;
         -help | --help | -h | --h | -\? )
             usage
@@ -293,6 +293,9 @@ function export_sources() {
     if [ -d $BuildDir/compiler-rt.src ] && [ ! -h compiler-rt ]; then
         ln -s ../../compiler-rt.src compiler-rt
     fi
+    if [ -d $BuildDir/openmp.src ] && [ ! -h openmp ]; then
+        ln -s ../../openmp.src openmp
+    fi
     if [ -d $BuildDir/libcxx.src ] && [ ! -h libcxx ]; then
         ln -s ../../libcxx.src libcxx
     fi
@@ -443,46 +446,6 @@ function package_release() {
     cd $cwd
 }
 
-# Build and package the OpenMP run-time. This is still experimental and not
-# meant for official testing in the release, but as a way for providing
-# binaries as a convenience to those who want to try it out.
-function build_OpenMP() {
-    cwd=`pwd`
-
-    rm -rf $BuildDir/Phase3/openmp
-    rm -rf $BuildDir/Phase3/openmp.install
-    mkdir -p $BuildDir/Phase3/openmp
-    cd $BuildDir/Phase3/openmp
-    clang=$BuildDir/Phase3/Release/llvmCore-$Release-$RC.install/usr/local/bin/clang
-
-    echo "#" cmake -DCMAKE_C_COMPILER=${clang} -DCMAKE_CXX_COMPILER=${clang}++ \
-            -DCMAKE_BUILD_TYPE=Release -DLIBOMP_MICRO_TESTS=on \
-            $BuildDir/openmp.src/runtime
-    cmake -DCMAKE_C_COMPILER=${clang} -DCMAKE_CXX_COMPILER=${clang}++ \
-            -DCMAKE_BUILD_TYPE=Release -DLIBOMP_MICRO_TESTS=on \
-            $BuildDir/openmp.src/runtime
-
-    echo "# Building OpenMP run-time"
-    echo "# ${MAKE} -j $NumJobs VERBOSE=1"
-    ${MAKE} -j $NumJobs VERBOSE=1
-    echo "# ${MAKE} libomp-micro-tests VERBOSE=1"
-    ${MAKE} libomp-micro-tests VERBOSE=1
-    echo "# ${MAKE} install DESTDIR=$BuildDir/Phase3/openmp.install"
-    ${MAKE} install DESTDIR=$BuildDir/Phase3/openmp.install
-
-    OpenMPPackage=OpenMP-$Release
-    if [ $RC != "final" ]; then
-        OpenMPPackage=$OpenMPPackage-$RC
-    fi
-    OpenMPPackage=$OpenMPPackage-$Triple
-
-    mv $BuildDir/Phase3/openmp.install/usr/local $BuildDir/$OpenMPPackage
-    cd $BuildDir
-    tar cvfJ $BuildDir/$OpenMPPackage.tar.xz $OpenMPPackage
-    mv $OpenMPPackage $BuildDir/Phase3/openmp.install/usr/local
-    cd $cwd
-}
-
 # Exit if any command fails
 # Note: pipefail is necessary for running build commands through
 # a pipe (i.e. it changes the output of ``false | tee /dev/null ; echo $?``)
@@ -594,10 +557,6 @@ for Flavor in $Flavors ; do
     fi
 done
 
-if [ $do_openmp = "yes" ]; then
-  build_OpenMP
-fi
-
 ) 2>&1 | tee $LogDir/testing.$Release-$RC.log
 
 package_release