From ba80ee730758edc4f8bb221956d93e1b913de8a7 Mon Sep 17 00:00:00 2001
From: Chandler Carruth <chandlerc@gmail.com>
Date: Thu, 28 May 2015 01:47:22 +0000
Subject: [omp] Add a configuration variable for the default OpenMP runtime.

This will be used in my next commit to Clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238388 91177308-0d34-0410-b5e6-96231b3b80d8
---
 autoconf/configure.ac           |  7 +++++++
 configure                       | 16 ++++++++++++++++
 include/llvm/Config/config.h.in |  3 +++
 3 files changed, 26 insertions(+)

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 586f3f26cb3..5ca40ec373b 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1337,6 +1337,13 @@ AC_ARG_WITH(default-sysroot,
 AC_DEFINE_UNQUOTED(DEFAULT_SYSROOT,"$withval",
                    [Default <path> to all compiler invocations for --sysroot=<path>.])
 
+AC_ARG_WITH(clang-default-openmp-runtime,
+  AS_HELP_STRING([--with-clang-default-openmp-runtime],
+    [The default OpenMP runtime for Clang.]),,
+    withval="")
+AC_DEFINE_UNQUOTED(CLANG_DEFAULT_OPENMP_RUNTIME,"$withval",
+                   [Default OpenMP runtime used by -fopenmp.])
+
 dnl Allow linking of LLVM with GPLv3 binutils code.
 AC_ARG_WITH(binutils-include,
   AS_HELP_STRING([--with-binutils-include],
diff --git a/configure b/configure
index 37f3d7d95ae..b3ccccbb881 100755
--- a/configure
+++ b/configure
@@ -1495,6 +1495,8 @@ Optional Packages:
                           search for headers
   --with-gcc-toolchain    Directory where gcc is installed.
   --with-default-sysroot  Add --sysroot=<path> to all compiler invocations.
+  --with-clang-default-openmp-runtime
+                          The default OpenMP runtime for Clang.
   --with-binutils-include Specify path to binutils/include/ containing
                           plugin-api.h file for gold plugin.
   --with-bug-report-url   Specify the URL where bug reports should be
@@ -5948,6 +5950,20 @@ _ACEOF
 
 
 
+# Check whether --with-clang-default-openmp-runtime was given.
+if test "${with_clang_default_openmp_runtime+set}" = set; then
+  withval=$with_clang_default_openmp_runtime;
+else
+  withval=""
+fi
+
+
+cat >>confdefs.h <<_ACEOF
+#define CLANG_DEFAULT_OPENMP_RUNTIME "$withval"
+_ACEOF
+
+
+
 # Check whether --with-binutils-include was given.
 if test "${with_binutils_include+set}" = set; then
   withval=$with_binutils_include;
diff --git a/include/llvm/Config/config.h.in b/include/llvm/Config/config.h.in
index 67d7c8485a4..211e1d0fad0 100644
--- a/include/llvm/Config/config.h.in
+++ b/include/llvm/Config/config.h.in
@@ -6,6 +6,9 @@
 /* Bug report URL. */
 #undef BUG_REPORT_URL
 
+/* Default OpenMP runtime used by -fopenmp. */
+#undef CLANG_DEFAULT_OPENMP_RUNTIME
+
 /* Define if we have libxml2 */
 #undef CLANG_HAVE_LIBXML
 
-- 
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