testsuite: Move C++ tests in gdc.test into own subdirectory.

Tests have been moved into runnable_cxx as part of upstream dmd 3e10e2dd2.

The extra flags required for tests that mix C++ and D are now limited to
only a small subset of tests, rather than applied to all tests across
gdc.dg and gdc.test.

Reviewed-on: https://github.com/dlang/dmd/pull/10980

gcc/testsuite/ChangeLog:

	* gdc.test/runnable_cxx/runnable_cxx.exp: New file.
	* lib/gdc-utils.exp (gdc-do-test): Add case for runnable_cxx.
	* lib/gdc.exp (gdc_include_flags): Only add flags for libstdc++-v3 if
	GDC_INCLUDE_CXX_FLAGS is true.
	(gdc_link_flags): Likewise.
	(gdc_init): Move setting of default gdc test flags to...
	(gdc_target_compile): ...here.

11 files changed, 46 insertions, 0 deletions

diff --git a/gcc/testsuite/gdc.test/runnable/cabi1.d b/gcc/testsuite/gdc.test/runnable_cxx/cabi1.d
index 3a914cd..3a914cd 100644
--- a/gcc/testsuite/gdc.test/runnable/cabi1.d
+++ b/gcc/testsuite/gdc.test/runnable_cxx/cabi1.d
diff --git a/gcc/testsuite/gdc.test/runnable/cpp_abi_tests.d b/gcc/testsuite/gdc.test/runnable_cxx/cpp_abi_tests.d
index 83e1cff..83e1cff 100644
--- a/gcc/testsuite/gdc.test/runnable/cpp_abi_tests.d
+++ b/gcc/testsuite/gdc.test/runnable_cxx/cpp_abi_tests.d
diff --git a/gcc/testsuite/gdc.test/runnable/cppa.d b/gcc/testsuite/gdc.test/runnable_cxx/cppa.d
index b9b4832..b9b4832 100644
--- a/gcc/testsuite/gdc.test/runnable/cppa.d
+++ b/gcc/testsuite/gdc.test/runnable_cxx/cppa.d
diff --git a/gcc/testsuite/gdc.test/runnable/externmangle.d b/gcc/testsuite/gdc.test/runnable_cxx/externmangle.d
index 9099f94..9099f94 100644
--- a/gcc/testsuite/gdc.test/runnable/externmangle.d
+++ b/gcc/testsuite/gdc.test/runnable_cxx/externmangle.d
diff --git a/gcc/testsuite/gdc.test/runnable/externmangle2.d b/gcc/testsuite/gdc.test/runnable_cxx/externmangle2.d
index 74beb25..74beb25 100644
--- a/gcc/testsuite/gdc.test/runnable/externmangle2.d
+++ b/gcc/testsuite/gdc.test/runnable_cxx/externmangle2.d
diff --git a/gcc/testsuite/gdc.test/runnable/extra-files/cabi2.cpp b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/cabi2.cpp
index 31e5286..31e5286 100644
--- a/gcc/testsuite/gdc.test/runnable/extra-files/cabi2.cpp
+++ b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/cabi2.cpp
diff --git a/gcc/testsuite/gdc.test/runnable/extra-files/cpp_abi_tests.cpp b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/cpp_abi_tests.cpp
index 63f74a2..63f74a2 100644
--- a/gcc/testsuite/gdc.test/runnable/extra-files/cpp_abi_tests.cpp
+++ b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/cpp_abi_tests.cpp
diff --git a/gcc/testsuite/gdc.test/runnable/extra-files/cppb.cpp b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/cppb.cpp
index 587145c..587145c 100644
--- a/gcc/testsuite/gdc.test/runnable/extra-files/cppb.cpp
+++ b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/cppb.cpp
diff --git a/gcc/testsuite/gdc.test/runnable/extra-files/externmangle.cpp b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/externmangle.cpp
index da3e844..da3e844 100644
--- a/gcc/testsuite/gdc.test/runnable/extra-files/externmangle.cpp
+++ b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/externmangle.cpp
diff --git a/gcc/testsuite/gdc.test/runnable/extra-files/externmangle2.cpp b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/externmangle2.cpp
index b481348..b481348 100644
--- a/gcc/testsuite/gdc.test/runnable/extra-files/externmangle2.cpp
+++ b/gcc/testsuite/gdc.test/runnable_cxx/extra-files/externmangle2.cpp
diff --git a/gcc/testsuite/gdc.test/runnable_cxx/runnable_cxx.exp b/gcc/testsuite/gdc.test/runnable_cxx/runnable_cxx.exp
new file mode 100644
index 0000000..a37376a
--- /dev/null
+++ b/gcc/testsuite/gdc.test/runnable_cxx/runnable_cxx.exp
@@ -0,0 +1,46 @@
+# Copyright (C) 2012-2020 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+# Runnable C++ tests for the D2 testsuite.
+
+# Load support procs.
+load_lib gdc-dg.exp
+load_lib gdc-utils.exp
+
+# If the D runtime library is missing, bail.
+if { ![check_effective_target_d_runtime] } {
+    return
+}
+
+# We are mixing D and C++ code, need to pull in libstdc++
+global GDC_INCLUDE_CXX_FLAGS
+set GDC_INCLUDE_CXX_FLAGS 1
+
+# Initialize `dg'.
+dg-init
+
+# Main loop.
+if [check_no_compiler_messages extern_c++_tests assembly {
+   // C++
+   int main() { return 0; }
+}] {
+    gdc-do-test [glob -nocomplain $srcdir/$subdir/*.d]
+}
+
+set GDC_INCLUDE_CXX_FLAGS 0
+
+# All done.
+dg-finish