Implement filesystem::canonical() without realpath

	PR libstdc++/67173
	* acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check _XOPEN_VERSION
	and PATH_MAX for _GLIBCXX_USE_REALPATH.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* src/filesystem/ops.cc: (canonical) [!_GLIBCXX_USE_REALPATH]: Add
	alternative implementation.
	* testsuite/experimental/filesystem/operations/canonical.cc: New.
	* testsuite/experimental/filesystem/operations/exists.cc: Add more
	tests.
	* testsuite/experimental/filesystem/operations/absolute.cc: Add test
	variables.
	* testsuite/experimental/filesystem/operations/copy.cc: Likewise.
	* testsuite/experimental/filesystem/operations/current_path.cc:
	Likewise.
	* testsuite/experimental/filesystem/operations/file_size.cc: Likewise.
	* testsuite/experimental/filesystem/operations/status.cc: Likewise.
	* testsuite/experimental/filesystem/operations/temp_directory_path.cc:
	Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@227836 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/experimental/filesystem/operations/current_path.cc b/libstdc++-v3/testsuite/experimental/filesystem/operations/current_path.cc
index c242ac0e3996..81ade73ab569 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/operations/current_path.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/operations/current_path.cc
@@ -29,6 +29,8 @@ namespace fs = std::experimental::filesystem;
 void
 test01()
 {
+  bool test __attribute__((unused)) = false;
+
   fs::path dot(".");
   fs::path cwd = fs::current_path();
   std::error_code ec;
@@ -39,6 +41,8 @@ test01()
 void
 test02()
 {
+  bool test __attribute__((unused)) = false;
+
   auto oldwd = fs::current_path();
   auto tmpdir = fs::temp_directory_path();
   current_path(tmpdir);