Introduce selftest::locate_file

gcc/ChangeLog:
	* Makefile.in (SELFTEST_FLAGS): Add path argument to -fself-test.
	(s-selftest): Add dependency on the selftests data directory.
	* common.opt (fself-test): Rename to...
	(fself-test=): ...this, documenting the meaning of the argument.
	* selftest-run-tests.c (along): Likewise.
	* selftest-run-tests.c: Include "options.h".
	(selftest::run_tests): Initialize selftest::path_to_selftest_files
	from flag_self_test.
	* selftest.c (selftest::path_to_selftest_files): New global.
	(selftest::locate_file): New function.
	(selftest::test_locate_file): New function.
	(selftest_c_tests): Likewise.
	(selftest::selftest_c_tests): Call test_locate_file.
	* selftest.h (selftest::locate_file): New decl.
	(selftest::path_to_selftest_files): New decl.

gcc/testsuite/ChangeLog:
	PR target/78213
	* gcc.dg/cpp/pr71591.c: Add a fake value for the argument of
	-fself-test.
	* gcc.dg/pr78213.c: Disable this test.
	* selftests/example.txt: New file.

From-SVN: r243681

1 files changed, 28 insertions, 0 deletions

diff --git a/gcc/selftest.c b/gcc/selftest.c
index 40c6cb5..3ff3b3d 100644
--- a/gcc/selftest.c
+++ b/gcc/selftest.c
@@ -198,6 +198,21 @@ read_file (const location &loc, const char *path)
   return result;
 }
 
+/* The path of SRCDIR/testsuite/selftests.  */
+
+const char *path_to_selftest_files = NULL;
+
+/* Convert a path relative to SRCDIR/testsuite/selftests
+   to a real path (either absolute, or relative to pwd).
+   The result should be freed by the caller.  */
+
+char *
+locate_file (const char *name)
+{
+  ASSERT_NE (NULL, path_to_selftest_files);
+  return concat (path_to_selftest_files, "/", name, NULL);
+}
+
 /* Selftests for libiberty.  */
 
 /* Verify that xstrndup generates EXPECTED when called on SRC and N.  */
@@ -281,6 +296,18 @@ test_read_file ()
   free (buf);
 }
 
+/* Verify locate_file (and read_file).  */
+
+static void
+test_locate_file ()
+{
+  char *path = locate_file ("example.txt");
+  char *buf = read_file (SELFTEST_LOCATION, path);
+  ASSERT_STREQ ("example of a selftest file\n", buf);
+  free (buf);
+  free (path);
+}
+
 /* Run all of the selftests within this file.  */
 
 void
@@ -290,6 +317,7 @@ selftest_c_tests ()
   test_assertions ();
   test_named_temp_file ();
   test_read_file ();
+  test_locate_file ();
 }
 
 } // namespace selftest