libphobos: Add --with-libphobos-druntime-only option.

The intended purpose of the option is both for targets that don't
support phobos yet, and for gdc itself to support bootstrapping itself
as a self-hosted D compiler.

The libphobos testsuite has been updated to only add libphobos to the
search paths if it's being built.  A new D2 testsuite directive
RUNNABLE_PHOBOS_TEST has also been patched in to disable some runnable
tests that have phobos dependencies, of which is a temporary measure
until upstream DMD fixes or removes these tests entirely.

gcc/testsuite/ChangeLog:

	* lib/gdc-utils.exp (gdc-convert-test): Add dg-skip-if for tests that
	depending on the phobos standard library.

libphobos/ChangeLog:

	* configure: Regenerate.
	* configure.ac: Add --with-libphobos-druntime-only option and the
	conditional ENABLE_LIBDRUNTIME_ONLY.
	* configure.tgt: Define LIBDRUNTIME_ONLY.
	* src/Makefile.am: Add phobos sources if not ENABLE_LIBDRUNTIME_ONLY.
	* src/Makefile.in: Regenerate.
	* testsuite/testsuite_flags.in: Add phobos path if compiling phobos.

52 files changed, 60 insertions, 0 deletions

diff --git a/gcc/testsuite/gdc.test/runnable/builtin.d b/gcc/testsuite/gdc.test/runnable/builtin.d
index 205e792..d7ac356 100644
--- a/gcc/testsuite/gdc.test/runnable/builtin.d
+++ b/gcc/testsuite/gdc.test/runnable/builtin.d
@@ -116,3 +116,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/complex.d b/gcc/testsuite/gdc.test/runnable/complex.d
index e9c79cb..49bb309 100644
--- a/gcc/testsuite/gdc.test/runnable/complex.d
+++ b/gcc/testsuite/gdc.test/runnable/complex.d
@@ -460,3 +460,4 @@ int main(char[][] args)
     return 0;
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/constfold.d b/gcc/testsuite/gdc.test/runnable/constfold.d
index 0708056..d56f6c1 100644
--- a/gcc/testsuite/gdc.test/runnable/constfold.d
+++ b/gcc/testsuite/gdc.test/runnable/constfold.d
@@ -672,3 +672,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/foreach4.d b/gcc/testsuite/gdc.test/runnable/foreach4.d
index 32ac466..bf8eab4 100644
--- a/gcc/testsuite/gdc.test/runnable/foreach4.d
+++ b/gcc/testsuite/gdc.test/runnable/foreach4.d
@@ -928,3 +928,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/ifti.d b/gcc/testsuite/gdc.test/runnable/ifti.d
index 9ea97a2..0e4edef 100644
--- a/gcc/testsuite/gdc.test/runnable/ifti.d
+++ b/gcc/testsuite/gdc.test/runnable/ifti.d
@@ -118,3 +118,4 @@ void main() {
     }
 
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/implicit.d b/gcc/testsuite/gdc.test/runnable/implicit.d
index bc3f626..89e6ac1 100644
--- a/gcc/testsuite/gdc.test/runnable/implicit.d
+++ b/gcc/testsuite/gdc.test/runnable/implicit.d
@@ -479,3 +479,4 @@ void main()
 
     writefln("Success");
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/inner.d b/gcc/testsuite/gdc.test/runnable/inner.d
index 592aaca..40eb27d 100644
--- a/gcc/testsuite/gdc.test/runnable/inner.d
+++ b/gcc/testsuite/gdc.test/runnable/inner.d
@@ -916,3 +916,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/interpret.d b/gcc/testsuite/gdc.test/runnable/interpret.d
index 1dc9023..eee3930 100644
--- a/gcc/testsuite/gdc.test/runnable/interpret.d
+++ b/gcc/testsuite/gdc.test/runnable/interpret.d
@@ -3609,3 +3609,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/issue8671.d b/gcc/testsuite/gdc.test/runnable/issue8671.d
index f9fa013..8097e79 100644
--- a/gcc/testsuite/gdc.test/runnable/issue8671.d
+++ b/gcc/testsuite/gdc.test/runnable/issue8671.d
@@ -3,3 +3,4 @@ void main()
 {
     double t = 1.0 - uniform(0.0, 1.0);
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/lazy.d b/gcc/testsuite/gdc.test/runnable/lazy.d
index 2fea546..741877c 100644
--- a/gcc/testsuite/gdc.test/runnable/lazy.d
+++ b/gcc/testsuite/gdc.test/runnable/lazy.d
@@ -308,3 +308,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/mars1.d b/gcc/testsuite/gdc.test/runnable/mars1.d
index 91d93db..b240745 100644
--- a/gcc/testsuite/gdc.test/runnable/mars1.d
+++ b/gcc/testsuite/gdc.test/runnable/mars1.d
@@ -1723,3 +1723,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/mixin1.d b/gcc/testsuite/gdc.test/runnable/mixin1.d
index 5332ebb..c16d943 100644
--- a/gcc/testsuite/gdc.test/runnable/mixin1.d
+++ b/gcc/testsuite/gdc.test/runnable/mixin1.d
@@ -1468,3 +1468,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/mixin2.d b/gcc/testsuite/gdc.test/runnable/mixin2.d
index 245e71c..53a64d5 100644
--- a/gcc/testsuite/gdc.test/runnable/mixin2.d
+++ b/gcc/testsuite/gdc.test/runnable/mixin2.d
@@ -361,3 +361,4 @@ void main()
 
     writeln("Success");
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/s2ir.d b/gcc/testsuite/gdc.test/runnable/s2ir.d
index ca832d2..4c969b4 100644
--- a/gcc/testsuite/gdc.test/runnable/s2ir.d
+++ b/gcc/testsuite/gdc.test/runnable/s2ir.d
@@ -95,3 +95,4 @@ int main()
     writefln("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/stress.d b/gcc/testsuite/gdc.test/runnable/stress.d
index 2c7afe0..1b7f645 100644
--- a/gcc/testsuite/gdc.test/runnable/stress.d
+++ b/gcc/testsuite/gdc.test/runnable/stress.d
@@ -725,3 +725,4 @@ void CLASS()
         }
     }
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/template4.d b/gcc/testsuite/gdc.test/runnable/template4.d
index ab082d9..84792da 100644
--- a/gcc/testsuite/gdc.test/runnable/template4.d
+++ b/gcc/testsuite/gdc.test/runnable/template4.d
@@ -1164,3 +1164,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/template9.d b/gcc/testsuite/gdc.test/runnable/template9.d
index 0f1309f..0b11c6b 100644
--- a/gcc/testsuite/gdc.test/runnable/template9.d
+++ b/gcc/testsuite/gdc.test/runnable/template9.d
@@ -4965,3 +4965,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test10942.d b/gcc/testsuite/gdc.test/runnable/test10942.d
index f85b4c9..612158f 100644
--- a/gcc/testsuite/gdc.test/runnable/test10942.d
+++ b/gcc/testsuite/gdc.test/runnable/test10942.d
@@ -24,3 +24,4 @@ mixin(getEnum(1087));
 
 void main() { }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test11.d b/gcc/testsuite/gdc.test/runnable/test11.d
index 5b21ba0..e62ea97 100644
--- a/gcc/testsuite/gdc.test/runnable/test11.d
+++ b/gcc/testsuite/gdc.test/runnable/test11.d
@@ -1390,3 +1390,4 @@ int main(string[] argv)
 }
 
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test12.d b/gcc/testsuite/gdc.test/runnable/test12.d
index 2b1fb0e..c196361 100644
--- a/gcc/testsuite/gdc.test/runnable/test12.d
+++ b/gcc/testsuite/gdc.test/runnable/test12.d
@@ -1250,3 +1250,4 @@ int main(string[] argv)
     return 0;
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test12197.d b/gcc/testsuite/gdc.test/runnable/test12197.d
index 51dc36c..52d44c9 100644
--- a/gcc/testsuite/gdc.test/runnable/test12197.d
+++ b/gcc/testsuite/gdc.test/runnable/test12197.d
@@ -10,3 +10,4 @@ void main()
     foo(a);
     assert(a[0] == 10000);
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test15.d b/gcc/testsuite/gdc.test/runnable/test15.d
index d8bb3ae..75cd11e 100644
--- a/gcc/testsuite/gdc.test/runnable/test15.d
+++ b/gcc/testsuite/gdc.test/runnable/test15.d
@@ -1439,3 +1439,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test22.d b/gcc/testsuite/gdc.test/runnable/test22.d
index e2d26e7..d15db1d 100644
--- a/gcc/testsuite/gdc.test/runnable/test22.d
+++ b/gcc/testsuite/gdc.test/runnable/test22.d
@@ -1306,3 +1306,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test23.d b/gcc/testsuite/gdc.test/runnable/test23.d
index f43f6a4..dda2864 100644
--- a/gcc/testsuite/gdc.test/runnable/test23.d
+++ b/gcc/testsuite/gdc.test/runnable/test23.d
@@ -1566,3 +1566,4 @@ void main()
 
     printf("Success\n");
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test24.d b/gcc/testsuite/gdc.test/runnable/test24.d
index 78e9150..cc6d668 100644
--- a/gcc/testsuite/gdc.test/runnable/test24.d
+++ b/gcc/testsuite/gdc.test/runnable/test24.d
@@ -8,3 +8,4 @@ void main()
 {
     string hi = std.string.format("%s", 3);
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test27.d b/gcc/testsuite/gdc.test/runnable/test27.d
index b45c132..3e5a462 100644
--- a/gcc/testsuite/gdc.test/runnable/test27.d
+++ b/gcc/testsuite/gdc.test/runnable/test27.d
@@ -11,3 +11,4 @@ int main()
     return 0;
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test28.d b/gcc/testsuite/gdc.test/runnable/test28.d
index c7ec6ad..1f7e7e8 100644
--- a/gcc/testsuite/gdc.test/runnable/test28.d
+++ b/gcc/testsuite/gdc.test/runnable/test28.d
@@ -1318,3 +1318,4 @@ void main()
     printf("Success\n");
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test34.d b/gcc/testsuite/gdc.test/runnable/test34.d
index 5c28d0f..e92f3d6 100644
--- a/gcc/testsuite/gdc.test/runnable/test34.d
+++ b/gcc/testsuite/gdc.test/runnable/test34.d
@@ -1292,3 +1292,4 @@ void main()
 }
 
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test37.d b/gcc/testsuite/gdc.test/runnable/test37.d
index 97448d1..c28d30f 100644
--- a/gcc/testsuite/gdc.test/runnable/test37.d
+++ b/gcc/testsuite/gdc.test/runnable/test37.d
@@ -11,3 +11,4 @@ void main()
     // imports in a subdirectory of the -J path
     writefln(import("std14198/uni.d"));
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test42.d b/gcc/testsuite/gdc.test/runnable/test42.d
index 6e0c42b..2bb0458 100644
--- a/gcc/testsuite/gdc.test/runnable/test42.d
+++ b/gcc/testsuite/gdc.test/runnable/test42.d
@@ -6438,3 +6438,4 @@ int main()
     return 0;
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test5305.d b/gcc/testsuite/gdc.test/runnable/test5305.d
index e1c274d..9102cba 100644
--- a/gcc/testsuite/gdc.test/runnable/test5305.d
+++ b/gcc/testsuite/gdc.test/runnable/test5305.d
@@ -5,3 +5,4 @@ void map(real function(real) f) { }
 int main() { map(&sqrt); return 0; }
 
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/test60.d b/gcc/testsuite/gdc.test/runnable/test60.d
index e55f05c..ab96732 100644
--- a/gcc/testsuite/gdc.test/runnable/test60.d
+++ b/gcc/testsuite/gdc.test/runnable/test60.d
@@ -20,3 +20,4 @@ void main()
 
     writeln("Success");
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testaa.d b/gcc/testsuite/gdc.test/runnable/testaa.d
index d069e79..6e28e89 100644
--- a/gcc/testsuite/gdc.test/runnable/testaa.d
+++ b/gcc/testsuite/gdc.test/runnable/testaa.d
@@ -1383,3 +1383,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testbitarray.d b/gcc/testsuite/gdc.test/runnable/testbitarray.d
index 0204460..118388b 100644
--- a/gcc/testsuite/gdc.test/runnable/testbitarray.d
+++ b/gcc/testsuite/gdc.test/runnable/testbitarray.d
@@ -14,3 +14,4 @@ void main() {
 }
 
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testdstress.d b/gcc/testsuite/gdc.test/runnable/testdstress.d
index ee36d34..097fc31 100644
--- a/gcc/testsuite/gdc.test/runnable/testdstress.d
+++ b/gcc/testsuite/gdc.test/runnable/testdstress.d
@@ -930,3 +930,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testfile.d b/gcc/testsuite/gdc.test/runnable/testfile.d
index 7005900..e7c3e19 100644
--- a/gcc/testsuite/gdc.test/runnable/testfile.d
+++ b/gcc/testsuite/gdc.test/runnable/testfile.d
@@ -22,3 +22,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testformat.d b/gcc/testsuite/gdc.test/runnable/testformat.d
index e209b85..2cb0da9 100644
--- a/gcc/testsuite/gdc.test/runnable/testformat.d
+++ b/gcc/testsuite/gdc.test/runnable/testformat.d
@@ -123,3 +123,4 @@ int main()
     std.stdio.writefln("Success");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testline.d b/gcc/testsuite/gdc.test/runnable/testline.d
index 22117bd..5001fc2 100644
--- a/gcc/testsuite/gdc.test/runnable/testline.d
+++ b/gcc/testsuite/gdc.test/runnable/testline.d
@@ -41,3 +41,4 @@ void checkFileSpec(Object o){
 writeln(str);
         assert(str[start .. start+3]=="(1)");
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testmmfile.d b/gcc/testsuite/gdc.test/runnable/testmmfile.d
index f0b3340..1ae98df 100644
--- a/gcc/testsuite/gdc.test/runnable/testmmfile.d
+++ b/gcc/testsuite/gdc.test/runnable/testmmfile.d
@@ -117,3 +117,4 @@ int main()
 
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testscope2.d b/gcc/testsuite/gdc.test/runnable/testscope2.d
index ae4e3d7..cde02ab 100644
--- a/gcc/testsuite/gdc.test/runnable/testscope2.d
+++ b/gcc/testsuite/gdc.test/runnable/testscope2.d
@@ -246,3 +246,4 @@ void main()
     printf("Success\n");
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testsignals.d b/gcc/testsuite/gdc.test/runnable/testsignals.d
index 619be73..a43f892 100644
--- a/gcc/testsuite/gdc.test/runnable/testsignals.d
+++ b/gcc/testsuite/gdc.test/runnable/testsignals.d
@@ -111,3 +111,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testsocket.d b/gcc/testsuite/gdc.test/runnable/testsocket.d
index 3d153d6..00b757a 100644
--- a/gcc/testsuite/gdc.test/runnable/testsocket.d
+++ b/gcc/testsuite/gdc.test/runnable/testsocket.d
@@ -48,3 +48,4 @@ int main ()
 }
 
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/teststdio.d b/gcc/testsuite/gdc.test/runnable/teststdio.d
index b5cc444..854dcb5 100644
--- a/gcc/testsuite/gdc.test/runnable/teststdio.d
+++ b/gcc/testsuite/gdc.test/runnable/teststdio.d
@@ -31,3 +31,4 @@ void main()
     } while (!feof(fp));
     //fclose(fp);
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testthread2.d b/gcc/testsuite/gdc.test/runnable/testthread2.d
index 008d425..0ec6e0d 100644
--- a/gcc/testsuite/gdc.test/runnable/testthread2.d
+++ b/gcc/testsuite/gdc.test/runnable/testthread2.d
@@ -106,3 +106,4 @@ void main() {
     }
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/testtypeid.d b/gcc/testsuite/gdc.test/runnable/testtypeid.d
index 936dfaa..dcaac73 100644
--- a/gcc/testsuite/gdc.test/runnable/testtypeid.d
+++ b/gcc/testsuite/gdc.test/runnable/testtypeid.d
@@ -684,3 +684,4 @@ int main()
 
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/traits.d b/gcc/testsuite/gdc.test/runnable/traits.d
index b73ee01c..915f16d 100644
--- a/gcc/testsuite/gdc.test/runnable/traits.d
+++ b/gcc/testsuite/gdc.test/runnable/traits.d
@@ -1606,3 +1606,4 @@ int main()
     writeln("Success");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/wc.d b/gcc/testsuite/gdc.test/runnable/wc.d
index 7ee3586..e5fd98a 100644
--- a/gcc/testsuite/gdc.test/runnable/wc.d
+++ b/gcc/testsuite/gdc.test/runnable/wc.d
@@ -48,3 +48,4 @@ int main (string[] args)
     }
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/wc2.d b/gcc/testsuite/gdc.test/runnable/wc2.d
index 6229627..780f5f1 100644
--- a/gcc/testsuite/gdc.test/runnable/wc2.d
+++ b/gcc/testsuite/gdc.test/runnable/wc2.d
@@ -72,3 +72,4 @@ int main (string[] args)
     }
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/wc3.d b/gcc/testsuite/gdc.test/runnable/wc3.d
index 3cb4e25..666bfb9 100644
--- a/gcc/testsuite/gdc.test/runnable/wc3.d
+++ b/gcc/testsuite/gdc.test/runnable/wc3.d
@@ -70,3 +70,4 @@ int main (string[] args)
     }
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/xtest46.d b/gcc/testsuite/gdc.test/runnable/xtest46.d
index b3caffd..e1cdbcd 100644
--- a/gcc/testsuite/gdc.test/runnable/xtest46.d
+++ b/gcc/testsuite/gdc.test/runnable/xtest46.d
@@ -8283,3 +8283,4 @@ int main()
     printf("Success\n");
     return 0;
 }
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/gdc.test/runnable/xtest55.d b/gcc/testsuite/gdc.test/runnable/xtest55.d
index 3d41b99..1062a1a 100644
--- a/gcc/testsuite/gdc.test/runnable/xtest55.d
+++ b/gcc/testsuite/gdc.test/runnable/xtest55.d
@@ -22,3 +22,4 @@ int main()
     return 0;
 }
 
+// RUNNABLE_PHOBOS_TEST
diff --git a/gcc/testsuite/lib/gdc-utils.exp b/gcc/testsuite/lib/gdc-utils.exp
index 31a4cf0..87d1105 100644
--- a/gcc/testsuite/lib/gdc-utils.exp
+++ b/gcc/testsuite/lib/gdc-utils.exp
@@ -208,6 +208,7 @@ proc gdc-convert-test { base test } {
 
     set extra_sources ""
     set extra_files ""
+    set needs_phobos 0
 
     upvar 1 compilable_do_what compilable_do_what
     set compilable_output_file_ext ""
@@ -296,6 +297,11 @@ proc gdc-convert-test { base test } {
 	    }
 	    regsub -- {COMPILED_IMPORTS.*$} $copy_line "" out_line
 
+	} elseif [regexp -- {RUNNABLE_PHOBOS_TEST} $copy_line match sources] {
+	    # RUNNABLE_PHOBOS_TEST annotates tests that import the std module.
+	    # It will need skipping if phobos is not available on the target.
+	    regsub -- {RUNNABLE_PHOBOS_TEST.*$} $copy_line "" out_line
+	    set needs_phobos 1
 	}
 
 	puts $fdout $out_line
@@ -331,6 +337,9 @@ proc gdc-convert-test { base test } {
 	    if ![isnative] {
 		puts $fdout "// { dg-final { output-exists } }"
 	    }
+	    if $needs_phobos {
+		puts $fdout "// { dg-skip-if \"imports phobos\" { ! d_runtime_has_std_library } }"
+	    }
 	}
 
 	compilable {