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[PATCH] [LIBPHOBOS] Fix multi-lib RUNTESTFLAGS handling


Hi,


I've noticed that testing libphobos fails for multi-lib configs:

$ make check-target-libphobos RUNTESTFLAGS="--target_board=unix\{-m32,\}"

fails for every 32bit execution, because the host libgcc_s.so is used which
is not the correct version:

spawn [open ...]
./test_aa.exe: /lib/i386-linux-gnu/libgcc_s.so.1: version `GCC_7.0.0' not found (required by ./test_aa.exe)
FAIL: libphobos.aa/test_aa.d execution test

This can be fixed by adding a few lines from libstdc++/testsuite/lib/libstdc++.exp
to libphobos/testsuite/lib/libphobos.exp, see attached patch.


Bootstrapped and reg-tested on x86_64-pc-linux-gnu.
Is it OK for trunk?


Thanks
Bernd.

2019-09-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>

	* testsuite/lib/libphobos.exp (libphobos_init): Add multi-lib libgcc dirs
	to the ld_library_path var.

Index: libphobos/testsuite/lib/libphobos.exp
===================================================================
--- libphobos/testsuite/lib/libphobos.exp	(revision 275320)
+++ libphobos/testsuite/lib/libphobos.exp	(working copy)
@@ -170,6 +170,25 @@ proc libphobos_init { args } {
 	append ld_library_path ":${blddir}/src/.libs"
     }
 
+    # Compute what needs to be added to the existing LD_LIBRARY_PATH.
+    if {$gccdir != ""} {
+	set compiler ${gccdir}/gdc
+
+	if { [is_remote host] == 0 && [which $compiler] != 0 } {
+	  foreach i "[exec $compiler --print-multi-lib]" {
+	    set mldir ""
+	    regexp -- "\[a-z0-9=_/\.-\]*;" $i mldir
+	    set mldir [string trimright $mldir "\;@"]
+	    if { "$mldir" == "." } {
+	      continue
+	    }
+	    if { [llength [glob -nocomplain ${gccdir}/${mldir}/libgcc_s*.so.*]] >= 1 } {
+	      append ld_library_path ":${gccdir}/${mldir}"
+	    }
+	  }
+	}
+    }
+
     set_ld_library_path_env_vars
 
     libphobos_maybe_build_wrapper "${objdir}/testglue.o"

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