[PR,d/88654] Committed skip curl tests if libcurl is not installed on the target.

diff --git a/libphobos/testsuite/lib/libphobos.exp b/libphobos/testsuite/lib/libphobos.exp
index 6d113bc5172..d47da178b7e 100644
--- a/libphobos/testsuite/lib/libphobos.exp
+++ b/libphobos/testsuite/lib/libphobos.exp
@@ -47,8 +47,8 @@  proc libphobos-dg-test { prog do_what extra_tool_flags } {
     set output_file ""
 
     global libphobos_test_name
+    upvar name name
     if { $libphobos_test_name != "" } {
-	upvar name name
 	set name $libphobos_test_name
     }
 
@@ -80,11 +80,19 @@  proc libphobos-dg-test { prog do_what extra_tool_flags } {
 	lappend options "additional_flags=$extra_tool_flags"
     }
 
-    set comp_output [$select_compile "$prog" "$output_file" "$compile_type" $options]
+    set unsupported_message [libphobos_skipped_test_p $name]
+    if { $unsupported_message != "" } {
+	return [list "::unsupported::$unsupported_message" $output_file]
+    }
 
+    set comp_output [$select_compile "$prog" "$output_file" "$compile_type" $options]
     return [list $comp_output $output_file]
 }
 
+proc libphobos-dg-prune { system text } {
+    return $text
+}
+
 #
 # libphobos_init
 #
@@ -120,6 +128,9 @@  proc libphobos_init { args } {
     global libphobos_test_name
     set libphobos_test_name ""
 
+    global libphobos_skip_tests
+    set libphobos_skip_tests { }
+
     # Default settings.
     set blddir [lookfor_file [get_multilibs] libphobos]
     set flags_file "${blddir}/testsuite/testsuite_flags"
@@ -143,7 +154,7 @@  proc libphobos_init { args } {
     }
 
     # Compute what needs to be added to the existing LD_LIBRARY_PATH.
-    set ld_library_path ""
+    set ld_library_path "."
 
     set gccdir [lookfor_file $tool_root_dir gcc/libgcc.a]
     if {$gccdir != ""} {
@@ -218,3 +229,35 @@  proc filter_libphobos_unittests { list } {
     }
     return $res
 }
+
+# Skip the unittest (report it as UNSUPPORTED) if the module exists in
+# libphobos_skip_tests and its target list is matched by dg-process-target.
+#
+# The expected format of the libphobos_skip_tests file is:
+# { test { targets } }
+proc libphobos_skipped_test_p { test } {
+    global libphobos_skip_tests
+
+    set row [lsearch -inline -index 0 $libphobos_skip_tests $test]
+    if { $row eq "" } {
+	return ""
+    }
+
+    if { [llength $row] != 2 } {
+	error "syntax error in libphobos_skip_tests: $row"
+    }
+
+    set selector [list target [lindex $row 1]]
+    if { [dg-process-target-1 $selector] != "S" } {
+	return ""
+    }
+
+    return "skipped test"
+}
+
+# Return true if the curl library is supported on the target.
+proc check_effective_target_libcurl_available { } {
+    return [check_no_compiler_messages libcurl_available executable {
+	int main (void) { return 0; }
+    } "-lcurl"]
+}
diff --git a/libphobos/testsuite/libphobos.phobos/phobos.exp b/libphobos/testsuite/libphobos.phobos/phobos.exp
index 8ace023a832..4b731d34cb6 100644
--- a/libphobos/testsuite/libphobos.phobos/phobos.exp
+++ b/libphobos/testsuite/libphobos.phobos/phobos.exp
@@ -22,6 +22,12 @@  if { ![isnative] || ![is-effective-target static] } {
 # Gather a list of all tests.
 set tests [lsort [filter_libphobos_unittests [find $srcdir/../src "*.d"]]]
 
+set libphobos_skip_tests {
+    # Skip curl tests if library is not available
+    { libphobos.phobos/etc/c/curl.d { ! libcurl_available } }
+    { libphobos.phobos/std/net/curl.d { ! libcurl_available } }
+}
+
 # Initialize dg.
 dg-init
 
diff --git a/libphobos/testsuite/libphobos.phobos_shared/phobos_shared.exp b/libphobos/testsuite/libphobos.phobos_shared/phobos_shared.exp
index b0510914499..f651abbed78 100644
--- a/libphobos/testsuite/libphobos.phobos_shared/phobos_shared.exp
+++ b/libphobos/testsuite/libphobos.phobos_shared/phobos_shared.exp
@@ -22,6 +22,12 @@  if { ![isnative] || ![is-effective-target shared] } {
 # Gather a list of all tests.
 set tests [lsort [filter_libphobos_unittests [find $srcdir/../src "*.d"]]]
 
+set libphobos_skip_tests {
+    # Skip curl tests if library is not available
+    { libphobos.phobos_shared/etc/c/curl.d { ! libcurl_available } }
+    { libphobos.phobos_shared/std/net/curl.d { ! libcurl_available } }
+}
+
 # Initialize dg.
 dg-init