libphobos: Skip curl tests if libcurl is not installed on the target.

libphobos/ChangeLog:

2019-04-24  Iain Buclaw  <ibuclaw@gdcproject.org>

	PR d/88654
	* testsuite/lib/libphobos.exp (libphobos-dg-test): Check
	libphobos_skipped_test_p before running test.
	(libphobos-dg-prune): New proc.
	(libphobos_init): Set libphobos_skip_tests.
	(libphobos_skipped_test_p): New proc.
	(check_effective_target_libcurl_available): New proc.
	* testsuite/libphobos.phobos/phobos.exp: Skip curl tests if library
	not found.
	* testsuite/libphobos.phobos_shared/phobos_shared.exp: Likewise.

From-SVN: r270545

libphobos/ChangeLog

@@ -1,3 +1,16 @@
+2019-04-24  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	PR d/88654
+	* testsuite/lib/libphobos.exp (libphobos-dg-test): Check
+	libphobos_skipped_test_p before running test.
+	(libphobos-dg-prune): New proc.
+	(libphobos_init): Set libphobos_skip_tests.
+	(libphobos_skipped_test_p): New proc.
+	(check_effective_target_libcurl_available): New proc.
+	* testsuite/libphobos.phobos/phobos.exp: Skip curl tests if library
+	not found.
+	* testsuite/libphobos.phobos_shared/phobos_shared.exp: Likewise.
+
 2019-04-24  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	PR d/88431

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"]
+}

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
 

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