ld: Skip unsupported static executable tests

Skip static executable tests if static executable is unsupported.
Tested on Linux/x86 without libc.a.

	PR ld/22732
	* testsuite/config/default.exp (STATIC_LDFLAGS): New.  Set to
	"-static" if target compiler supports it.
	* testsuite/ld-bootstrap/bootstrap.exp: Skip static executable
	tests if target compiler doesn't support it.
	* testsuite/ld-ifunc/ifunc.exp: Likewise.
	* testsuite/lib/ld-lib.exp (run_ld_link_exec_tests): Likewise.
	(run_cc_link_tests): Likewise.

1 files changed, 37 insertions, 0 deletions

diff --git a/ld/testsuite/config/default.exp b/ld/testsuite/config/default.exp
index fe3bd3204aa..704ac300e40 100644
--- a/ld/testsuite/config/default.exp
+++ b/ld/testsuite/config/default.exp
@@ -413,3 +413,40 @@ if { ![info exists INT128_CFLAGS] } then {
 	set INT128_CFLAGS ""
     }
 }
+
+# Set STATIC_LDFLAGS to "-static" if target compiler supports it.
+
+if { ![info exists STATIC_LDFLAGS] } then {
+    if { [which $CC] != 0 } {
+	# Check if gcc supports -static.
+	set flags ""
+	if [board_info [target_info name] exists cflags] {
+	    append flags " [board_info [target_info name] cflags]"
+	}
+	if [board_info [target_info name] exists ldflags] {
+	    append flags " [board_info [target_info name] ldflags]"
+	}
+
+	set basename "tmpdir/static[pid]"
+	set src ${basename}.c
+	set output ${basename}
+	set f [open $src "w"]
+	puts $f "int main (void) { return 0; }"
+	close $f
+	if [is_remote host] {
+	    set src [remote_download host $src]
+	}
+	set static_available [run_host_cmd_yesno "$CC" "-static $flags $src -o $output"]
+	remote_file host delete $src
+	remote_file host delete $output
+	file delete $src
+
+	if { $static_available == 1 } then {
+	    set STATIC_LDFLAGS "-static"
+	} else {
+	    set STATIC_LDFLAGS ""
+	}
+    } else {
+	set STATIC_LDFLAGS ""
+    }
+}