try various gcc invocations in p5test

p5test/p5test.pl

@@ -36,10 +36,14 @@
 </configuration>
 END
 
-system($csc,"test4.cs");
-system("$cc -shared -o test4lib.$Config{so} test4lib.c");
-my $ok4 = `mono test4.exe`;
-is $ok4,"OK 4\n","We call C code from mono";
+for my $invocation ("$cc -shared ","$cc -m32 -shared","$cc -m32 -shared -fPIC","gcc -dynamiclib -current_version 1.0") {
+    unlink("test4lib.$Config{so}");
+    system($csc,"test4.cs");
+    system("$invocation -o test4lib.$Config{so} test4lib.c");
+    my $ok4 = `mono test4.exe`;
+    diag('resulting library: '.`file test4lib.$Config{so}`);
+    is $ok4,"OK 4\n","We call C code from mono using $invocation";
+}
 
 my $lib_path5 = rel2abs("test5lib.$Config{so}");
 open(my $test5_config,">test5.exe.config");
@@ -52,7 +56,7 @@ END
 system($csc,"test5.cs");
 system("$cc -shared -o test5lib.$Config{so} test5lib.c $ccopts $ldopts");
 my $ok5 = `mono test5.exe`;
-is $ok5,"OK 5\n","We call C code from mono";
+is $ok5,"OK 5\n","We call P5 code from mono";
 
 
 done_testing;