options/ansi: Flush all files on exit and flush all files when fflush(NULL) is called.

Signed-off-by: Dennisbonke <admin@dennisbonke.com>

options/ansi/generic/file-io.cpp

@@ -578,6 +578,15 @@ long ftell(FILE *file_base) {
 }
 
 int fflush_unlocked(FILE *file_base) {
+	if(file_base == NULL) {
+		// Only flush the files but do not close them.
+    	for(auto it : mlibc::global_file_list) {
+			if(int e = it->flush(); e)
+				mlibc::infoLogger() << "mlibc warning: Failed to flush file"
+						<< frg::endlog;
+		}
+		return 0;
+	}
 	auto file = static_cast<mlibc::abstract_file *>(file_base);
 	if(file->flush())
 		return EOF;

options/ansi/generic/stdlib-stubs.cpp

@@ -4,6 +4,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
+#include <stdio.h>
 
 #include <frg/random.hpp>
 #include <mlibc/debug.hpp>