File iso-cpp.patch of Package pacman
diff -Nur pacman-1_002/pac.cc new/pac.cc
--- pacman-1_002/pac.cc 2020-06-01 08:34:53.085282639 +0200
+++ new/pac.cc 2020-06-01 08:35:40.677635017 +0200
@@ -82,7 +82,7 @@
UserInterface::setlpCmdLine(lpCmdLine);
UserInterface::setnCmdShow(nCmdShow);
#else
-main(int argc,char **argv) {
+int main(int argc,char **argv) {
Argument(argc, argv); // storing the command line arguments
#endif