use '-Werror=unused-parameter' for gcc/clang on project tests and -fimplicit-none on fortran

Fortran: check for undeclared variables by forcing implicit none everywhere
C/C++: check for unused parameters and return types

removed unused variables from test cases

ci: do missing return and unused arg check with Github Actions

1 files changed, 1 insertions, 1 deletions

diff --git a/test cases/common/137 c cpp and asm/main.cpp b/test cases/common/137 c cpp and asm/main.cpp
index c08987073..2abd08486 100644
--- a/test cases/common/137 c cpp and asm/main.cpp
+++ b/test cases/common/137 c cpp and asm/main.cpp
@@ -5,7 +5,7 @@ extern "C" {
   int get_cval(void);
 }
 
-int main(int argc, char **argv) {
+int main() {
   std::cout << "C++ seems to be working." << std::endl;
   return get_retval();
 }