add test example

Author: perazz

ci/run_tests.sh

@@ -164,6 +164,11 @@ pushd program_with_module
 "$fpm" run --target Program_with_module
 popd
 
+pushd program_with_cpp_guarded_module
+"$fpm" build
+"$fpm" run 
+popd
+
 pushd link_executable
 "$fpm" build
 "$fpm" run --target gomp_test

example_packages/program_with_cpp_guarded_module/.gitignore

@@ -0,0 +1 @@
+build/*

example_packages/program_with_cpp_guarded_module/app/main.f90

@@ -0,0 +1,12 @@
+program program_with_module
+#if defined(HAVE_MODULE)
+  use greet_m, only: greeting
+#endif  
+  implicit none
+
+#ifndef HAVE_MODULE
+  print *, 'OK without module'
+#else  
+  print *, greeting
+#endif  
+end program program_with_module

example_packages/program_with_cpp_guarded_module/fpm.toml

@@ -0,0 +1,3 @@
+name = "Program_with_cpp_guarded_module"
+# Enable CPP but do not define macros
+[preprocess.cpp]