Add: example package with c code compilation

1 files changed, 26 insertions, 0 deletions

diff --git a/test/example_packages/with_c/src/with_c.f90 b/test/example_packages/with_c/src/with_c.f90
new file mode 100644
index 0000000..edd839e
--- /dev/null
+++ b/test/example_packages/with_c/src/with_c.f90
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+module with_c
+    use iso_c_binding, only: c_char, c_int, c_null_char
+    implicit none
+
+contains
+
+    function system_isdir(dirname)
+        ! Source (Public domain): https://github.com/urbanjost/M_system
+        !
+        implicit none
+        character(len=*),intent(in) :: dirname
+        logical                     :: system_isdir
+        
+        interface
+            function c_isdir(dirname) bind (C,name="my_isdir") result (c_ierr)
+            import c_char,c_int
+            character(kind=c_char,len=1),intent(in) :: dirname(*)
+            integer(kind=c_int)                     :: c_ierr
+            end function c_isdir
+        end interface
+        
+        system_isdir= c_isdir(trim(dirname)//c_null_char) == 1
+        
+    end function system_isdir
+
+end module with_c
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