update Fortran bindings

CMakeLists.txt

@@ -55,9 +55,11 @@ if (INFO)
 endif()
 
 if (USE_FORTRAN)
+   message(STATUS "Currently, Fortran bindings are not built by cmake.")
+   message(STATUS "They can be built by running make in fortran directory.")
   enable_language(Fortran)
 else()
-  message(STATUS "Skipping Fortran bindings. Add -D USE_FORTRAN=1 to build them.")
+  #message(STATUS "Skipping Fortran bindings. Add -D USE_FORTRAN=1 to build them.")
 endif()
 
 if (DEFINED ENV{EXTRA_WFLAGS})

docs/install.rst

@@ -95,18 +95,25 @@ Fortran and C bindings
 ----------------------
 
 The Fortran bindings are in early stage and are not documented yet.
-They use the ISO_C_BINDING module introduced in Fortran 2003.
+They use the ISO_C_BINDING module introduced in Fortran 2003
+and `shroud <https://github.com/LLNL/shroud>`_ (the latest version from git).
 You may see the ``fortran/`` directory to know what to expect.
-The bindings and usage examples can be compiled with CMake::
+This directory contains Makefile -- run make to built the bindings.
+(They are currently not integrated with the cmake build.)
+
+..
+ The bindings and usage examples can be compiled with CMake::
 
     cmake -D USE_FORTRAN=1 .
     make
 
 The C bindings are used only for making Fortran bindings,
 but they should be usable on their own.
-If you use cmake to build the project
-you get a static library ``libcgemmi.a`` that can be used from C,
-together with the :file:`fortran/*.h` headers.
+
+..
+ If you use cmake to build the project
+ you get a static library ``libcgemmi.a`` that can be used from C,
+ together with the :file:`fortran/*.h` headers.
 
 Program
 -------

c_fortran/Makefile → fortran/Makefile

@@ -34,7 +34,7 @@ clean:
 	rm -f $(TEST_PROGS) *.a *.o *.mod
 	rm -f wrap* types*.h util*.cpp *.json *.log gemmi_types.yaml
 
-$(C_OBJS:.o=.cpp) $(F_OBJS:.o=.f): gemmi.yaml
+$(C_OBJS:.o=.cpp) $(F_OBJS:.o=.f90): gemmi.yaml
 	shroud gemmi.yaml
 
 %.o: %.cpp

c_fortran/gemmi.yaml → fortran/gemmi.yaml

@@ -2,10 +2,12 @@ library: gemmi
 namespace: gemmi
 format:
   C_prefix: ge_
+  F_filename_suffix: f90
 options:
   wrap_struct_as: class
   C_line_length: 94
   F_line_length: 94
+  F_API_case: lower
 
 splicer_code:
   c: