Hi All!

Proposed patch to:

Bug 100906 - Bind(c): failure handling character with len/=1
Bug 100907 - Bind(c): failure handling wide character
Bug 100911 - Bind(c): failure handling C_PTR
Bug 100914 - Bind(c): errors handling complex
Bug 100915 - Bind(c): failure handling C_FUNPTR
Bug 100916 - Bind(c): CFI_type_other unimplemented

Patch tested only on x86_64-pc-linux-gnu.

This patch deals with improving C interoperability.

The identification of type and kind is improved, support for C_PTR and 
C_FUNPTR is introduced, non interoperability types are now properly 
marked as CFI_type_other.

This patch partially depends on the patch: "PR 
fortran/93308/93963/94327/94331/97046 problems raised by descriptor 
handling"

Thank you very much.

Best regards,
José Rui

Fortran: Fixes to type and kind handling in ISO_Fortran_binding.

gcc/fortran/ChangeLog:

	PR fortran/100907
	PR fortran/100911
	PR fortran/100915
	PR fortran/100916
	* decl.c (gfc_verify_c_interop): add missing C_PTR and C_FUNPTR as
	C interop types.
	* trans-array.c (gfc_conv_descriptor_type): new function to access
	the type field from the dtype descriptor field.
	* trans-array.h (gfc_conv_descriptor_type): new prototype.
	* trans-decl.c (convert_CFI_desc): add support for handlinng non C
	interop wide character type.
	* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): add support for
	CFI_type_other.

libgfortran/ChangeLog:

	PR fortran/100906
	PR fortran/100907
	PR fortran/100911
	PR fortran/100914
	PR fortran/100915
	PR fortran/100916
	* ISO_Fortran_binding.h: adds helper macros to handle type and
	kind conversion between CFI and GFC descriptors.
	(_CFI_DECODE_TYPE): extract type from an encoded CFI type.
	(_CFI_DECODE_KIND): extract kind from an encoded CFI type.
	(_CFI_ENCODE_TYPE): encode a CFI type.
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc):
	improvements to the handling of type and kind information.
	(gfc_desc_to_cfi_desc): improvements to the handling of type and
	kind information.

gcc/testsuite/ChangeLog:

	PR fortran/100906
	PR fortran/100907
	PR fortran/100911
	PR fortran/100914
	PR fortran/100915
	PR fortran/100916
	* gfortran.dg/ISO_Fortran_binding_1.f90:
	* gfortran.dg/bind_c_array_params_2.f90:
	* gfortran.dg/PR100906.c: New test.
	* gfortran.dg/PR100906.f90: New test.
	* gfortran.dg/PR100907.c: New test.
	* gfortran.dg/PR100907.f90: New test.
	* gfortran.dg/PR100911.c: New test.
	* gfortran.dg/PR100911.f90: New test.
	* gfortran.dg/PR100914.c: New test.
	* gfortran.dg/PR100914.f90: New test.
	* gfortran.dg/PR100915.c: New test.
	* gfortran.dg/PR100915.f90: New test.
	* gfortran.dg/PR100916.c: New test.
	* gfortran.dg/PR100916.f90: New test.