re PR fortran/31201 (Too large unit number generates wrong code)

re PR fortran/31201 (Too large unit number generates wrong code)

2007-05-06  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
	    Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>

	PR fortran/31201
	* gfortran.h: Add runtime error codes from libgfortran.h. Define
	MAX_UNIT_NUMBER.
	* trans.c (gfc_trans_runtime_check): Update the format of runtime error
	messages to match library runtime errors.  Use call to new library
	function runtime_error_at().
	* trans.h: Add prototype for new function gfc_trans_io_runtime_check.
	Add declaration for library functions runtime_error_at and
	generate_error.
	* trans_io.c (gfc_trans_io_runtime_check): New function.
	(set_parameter_value): Add error checking for UNIT numbers.
	(set_parameter_ref): Initialize the users variable to zero.
	(gfc_trans_open): Move setting of unit number to after setting of common
	flags so that runtime error trapping can be detected.
	(gfc_trans_close): Likewise. (build_filepos): Likewise.
	(gfc_trans_inquire): Likewise. (build_dt): Likewise.
	* trans-decl.c: Add declarations for runtime_error_at and
	generate_error. (gfc_build_builtin_function_decls): Build function
	declarations for runtime_error_at and generate_error.

Co-Authored-By: Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
From-SVN: r124480