re PR fortran/23815 (Add -byteswapio flag)

2005-02-06  Thomas Koenig  <Thomas.Koenig@online.de>

	PR libfortran/23815
	* gfortran.texi: Document the GFORTRAN_CONVERT_UNIT environment
	variable.
	* invoke.texi:  Mention the "Runtime" chapter.
	Document the -fconvert= option.
	* gfortran.h:  Add options_convert.
	* lang.opt:  Add fconvert=little-endian, fconvert=big-endian,
	fconvert=native and fconvert=swap.
	* trans-decl.c (top level):  Add gfor_fndecl_set_convert.
	(gfc_build_builtin_function_decls):  Set gfor_fndecl_set_convert.
	(gfc_generate_function_code):  If -fconvert was specified,
	and this is the main program, add a call to set_convert().
	* options.c:  Handle the -fconvert options.

2005-02-06  Thomas Koenig  <Thomas.Koenig@online.de>

	PR libfortran/23815
	* runtime/environ.c (init_unformatted):  Add GFORTRAN_CONVERT_UNIT
	environment variable.
	(top level):  Add defines, type and static variables for
	GFORTRAN_CONVERT_UNIT handling.
	(search_unit):  New function.
	(match_word): New function.
	(match_integer): New function.
	(next_token): New function.
	(push_token): New function.
	(mark_single): New function.
	(mark_range): New funciton.
	(do_parse): New function.
	(init_unformatted): New function.
	(get_unformatted_convert): New function.
	* runtime/compile_options.c:  Add set_convert().
	* libgfortran.h:  Add convert to compile_options_t.
	* io/open.c (st_open): Call get_unformatted_convert to get
	unit default; if CONVERT_NONE is returned, check for
	the presence of a CONVERT specifier and use it.
	As default, use compile_options.convert.
	* io/io.h (top level): Add CONVERT_NONE to unit_convert, to signal
	"nothing has been set".
	(top level): Add prototype for get_unformatted_convert.

2005-02-06  Thomas Koenig  <Thomas.Koenig@online.de>

	PR libfortran/23815
	* unf_io_convert_4.f90:  New test.

From-SVN: r110664

1 files changed, 28 insertions, 0 deletions

diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
index 5816207d..8d7a1d5 100644
--- a/gcc/fortran/invoke.texi
+++ b/gcc/fortran/invoke.texi
@@ -98,6 +98,7 @@ one is not the default.
 * Warning Options::     How picky should the compiler be?
 * Debugging Options::   Symbol tables, measurements, and debugging dumps.
 * Directory Options::   Where to find module files
+* Runtime Options::     Influencing runtime behavior
 * Code Gen Options::    Specifying conventions for function calls, data layout
                         and register usage.
 * Environment Variables:: Env vars that affect GNU Fortran.
@@ -141,6 +142,11 @@ by type.  Explanations are in the following sections.
 @gccoptlist{
 -I@var{dir}  -M@var{dir}}
 
+@item Runtime Options
+@xref{Runtime Options,,Options for influencing runtime behavior}.
+@gccoptlist{
+-fconvert=@var{conversion}}
+
 @item Code Generation Options
 @xref{Code Gen Options,,Options for Code Generation Conventions}.
 @gccoptlist{
@@ -155,6 +161,7 @@ by type.  Explanations are in the following sections.
 * Warning Options::     How picky should the compiler be?
 * Debugging Options::   Symbol tables, measurements, and debugging dumps.
 * Directory Options::   Where to find module files
+* Runtime Options::     Influencing runtime behavior
 * Code Gen Options::    Specifying conventions for function calls, data layout
                         and register usage.
 @end menu
@@ -557,6 +564,25 @@ The default is the current directory.
 GCC options.
 @end table
 
+@node Runtime Options
+@section Influencing runtime behavior
+@cindex runtime, options
+
+These options affect the runtime behavior of @command{gfortran}.
+@table @gcctabopt
+@cindex -fconvert=@var{conversion} option
+@item -fconvert=@var{conversion}
+Specify the representation of data for unformatted files.  Valid
+values for conversion are: @samp{native}, the default; @samp{swap},
+swap between big- and little-endian; @samp{big-endian}, use big-endian
+representation for unformatted files; @samp{little-endian}, use little-endian
+representation for unformatted files.
+
+@emph{This option has an effect only when used in the main program.
+The @code{CONVERT} specifier and the GFORTRAN_CONVERT_UNIT environment
+variable override the default specified by -fconvert.}
+@end table
+
 @node Code Gen Options
 @section Options for Code Generation Conventions
 @cindex code generation, conventions
@@ -796,4 +822,6 @@ that affect the operation of @command{gcc}.
 gcc,Using the GNU Compiler Collection (GCC)}, for information on environment
 variables.
 
+@xref{Runtime}, for environment variables that affect the
+run-time behavior of @command{gfortran} programs.
 @c man end