PR libfortran/90274
        * io/format.c (parse_format_list): Implement the E0 exponent
        width to provide smallest possible width for exponent fields.
        Refactor code for correct parsing and better readability of the
        code.
        * io/io.h (write_real_w0): Change interface to pass in pointer
        to fnode.
        * io/transfer.c: Update all calls to write_real_w0 to use the
        new interface.
        * io/write.c ((write_real_w0): Use the new interface with fnode
        to access both the decimal precision and exponent widths used in
        build_float_string.
        * io/write_float.def (build_float_string): Use the passed in
        exponent width to calculate the used width in the case of E0.

From-SVN: r279828

From-SVN: r279813

re PR libfortran/90374 (Fortran 2018: Support d0.d, e0.d, es0.d, en0.d, g0.d and ew.d e0 edit descriptors for output)

2019-12-01  Jerry DeLisle  <jvdelisle@gcc.ngu.org>

	PR fortran/90374
	* io/format.c (parse_format_list): Add braces to disambiguate
	conditional.

From-SVN: r278886

re PR libfortran/90374 (Fortran 2018: Support d0.d, e0.d, es0.d, en0.d, g0.d and ew.d e0 edit descriptors for output)

	PR fortran/90374
	* io.c (check_format): Allow zero width expoenent with e0.

	* io/format.c (parse_format_list): Relax format checking to allow
	e0 exponent specifier.

	* gfortran.dg/fmt_zero_width.f90: Update test.

From-SVN: r278817

2019-11-24  Jerry DeLisle  <jvdelisle@gcc.ngu.org>

	PR fortran/92100
	io/transfer.c (data_transfer_init_worker): Use fbuf_reset
	instead of fbuf_flush before the seek. Note that fbuf_reset
	calls fbuf_flush and adjusts fbuf pointers.

From-SVN: r278660

2019-11-23  Thomas Koenig  <tkoenig@gcc.gnu.org>
	Harald Anlauf <anlauf@gmx.de>

	PR fortran/92569
	* io/transfer.c (transfer_array_inner):  If position is
	at AFTER_ENDFILE in current unit, return from data loop.

2019-11-23  Thomas Koenig  <tkoenig@gcc.gnu.org>
	Harald Anlauf <anlauf@gmx.de>

	PR fortran/92569
	* gfortran.dg/eof_6.f90: New test.


Co-Authored-By: Harald Anlauf <anlauf@gmx.de>

From-SVN: r278659

A change made with r271340 ("libfortran/90038: Use posix_spawn instead
of fork") accidentally brought the obsolete `runstatedir' setting back
in.  Fix it.

	libgfortran/
	* Makefile.in: Regenerate.

From-SVN: r278383

        libgfortran/
        PR fortran/92470
        * runtime/ISO_Fortran_binding.c (CFI_establish): Set lower_bound to 0
        also for CFI_attribute_other.

        gcc/testsuite/
        PR fortran/92470
        * gfortran.dg/ISO_Fortran_binding_1.c (establish_c): Add assert for
        lower_bound == 0.

From-SVN: r278128

        libgfortran/
        PR fortran/92470
        * runtime/ISO_Fortran_binding.c (CFI_address): Handle non-zero
        lower_bound; update error message.
        (CFI_allocate): Fix comment typo.
        (CFI_establish): Fix identation, fix typos, don't check values of 'dv'
        argument.

        gcc/testsuite/
        PR fortran/92470
        * gfortran.dg/ISO_Fortran_binding_17.c: New.
        * gfortran.dg/ISO_Fortran_binding_17.f90: New.
        * gfortran.dg/ISO_Fortran_binding_1.c (elemental_mult_c, allocate_c,
        section_c, select_part_c): Update for CFI_{address} changes;
        add asserts.

From-SVN: r278101

2019-11-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

        libgfortran/
        PR fortran/92142
        * runtime/ISO_Fortran_binding.c (CFI_setpointer): Don't
        override descriptor attribute; with -fcheck, check that
        it is a pointer.

        gcc/testsuite/
        PR fortran/92142
        * gcc/testsuite/gfortran.dg/ISO_Fortran_binding_16.c: New.
        * gcc/testsuite/gfortran.dg/ISO_Fortran_binding_16.f90: New.
        * gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.c: Correct
        upper bounds for case 0.

From-SVN: r278048

re PR libfortran/90374 (Fortran 2018: Support d0.d, e0.d, es0.d, en0.d, g0.d and ew.d e0 edit descriptors for output)

2019-11-06  Jerry DeLisle  <jvdelisle@gcc.ngu.org>

	PR fortran/90374
	* io.c (check_format): Allow zero width for D, E, EN, and ES
	specifiers as default and when -std=F2018 is given. Retain
	existing errors when using the -fdec family of flags.

	* libgfortran/io/format.c (parse_format_list): Relax format checking for
	zero width as default and when -std=f2018.
	io/format.h (format_token): Move definition to io.h.
	io/io.h (format_token): Add definition here to allow access to
	this definition at higher levels. Rename the declaration of
	write_real_g0 to write_real_w0 and add a new format_token
	argument, allowing higher level functions to pass in the
	token for handling of g0 vs the other zero width specifiers.
	io/transfer.c (formatted_transfer_scalar_write): Add checks for
	zero width and call write_real_w0 to handle it.
	io/write.c (write_real_g0): Remove.
	(write_real_w0): Add new, same as previous write_real_g0 except
	check format token to handle the g0 case.

	* gfortran.dg/fmt_error_10.f: Modify for new constraints.
	* gfortran.dg/fmt_error_7.f: Add dg-options "-std=f95".
	* gfortran.dg/fmt_error_9.f: Modify for new constraints.
	* gfortran.dg/fmt_zero_width.f90: New test.

From-SVN: r277905

        gcc/fortran/
        PR fortran/92284.
        * trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Free CFI descriptor
        at the end; partial revised revert of Rev. 277502.

        libgfortran/
        PR fortran/92284.
        * runtime/ISO_Fortran_binding.c (gfc_desc_to_cfi_desc):

        gcc/testsuite/
        PR fortran/92284.
        * gfortran.dg/bind-c-intent-out.f90: Update expected dump;
        extend comment.
        * gfortran.dg/bind_c_array_params_3.f90: New.
        * gfortran.dg/bind_c_array_params_3_aux.c: New.

From-SVN: r277663

2019-10-19  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/91926
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Revert
	the change made on 2019-10-05.

From-SVN: r277204

Extend 'libgfortran/runtime/minimal.c' per r274599 "PR fortran/68401 Improve allocation error message"

	libgfortran/
	PR fortran/68401
	* runtime/minimal.c (os_error_at): New function.

From-SVN: r276691

	libgfortran/
	* runtime/minimal.c: Revise.

From-SVN: r276690

2019-10-05  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/91926
	* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Correct the
	assignment of the attribute field to account correctly for an
	assumed shape dummy. Assign separately to the gfc and cfi
	descriptors since the atribute can be different. Add btanch to
	correctly handle missing optional dummies.

2019-10-05  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/91926
	* gfortran.dg/ISO_Fortran_binding_13.f90 : New test.
	* gfortran.dg/ISO_Fortran_binding_13.c : Additional source.
	* gfortran.dg/ISO_Fortran_binding_14.f90 : New test.

2019-10-05  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/91926
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Do not
	modify the bounds and offset for CFI_other.

From-SVN: r276624

2019-10-01  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/91593
	* io/read.c (read_decimal): Cast constant to size_t to turn off
	a bogus warning.
	* io/write.c (btoa_big): Use memset in lieu of setting the null
	byte in a string buffer to turn off a bogus warning.

From-SVN: r276439

2019-09-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/91593
	* io/io.h: Add gcc_unreachable().
	* io/transfer.c (file_mode, current_mode,
	formatted_transfer_scalar_read, formatted_transfer_scalar_write,
	pre_position, next_record_r, next_record_w): Add and use
	FORMATTED_UNSPECIFIED to enumeration.

From-SVN: r276255

A change made with r275564 ("[ARM/FDPIC v6 02/24] [ARM] FDPIC: Handle 
arm*-*-uclinuxfdpiceabi in configure scripts") to libtool.m4 has not 
regenerated all the `configure' scripts affected.  Fix it.

	gcc/
	* configure: Regenerate.

	libatomic/
	* configure: Regenerate.

	libbacktrace/
	* configure: Regenerate.

	libcc1/
	* configure: Regenerate.

	libffi/
	* configure: Regenerate.

	libgfortran/
	* configure: Regenerate.

	libgomp/
	* configure: Regenerate.

	libhsail-rt/
	* configure: Regenerate.

	libitm/
	* configure: Regenerate.

	libobjc/
	* configure: Regenerate.

	liboffloadmic/
	* configure: Regenerate.

	libphobos/
	* configure: Regenerate.

	libquadmath/
	* configure: Regenerate.

	libsanitizer/
	* configure: Regenerate.

	libssp/
	* configure: Regenerate.

	libstdc++-v3/
	* configure: Regenerate.

	libvtv/
	* configure: Regenerate.

	lto-plugin/
	* configure: Regenerate.

	zlib/
	* configure: Regenerate.

From-SVN: r276213

Currently, when a new thread needs to use the RANDOM_NUMBER intrinsic,
the per-thread PRNG state is initialized by copying the master state
and then jumping forwards N*2**128 entries in the stream so that the
PRNG streams for different threads don't alias each other, where N is
the number of threads that have so far initialized the PRNG.

With this patch the master state itself is jumped forwards once each
time a new thread initializes the PRNG, thus obviating the need to
jump through all the N-1 previous streams. Effectively turning an O(N)
algorithm into an O(1) one.

Regtested on x86_64-pc-linux-gnu.

libgfortran/ChangeLog:

2019-09-05  Janne Blomqvist  <jb@gcc.gnu.org>

	* intrinsics/random.c (master_init): Replace with
	master_state.init.
	(njumps): Remove variable.
	(master_state): Make instance of struct prng_state.
	(init_rand_state): When jumping, update the master_state once
	instead of keeping track of how many jumps need to be done.
	(SZU64): Modify to handle new master_state.
	(SZ): Likewise.
	(random_seed_i4): Likewise.
	(random_seed_i8): Likewise.

From-SVN: r275397

Improve the error message that is printed when a memory allocation
fails, by including the location, and the size of the allocation that
failed.

Regtested on x86_64-pc-linux-gnu.

gcc/fortran/ChangeLog:

2019-08-17  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/68401
	* trans-decl.c (gfc_build_builtin_function_decls): Replace
	os_error with os_error_at decl.
	* trans.c (trans_runtime_error_vararg): Modify so the error
	function decl is passed directly.
	(gfc_trans_runtime_error): Pass correct error function decl.
	(gfc_trans_runtime_check): Likewise.
	(trans_os_error_at): New function.
	(gfc_call_malloc): Use trans_os_error_at.
	(gfc_allocate_using_malloc): Likewise.
	(gfc_call_realloc): Likewise.
	* trans.h (gfor_fndecl_os_error): Replace with gfor_fndecl_os_error_at.

libgfortran/ChangeLog:

2019-08-17  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/68401
	* gfortran.map: Add GFORTRAN_10 node, add _gfortran_os_error_at
	symbol.
	* libgfortran.h (os_error_at): New prototype.
	* runtime/error.c (os_error_at): New function.

From-SVN: r274599

Correctly fill master_seed from os_seed.

From-SVN: r274365

Update the PRNG from xorshift1024* to xoshiro256** by the same
author. For details see

http://prng.di.unimi.it/

and the paper at

https://arxiv.org/abs/1805.01407

Also the seeding is slightly improved, by reading only 8 bytes from
the operating system and using the simple splitmix64 PRNG to fill in
the rest of the PRNG state (as recommended by the xoshiro author),
instead of reading the entire state from the OS.

Regtested on x86_64-pc-linux-gnu, Ok for trunk?

gcc/fortran/ChangeLog:

2019-08-13  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/91414
	* check.c (gfc_check_random_seed): Reduce seed_size.
	* intrinsic.texi (RANDOM_NUMBER): Update to match new PRNG.

gcc/testsuite/ChangeLog:

2019-08-13  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/91414
	* gfortran.dg/random_seed_1.f90: Update to match new seed size.

libgfortran/ChangeLog:

2019-08-13  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/91414
	* intrinsics/random.c (prng_state): Update state struct.
	(master_state): Update to match new size.
	(get_rand_state): Update to match new PRNG.
	(rotl): New function.
	(xorshift1024star): Replace with prng_next.
	(prng_next): New function.
	(jump): Update for new PRNG.
	(lcg_parkmiller): Replace with splitmix64.
	(splitmix64): New function.
	(getosrandom): Fix return value, simplify.
	(init_rand_state): Use getosrandom only to get 8 bytes, splitmix64
	to fill rest of state.
	(random_r4): Update to new function and struct names.
	(random_r8): Likewise.
	(random_r10): Likewise.
	(random_r16): Likewise.
	(arandom_r4): Liekwise.
	(arandom_r8): Likewise.
	(arandom_r10): Likwewise.
	(arandom_r16): Likewise.
	(xor_keys): Reduce size to match new PRNG.
	(random_seed_i4): Update to new function and struct names, remove
	special handling of variable p used in previous PRNG.
	(random_seed_i8): Likewise.

From-SVN: r274361

In my original patch to fix PR 53796 I forgot to fix the behavior for
unconnected units when inquiring via filename. This patch fixes that.

Regtested on x86_64-pc-linux-gnu, committed as obvious.

libgfortran/ChangeLog:

2019-08-07  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/53796
	* io/inquire.c (inquire_via_filename): Set recl to -1 for
	unconnected units.

gcc/testsuite/ChangeLog:

2019-08-07  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/53796
	* gfortran.dg/inquire_recl_f2018.f90: Test for unconnected unit
	with inquire via filename.

From-SVN: r274160

2019-07-21  Thomas König  <tkoenig@gcc.gnu.org>

	PR libfortran/91030
	* gfortran.texi (GFORTRAN_FORMATTED_BUFFER_SIZE): Document
	(GFORTRAN_UNFORMATTED_BUFFER_SIZE): Likewise.

2019-07-21  Thomas König  <tkoenig@gcc.gnu.org>

	PR libfortran/91030
	* io/unix.c (BUFFER_SIZE): Delete.
	(BUFFER_FORMATTED_SIZE_DEFAULT): New variable.
	(BUFFER_UNFORMATTED_SIZE_DEFAULT): New variable.
	(unix_stream): Add buffer_size.
	(buf_read): Use s->buffer_size instead of BUFFER_SIZE.
	(buf_write): Likewise.
	(buf_init): Add argument unformatted.  Handle block sizes
	for unformatted vs. formatted, using defaults if provided.
	(fd_to_stream): Add argument unformatted in call to buf_init.
	* libgfortran.h (options_t): Add buffer_size_formatted and
	buffer_size_unformatted.
	* runtime/environ.c (variable_table): Add
	GFORTRAN_UNFORMATTED_BUFFER_SIZE and
	GFORTRAN_FORMATTED_BUFFER_SIZE.

From-SVN: r273643

2019-06-25  Kwok Cheung Yeung  <kcy@codesourcery.com>
            Andrew Stubbs  <ams@codesourcery.com>

	libgfortran/
	* configure: Regenerate.
	* configure.ac (LIBGFOR_MINIMAL): Do not use on AMD GCN.

Co-Authored-By: Andrew Stubbs <ams@codesourcery.com>

From-SVN: r272649

2019-06-14  Janne Blomqvist  <jb@gcc.gnu.org>

        PR fortran/65921
        * runtime/memory.c (SIZE_MAX):Remove macro definition.
        (xmallocarray): Use __builtin_mul_overflow.

From-SVN: r272520

As GCC now provides builtins for doing integer overflow checking, lets
use it when checking for overflow in xmallocarray.

Regtested on x86_64-pc-linux-gnu.

libgfortran/ChangeLog:

2019-06-14  Janne Blomqvist  <jb@gcc.gnu.org>

	* runtime/memory.c (SIZE_MAX):Remove macro definition.
	(xmallocarray): Use __builtin_mul_overflow.

From-SVN: r272295

gcc/fortran ChangeLog:

2019-05-22  Jeff Law  <law@redhat.com>
            Mark Eggleston  <mark.eggleston@codethink.com>

        PR fortran/89100
        * gfortran.texi: Add Default widths for F, G and I format
        descriptors to Extensions section.
        * invoke.texi: Add -fdec-format-defaults
        * io.c (check_format): Use default widths for i, f and g when
        flag_dec_format_defaults is enabled.
        * lang.opt: Add new option.
        * options.c (set_dec_flags): Add SET_BITFLAG for
        flag_dec_format_defaults.


gcc/testsuite ChangeLog:

2019-05-22  Mark Eggleston  <mark.eggleston@codethink.com>

        PR fortran/89100
        * gfortran.dg/fmt_f_default_field_width_1.f90: New test.
        * gfortran.dg/fmt_f_default_field_width_2.f90: New test.
        * gfortran.dg/fmt_f_default_field_width_3.f90: New test.
        * gfortran.dg/fmt_g_default_field_width_1.f90: New test.
        * gfortran.dg/fmt_g_default_field_width_2.f90: New test.
        * gfortran.dg/fmt_g_default_field_width_3.f90: New test.
        * gfortran.dg/fmt_i_default_field_width_1.f90: New test.
        * gfortran.dg/fmt_i_default_field_width_2.f90: New test.
        * gfortran.dg/fmt_i_default_field_width_3.f90: New test.


libgfortran ChangeLog:

2019-05-22  Jeff Law  <law@redhat.com>

        PR fortran/89100
        * io/format.c (parse_format_list): set default width when the
        IOPARM_DT_DEC_EXT flag is set for i, f and g.
        * io/io.h: add default_width_for_integer, default_width_for_float
        and default_precision_for_float.
        * io/write.c (write_boz): extra parameter giving length of data
        corresponding to the type's kind.
        (write_b): pass data length as extra parameter in calls to
        write_boz.
        (write_o): pass data length as extra parameter in calls to
        write_boz.
        (write_z): pass data length as extra parameter in calls to
        write_boz.
        (size_from_kind): also set size is default width is set.
        * io/write_float.def (build_float_string): new paramter inserted
        before result parameter. If default width use values passed
        instead of the values in fnode.
        (FORMAT_FLOAT): macro modified to check for default width and
        calls to build_float_string to pass in default width.
        (get_float_string): set width and precision to defaults when
        needed.

From-SVN: r271511

When using posix_spawn or fork to launch a child process, the parent
needs to wait for the child, otherwise the dead child is left as a
zombie process. For this purpose one can install a signal handler for
SIGCHLD.

2019-05-19  Janne Blomqvist  <jb@gcc.gnu.org>

	PR libfortran/90038
	* intrinsics/execute_command_line (sigchld_handler): New function.
        (execute_command_line): Install handler for SIGCHLD.
        * configure.ac: Check for presence of sigaction and waitpid.
        * config.h.in: Regenerated.
        * configure: Regenerated.

Regtested on x86_64-pc-linux-gnu.

From-SVN: r271384

    
fork() semantics can be problematic.  Most unix style OS'es have
posix_spawn which can be used to replace fork + exec in many cases.
For more information see
e.g. https://www.microsoft.com/en-us/research/uploads/prod/2019/04/fork-hotos19.pdf
    
This replaces the one use of fork in libgfortran with posix_spawn.
    
2019-05-17  Janne Blomqvist  <jb@gcc.gnu.org>

        PR libfortran/90038
        * configure.ac (AC_CHECK_FUNCS_ONCE): Check for posix_spawn.
        * intrinsics/execute_command_line (execute_command_line): Use
        posix_spawn.
        * Makefile.in: Regenerated.
        * config.h.in: Regenerated.
        * configure: Regenerated.
    
Regtested on x86_64-pc-linux-gnu.

From-SVN: r271340

	PR fortran/54613
	* gfortran.map (GFORTRAN_9.2): Export _gfortran_{,m,s}findloc{0,1}_r10.
	* Makefile.am (i_findloc0_c): Add $(srcdir)/generated/findloc0_r10.c.
	(i_findloc1_c): Add $(srcdir)/generated/findloc1_r10.c.
	* Makefile.in: Regenerated.
	* generated/findloc0_r10.c: Generated.
	* generated/findloc1_r10.c: Generated.

From-SVN: r271336

	PR fortran/54613
	* gfortran.map (GFORTRAN_9.2): Export _gfortran_{,m,s}findloc{0,1}_r10.
	* Makefile.am (i_findloc0_c): Add $(srcdir)/generated/findloc0_r10.c.
	(i_findloc1_c): Add $(srcdir)/generated/findloc1_r10.c.
	* Makefile.in: Regenerated.
	* generated/findloc0_r10.c: Generated.
	* generated/findloc1_r10.c: Generated.

From-SVN: r271335

	PR fortran/54613
	* gfortran.map (GFORTRAN_9.2): New symbol version, export
	_gfortran_{,m,s}findloc0_i2 in it.

From-SVN: r271334

As of Fortran 2018 it's allowed to open the same file on multiple
units.

libgfortran/ChangeLog:

2019-05-15  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/90461
        * io/open.c (new_unit): Don't check if the file is already open
	for F2018.

testsuite/ChangeLog:

2019-05-15  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/90461
        * gfortran.dg/open_errors_2.f90: Add -std=f2008, adjust line number.
	* gfortran.dg/open_errors_3.f90: New test.

From-SVN: r271260

	* Makefile.am (gfor_cdir): Remove $(MULTISUBDIR).
	* Makefile.in: Regenerated.

From-SVN: r270793

2019-04-14  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/89843
	* trans-decl.c (gfc_get_symbol_decl): Assumed shape and assumed
	rank dummies of bind C procs require deferred initialization.
	(convert_CFI_desc): New procedure to convert incoming CFI
	descriptors to gfc types and back again.
	(gfc_trans_deferred_vars): Call it.
	* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Null the CFI
	descriptor pointer. Free the descriptor in all cases.

	PR fortran/89846
	* expr.c (is_CFI_desc): New function.
	(is_subref_array): Tidy up by referencing the symbol directly.
	* gfortran.h : Prototype for is_CFI_desc.
	* trans_array.c (get_CFI_desc): New function.
	(gfc_get_array_span, gfc_conv_scalarized_array_ref,
	gfc_conv_array_ref): Use it.
	* trans.c (get_array_span): Extract the span from descriptors
	that are indirect references.

	PR fortran/90022
	* trans-decl.c (gfc_get_symbol_decl): Make sure that the se
	expression is a pointer type before converting it to the symbol
	backend_decl type.
	* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Eliminate
	temporary creation for intent(in).

2019-04-14  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/89843
	* gfortran.dg/ISO_Fortran_binding_4.f90: Modify the value of x
	in ctg. Test the conversion of the descriptor types in the main
	program.
	* gfortran.dg/ISO_Fortran_binding_10.f90: New test.
	* gfortran.dg/ISO_Fortran_binding_10.c: Called by it.

	PR fortran/89846
	* gfortran.dg/ISO_Fortran_binding_11.f90: New test.
	* gfortran.dg/ISO_Fortran_binding_11.c: Called by it.

	PR fortran/90022
	* gfortran.dg/ISO_Fortran_binding_1.c: Correct the indexing for
	the computation of 'ans'. Also, change the expected results for
	CFI_is_contiguous to comply with standard.
	* gfortran.dg/ISO_Fortran_binding_1.f90: Correct the expected
	results for CFI_is_contiguous to comply with standard.
	* gfortran.dg/ISO_Fortran_binding_9.f90: New test.
	* gfortran.dg/ISO_Fortran_binding_9.c: Called by it.

2019-04-14  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/89843
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Only
	return immediately if the source pointer is null. Bring
	forward the extraction of the gfc type. Extract the kind so
	that the element size can be correctly computed for sections
	and components of derived type arrays. Remove the free of the
	CFI descriptor since this is now done in trans-expr.c.
	(gfc_desc_to_cfi_desc): Only allocate the CFI descriptor if it
	is not null.
	(CFI_section): Normalise the difference between the upper and
	lower bounds by the stride to correctly calculate the extents
	of the section.

	PR fortran/89846
	* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Use
	the stride measure for the gfc span if it is not a multiple
	of the element length. Otherwise use the element length.

	PR fortran/90022
	* runtime/ISO_Fortran_binding.c (CFI_is_contiguous) : Return
	1 for true and 0 otherwise to comply with the standard. Correct
	the contiguity check for rank 3 and greater by using the stride
	measure of the lower dimension rather than the element length.

From-SVN: r270353

	PR libgfortran/79540
	* io/write_float.def (build_float_string): Don't copy digits when
	ndigits is negative.

From-SVN: r269911

re PR libfortran/89593 (warning "passing argument 3 of ‘_gfortran_caf_{get,send}_by_ref’ from incompatible pointer type" when building libgfortran)

	PR libgfortran/89593
	* caf/single.c (_gfortran_caf_sendget_by_ref): Cast &temp to
	gfc_descriptor_t * to avoid warning.

From-SVN: r269405

	* io/transfer.c (transfer_array_inner): Do not
	cast charlen to index_type.

From-SVN: r269224