-@c Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+@c Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
@c Free Software Foundation, Inc.
@c This is part of the GNU Fortran manual.
@c For copying conditions, see the file gfortran.texi.
@c man begin DESCRIPTION
The @command{gfortran} command supports all the options supported by the
-@command{gcc} command. Only options specific to GNU Fortran are documented here.
+@command{gcc} command. Only options specific to GNU Fortran are documented
+here.
@xref{Invoking GCC,,GCC Command Options,gcc,Using the GNU Compiler
Collection (GCC)}, for information
@table @emph
@item Fortran Language Options
@xref{Fortran Dialect Options,,Options controlling Fortran dialect}.
-@gccoptlist{-fall-intrinsics -ffree-form -fno-fixed-form @gol
--fdollar-ok -fimplicit-none -fmax-identifier-length @gol
--std=@var{std} -fd-lines-as-code -fd-lines-as-comments @gol
--ffixed-line-length-@var{n} -ffixed-line-length-none @gol
--ffree-line-length-@var{n} -ffree-line-length-none @gol
--fdefault-double-8 -fdefault-integer-8 -fdefault-real-8 @gol
--fcray-pointer -fopenmp -fno-range-check -fbackslash -fmodule-private}
+@gccoptlist{-fall-intrinsics -fbackslash -fcray-pointer -fd-lines-as-code @gol
+-fd-lines-as-comments -fdefault-double-8 -fdefault-integer-8 @gol
+-fdefault-real-8 -fdollar-ok -ffixed-line-length-@var{n} @gol
+-ffixed-line-length-none -ffree-form -ffree-line-length-@var{n} @gol
+-ffree-line-length-none -fimplicit-none -finteger-4-integer-8 @gol
+-fmax-identifier-length -fmodule-private -fno-fixed-form -fno-range-check @gol
+-fopenmp -freal-4-real-10 -freal-4-real-16 -freal-4-real-8 @gol
+-freal-8-real-10 -freal-8-real-16 -freal-8-real-4 -std=@var{std}
+}
@item Preprocessing Options
@xref{Preprocessing Options,,Enable and customize preprocessing}.
-@gccoptlist{-cpp -dD -dI -dM -dN -dU -fworking-directory @gol
--imultilib @var{dir} -iprefix @var{file} -isysroot @var{dir} @gol
--iquote -isystem @var{dir} -nocpp -nostdinc -undef @gol
--A@var{question}=@var{answer} -A-@var{question}@r{[}=@var{answer}@r{]} @gol
--C -CC -D@var{macro}@r{[}=@var{defn}@r{]} -U@var{macro} -H -P}
+@gccoptlist{-A-@var{question}@r{[}=@var{answer}@r{]}
+-A@var{question}=@var{answer} -C -CC -D@var{macro}@r{[}=@var{defn}@r{]}
+-H -P @gol
+-U@var{macro} -cpp -dD -dI -dM -dN -dU -fworking-directory
+-imultilib @var{dir} @gol
+-iprefix @var{file} -iquote -isysroot @var{dir} -isystem @var{dir} -nocpp
+-nostdinc @gol
+-undef
+}
@item Error and Warning Options
@xref{Error and Warning Options,,Options to request or suppress errors
and warnings}.
-@gccoptlist{-fmax-errors=@var{n}
--fsyntax-only -pedantic -pedantic-errors -Wall @gol
--Waliasing -Wampersand -Warray-bounds -Wcharacter-truncation @gol
--Wconversion -Wimplicit-interface -Wimplicit-procedure -Wline-truncation @gol
--Wintrinsics-std -Wreal-q-constant -Wsurprising -Wno-tabs -Wunderflow @gol
--Wunused-parameter -Wintrinsic-shadow -Wno-align-commons @gol
--Wfunction-elimination}
+@gccoptlist{-Waliasing -Wall -Wampersand -Warray-bounds
+-Wcharacter-truncation @gol
+-Wconversion -Wfunction-elimination -Wimplicit-interface @gol
+-Wimplicit-procedure -Wintrinsic-shadow -Wintrinsics-std @gol
+-Wline-truncation -Wno-align-commons -Wno-tabs -Wreal-q-constant @gol
+-Wsurprising -Wunderflow -Wunused-parameter -fmax-errors=@var{n}
+-fsyntax-only @gol
+-pedantic -pedantic-errors
+}
@item Debugging Options
@xref{Debugging Options,,Options for debugging your program or GNU Fortran}.
-@gccoptlist{-fdump-fortran-original -fdump-fortran-optimized @gol
--ffpe-trap=@var{list} -fbacktrace -fdump-parse-tree}
+@gccoptlist{-fbacktrace -fdump-fortran-optimized -fdump-fortran-original @gol
+-fdump-parse-tree -ffpe-trap=@var{list}
+}
@item Directory Options
@xref{Directory Options,,Options for directory search}.
@item Runtime Options
@xref{Runtime Options,,Options for influencing runtime behavior}.
-@gccoptlist{-fconvert=@var{conversion} -fno-range-check
--frecord-marker=@var{length} @gol -fmax-subrecord-length=@var{length}
--fsign-zero}
+@gccoptlist{-fconvert=@var{conversion} -fmax-subrecord-length=@var{length}
+-fno-range-check @gol
+-frecord-marker=@var{length} -fsign-zero
+}
@item Code Generation Options
@xref{Code Gen Options,,Options for code generation conventions}.
-@gccoptlist{-fno-automatic -ff2c -fno-underscoring @gol
--fno-whole-file -fsecond-underscore @gol
--fbounds-check -fcheck-array-temporaries -fmax-array-constructor =@var{n} @gol
+@gccoptlist{-faggressive-function-elimination -fblas-matmul-limit=@var{n} @gol
+-fbounds-check -fcheck-array-temporaries @gol
-fcheck=@var{<all|array-temps|bounds|do|mem|pointer|recursion>} @gol
--fcoarray=@var{<none|single|lib>} -fmax-stack-var-size=@var{n} @gol
--fstack-arrays @gol
--fpack-derived -frepack-arrays -fshort-enums -fexternal-blas @gol
--fblas-matmul-limit=@var{n} -frecursive -finit-local-zero @gol
--finit-integer=@var{n} -finit-real=@var{<zero|inf|-inf|nan|snan>} @gol
--finit-logical=@var{<true|false>} -finit-character=@var{n} @gol
--fno-align-commons -fno-protect-parens -frealloc-lhs @gol
--faggressive-function-elimination -ffrontend-optimize}
+-fcoarray=@var{<none|single|lib>} -fexternal-blas -ff2c
+-ffrontend-optimize @gol
+-finit-character=@var{n} -finit-integer=@var{n} -finit-local-zero @gol
+-finit-logical=@var{<true|false>}
+-finit-real=@var{<zero|inf|-inf|nan|snan>} @gol
+-fmax-array-constructor=@var{n} -fmax-stack-var-size=@var{n}
+-fno-align-commons @gol
+-fno-automatic -fno-protect-parens -fno-underscoring -fno-whole-file @gol
+-fsecond-underscore -fpack-derived -frealloc-lhs -frecursive @gol
+-frepack-arrays -fshort-enums -fstack-arrays
+}
@end table
-@menu
-* Fortran Dialect Options:: Controlling the variant of Fortran language
- compiled.
-* Preprocessing Options:: Enable and customize preprocessing.
-* Error and Warning Options:: How picky should the compiler be?
-* Debugging Options:: Symbol tables, measurements, and debugging dumps.
-* Directory Options:: Where to find module files
-* Link Options :: Influencing the linking step
-* Runtime Options:: Influencing runtime behavior
-* Code Gen Options:: Specifying conventions for function calls, data layout
- and register usage.
-@end menu
-
@node Fortran Dialect Options
@section Options controlling Fortran dialect
@cindex dialect options
@code{IMPLICIT} statements. This is the equivalent of adding
@code{implicit none} to the start of every procedure.
+@item -finteger-4-integer-8
+@opindex @code{finteger-4-integer-8}
+Promote all @code{INTEGER(KIND=4)} entities to an @code{INTEGER(KIND=8)}
+entities. If @code{KIND=8} is unavailable, then an error will be issued.
+This option should be used with care and may not be suitable for your codes.
+Areas of possible concern include calls to external procedures,
+alignment in @code{EQUIVALENCE} and/or @code{COMMON}, generic interfaces,
+BOZ literal constant conversion, and I/O. Inspection of the intermediate
+representation of the translated Fortran code, produced by
+@option{-fdump-tree-original}, is suggested.
+
@item -fcray-pointer
@opindex @code{fcray-pointer}
Enable the Cray pointer extension, which provides C-like pointer
on most systems, but with @option{-fno-range-check} the value will
``wrap around'' and @code{i} will be initialized to @math{-1} instead.
+@item -freal-4-real-8
+@itemx -freal-4-real-10
+@itemx -freal-8-real-4
+@itemx -freal-8-real-10
+@itemx -freal-8-real-16
+@opindex @code{freal-4-real-8}
+@opindex @code{freal-4-real-10}
+@opindex @code{freal-4-real-16}
+@opindex @code{freal-8-real-4}
+@opindex @code{freal-8-real-10}
+@opindex @code{freal-8-real-16}
+@cindex options, real kind type promotion
+Promote all @code{REAL(KIND=M)} entities to @code{REAL(KIND=N)} entities.
+If @code{REAL(KIND=N)} is unavailable, then an error will be issued.
+All other real kind types are unaffected by this option.
+These options should be used with care and may not be suitable for your
+codes. Areas of possible concern include calls to external procedures,
+alignment in @code{EQUIVALENCE} and/or @code{COMMON}, generic interfaces,
+BOZ literal constant conversion, and I/O. Inspection of the intermediate
+representation of the translated Fortran code, produced by
+@option{-fdump-tree-original}, is suggested.
+
@item -std=@var{std}
@opindex @code{std=}@var{std} option
Specify the standard to which the program is expected to conform, which
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