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+<!--
+Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
+
+This file is processed by the bin/SConsDoc.py module.
+See its __doc__ string for a discussion of the format.
+-->
+<tool name="f90">
+<summary>
+Set construction variables for generic POSIX Fortran 90 compilers.
+</summary>
+<sets>
+F90
+F90FLAGS
+F90COM
+F90PPCOM
+SHF90
+SHF90FLAGS
+SHF90COM
+SHF90PPCOM
+_F90INCFLAGS
+</sets>
+<uses>
+F90COMSTR
+F90PPCOMSTR
+SHF90COMSTR
+SHF90PPCOMSTR
+</uses>
+</tool>
+
+<cvar name="F90">
+<summary>
+The Fortran 90 compiler.
+You should normally set the &cv-link-FORTRAN; variable,
+which specifies the default Fortran compiler
+for all Fortran versions.
+You only need to set &cv-link-F90; if you need to use a specific compiler
+or compiler version for Fortran 90 files.
+</summary>
+</cvar>
+
+<cvar name="F90COM">
+<summary>
+The command line used to compile a Fortran 90 source file to an object file.
+You only need to set &cv-link-F90COM; if you need to use a specific
+command line for Fortran 90 files.
+You should normally set the &cv-link-FORTRANCOM; variable,
+which specifies the default command line
+for all Fortran versions.
+</summary>
+</cvar>
+
+<cvar name="F90COMSTR">
+<summary>
+The string displayed when a Fortran 90 source file
+is compiled to an object file.
+If this is not set, then &cv-link-F90COM; or &cv-link-FORTRANCOM;
+(the command line) is displayed.
+</summary>
+</cvar>
+
+<cvar name="F90FILESUFFIXES">
+<summary>
+The list of file extensions for which the F90 dialect will be used. By
+default, this is ['.f90']
+</summary>
+</cvar>
+
+<cvar name="F90PPFILESUFFIXES">
+<summary>
+The list of file extensions for which the compilation + preprocessor pass for
+F90 dialect will be used. By default, this is empty
+</summary>
+</cvar>
+
+<cvar name="F90FLAGS">
+<summary>
+General user-specified options that are passed to the Fortran 90 compiler.
+Note that this variable does
+<emphasis>not</emphasis>
+contain
+<option>-I</option>
+(or similar) include search path options
+that scons generates automatically from &cv-link-F90PATH;.
+See
+&cv-link-_F90INCFLAGS;
+below,
+for the variable that expands to those options.
+You only need to set &cv-link-F90FLAGS; if you need to define specific
+user options for Fortran 90 files.
+You should normally set the &cv-link-FORTRANFLAGS; variable,
+which specifies the user-specified options
+passed to the default Fortran compiler
+for all Fortran versions.
+</summary>
+</cvar>
+
+<cvar name="_F90INCFLAGS">
+<summary>
+An automatically-generated construction variable
+containing the Fortran 90 compiler command-line options
+for specifying directories to be searched for include files.
+The value of &cv-link-_F90INCFLAGS; is created
+by appending &cv-link-INCPREFIX; and &cv-link-INCSUFFIX;
+to the beginning and end
+of each directory in &cv-link-F90PATH;.
+</summary>
+</cvar>
+
+<cvar name="F90PATH">
+<summary>
+The list of directories that the Fortran 90 compiler will search for include
+directories. The implicit dependency scanner will search these
+directories for include files. Don't explicitly put include directory
+arguments in &cv-link-F90FLAGS; because the result will be non-portable
+and the directories will not be searched by the dependency scanner. Note:
+directory names in &cv-link-F90PATH; will be looked-up relative to the SConscript
+directory when they are used in a command. To force
+&scons;
+to look-up a directory relative to the root of the source tree use #:
+You only need to set &cv-link-F90PATH; if you need to define a specific
+include path for Fortran 90 files.
+You should normally set the &cv-link-FORTRANPATH; variable,
+which specifies the include path
+for the default Fortran compiler
+for all Fortran versions.
+
+<example>
+env = Environment(F90PATH='#/include')
+</example>
+
+The directory look-up can also be forced using the
+&Dir;()
+function:
+
+<example>
+include = Dir('include')
+env = Environment(F90PATH=include)
+</example>
+
+The directory list will be added to command lines
+through the automatically-generated
+&cv-link-_F90INCFLAGS;
+construction variable,
+which is constructed by
+appending the values of the
+&cv-link-INCPREFIX; and &cv-link-INCSUFFIX;
+construction variables
+to the beginning and end
+of each directory in &cv-link-F90PATH;.
+Any command lines you define that need
+the F90PATH directory list should
+include &cv-link-_F90INCFLAGS;:
+
+<example>
+env = Environment(F90COM="my_compiler $_F90INCFLAGS -c -o $TARGET $SOURCE")
+</example>
+</summary>
+</cvar>
+
+<cvar name="F90PPCOM">
+<summary>
+The command line used to compile a Fortran 90 source file to an object file
+after first running the file through the C preprocessor.
+Any options specified in the &cv-link-F90FLAGS; and &cv-link-CPPFLAGS; construction variables
+are included on this command line.
+You only need to set &cv-link-F90PPCOM; if you need to use a specific
+C-preprocessor command line for Fortran 90 files.
+You should normally set the &cv-link-FORTRANPPCOM; variable,
+which specifies the default C-preprocessor command line
+for all Fortran versions.
+</summary>
+</cvar>
+
+<cvar name="F90PPCOMSTR">
+<summary>
+The string displayed when a Fortran 90 source file
+is compiled after first running the file through the C preprocessor.
+If this is not set, then &cv-link-F90PPCOM; or &cv-link-FORTRANPPCOM;
+(the command line) is displayed.
+</summary>
+</cvar>
+
+<cvar name="SHF90">
+<summary>
+The Fortran 90 compiler used for generating shared-library objects.
+You should normally set the &cv-link-SHFORTRAN; variable,
+which specifies the default Fortran compiler
+for all Fortran versions.
+You only need to set &cv-link-SHF90; if you need to use a specific compiler
+or compiler version for Fortran 90 files.
+</summary>
+</cvar>
+
+<cvar name="SHF90COM">
+<summary>
+The command line used to compile a Fortran 90 source file
+to a shared-library object file.
+You only need to set &cv-link-SHF90COM; if you need to use a specific
+command line for Fortran 90 files.
+You should normally set the &cv-link-SHFORTRANCOM; variable,
+which specifies the default command line
+for all Fortran versions.
+</summary>
+</cvar>
+
+<cvar name="SHF90COMSTR">
+<summary>
+The string displayed when a Fortran 90 source file
+is compiled to a shared-library object file.
+If this is not set, then &cv-link-SHF90COM; or &cv-link-SHFORTRANCOM;
+(the command line) is displayed.
+</summary>
+</cvar>
+
+<cvar name="SHF90FLAGS">
+<summary>
+Options that are passed to the Fortran 90 compiler
+to generated shared-library objects.
+You only need to set &cv-link-SHF90FLAGS; if you need to define specific
+user options for Fortran 90 files.
+You should normally set the &cv-link-SHFORTRANFLAGS; variable,
+which specifies the user-specified options
+passed to the default Fortran compiler
+for all Fortran versions.
+</summary>
+</cvar>
+
+<cvar name="SHF90PPCOM">
+<summary>
+The command line used to compile a Fortran 90 source file to a
+shared-library object file
+after first running the file through the C preprocessor.
+Any options specified in the &cv-link-SHF90FLAGS; and &cv-link-CPPFLAGS; construction variables
+are included on this command line.
+You only need to set &cv-link-SHF90PPCOM; if you need to use a specific
+C-preprocessor command line for Fortran 90 files.
+You should normally set the &cv-link-SHFORTRANPPCOM; variable,
+which specifies the default C-preprocessor command line
+for all Fortran versions.
+</summary>
+</cvar>
+
+<cvar name="SHF90PPCOMSTR">
+<summary>
+The string displayed when a Fortran 90 source file
+is compiled to a shared-library object file
+after first running the file through the C preprocessor.
+If this is not set, then &cv-link-SHF90PPCOM; or &cv-link-SHFORTRANPPCOM;
+(the command line) is displayed.
+</summary>
+</cvar>