g77.info: Missing Features

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Missing Features

   This section lists features we know are missing from `g77', and
which we want to add someday.  (There is no priority implied in the
ordering below.)

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GNU Fortran language:
Better Source Model
Fortran 90 Support
Intrinsics in PARAMETER Statements
Arbitrary Concatenation
SELECT CASE on CHARACTER Type
RECURSIVE Keyword
Popular Non-standard Types
Full Support for Compiler Types
Array Bounds Expressions
POINTER Statements
Sensible Non-standard Constructs
READONLY Keyword
FLUSH Statement
Expressions in FORMAT Statements
Explicit Assembler Code
Q Edit Descriptor
  
GNU Fortran dialects:
Old-style PARAMETER Statements
TYPE and ACCEPT I/O Statements
STRUCTURE UNION RECORD MAP
OPEN CLOSE and INQUIRE Keywords
ENCODE and DECODE
AUTOMATIC Statement
Suppressing Space Padding
Fortran Preprocessor
Bit Operations on Floating-point Data
Really Ugly Character Assignments
  
New facilities:
POSIX Standard
Floating-point Exception Handling
Nonportable Conversions
Large Automatic Arrays
Support for Threads
Increasing Precision/Range
Enabling Debug Lines
  
Better diagnostics:
Better Warnings
Gracefully Handle Sensible Bad Code
Non-standard Conversions
Non-standard Intrinsics
Modifying DO Variable
Better Pedantic Compilation
Warn About Implicit Conversions
Invalid Use of Hollerith Constant
Dummy Array Without Dimensioning Dummy
Invalid FORMAT Specifiers
Ambiguous Dialects
Unused Labels
Informational Messages
  
Run-time facilities:
Uninitialized Variables at Run Time
Portable Unformatted Files
Better List-directed I/O
Default to Console I/O
  
Debugging:
Labels Visible to Debugger