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Using and Porting GNU Fortran

15.3 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.)

GNU Fortran language:

15.3.1 Better Source Model
15.3.2 Fortran 90 Support
15.3.3 Intrinsics in PARAMETER Statements
15.3.4 Arbitrary Concatenation
15.3.5 SELECT CASE on CHARACTER Type
15.3.6 RECURSIVE Keyword
15.3.8 Popular Non-standard Types
15.3.9 Full Support for Compiler Types
15.3.10 Array Bounds Expressions
15.3.11 POINTER Statements
15.3.12 Sensible Non-standard Constructs
15.3.13 READONLY Keyword
15.3.14 FLUSH Statement
15.3.15 Expressions in FORMAT Statements
15.3.16 Explicit Assembler Code
15.3.17 Q Edit Descriptor

GNU Fortran dialects:

15.3.18 Old-style PARAMETER Statements
15.3.19 TYPE and ACCEPT I/O Statements
15.3.20 STRUCTURE, UNION, RECORD, MAP
15.3.21 OPEN, CLOSE, and INQUIRE Keywords
15.3.22 ENCODE and DECODE
15.3.23 AUTOMATIC Statement
15.3.24 Suppressing Space Padding of Source Lines
15.3.25 Fortran Preprocessor
15.3.26 Bit Operations on Floating-point Data
15.3.27 Really Ugly Character Assignments

New facilities:

15.3.28 POSIX Standard
15.3.29 Floating-point Exception Handling
15.3.30 Nonportable Conversions
15.3.31 Large Automatic Arrays
15.3.32 Support for Threads
15.3.7 Increasing Precision/Range
15.3.33 Enabling Debug Lines

Better diagnostics:

15.3.34 Better Warnings
15.3.35 Gracefully Handle Sensible Bad Code
15.3.36 Non-standard Conversions
15.3.37 Non-standard Intrinsics
15.3.38 Modifying DO Variable
15.3.39 Better Pedantic Compilation
15.3.40 Warn About Implicit Conversions
15.3.41 Invalid Use of Hollerith Constant
15.3.42 Dummy Array Without Dimensioning Dummy
15.3.43 Invalid FORMAT Specifiers
15.3.44 Ambiguous Dialects
15.3.45 Unused Labels
15.3.46 Informational Messages

Run-time facilities:

15.3.47 Uninitialized Variables at Run Time
15.3.48 Portable Unformatted Files
15.3.49 Better List-directed I/O
15.3.50 Default to Console I/O

Debugging:

15.3.51 Labels Visible to Debugger