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Using and Porting GNU Fortran

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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  


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