NAME

       asn1c -- the ASN.1 Compiler

SYNOPSIS

       asn1c [-E [-F] | -P | -R]
       [-Sdir] [-X]
       [-Wdebug-...] [-foption] [-gen-option] [-pdu={all|auto|Type}]
       [-print-option]
       input-filenames...

DESCRIPTION

       asn1c  compiles ASN.1 specifications into a set of target language (C/C++) encoders and decoders for BER,
       DER, PER, XER and other encoding rules.

OPTIONS

   Stage Selection Options
       -E     Run the parsing stage only.  Print the reconstructed ASN.1 text.

       -F     Used together with -E, instructs the compiler to stop after the ASN.1 syntax tree fixing stage and
              dump the reconstructed ASN.1 specification to the standard output.

       -P     Dump the compiled output to the standard output instead of creating the target language  files  on
              disk.

       -R     Restrict the compiler to generate only the ASN.1 tables, omitting the usual support code.

       -S directory
              Use the specified directory with ASN.1 skeleton files.

       -X     Generate an XML DTD schema for the specified ASN.1 files.

   Warning Options
       -Werror
              Treat warnings as errors; abort if any warning is produced.

       -Wdebug-lexer
              Enable lexer debugging during the ASN.1 parsing stage.

       -Wdebug-fixer
              Enable ASN.1 syntax tree fixer debugging during the fixing stage.

       -Wdebug-compiler
              Enable debugging during the actual compile time.

   Language Options
       -fbless-SIZE
              Allow  SIZE()  constraint  for  INTEGER,  ENUMERATED, and other types for which this constraint is
              normally prohibited by the standard.  This is a violation of ASN.1 standard, and the compiler  may
              fail to produce a meaningful code.

       -fcompound-names
              Using  this  option  prevents name collisions in the target source code by using complex names for
              target language structures.  (Name collisions may occur  if  the  ASN.1  module  reuses  the  same
              identifiers in multiple contexts).

       -findirect-choice
              When generating code for a CHOICE type, compile the CHOICE members as indirect pointers instead of
              declaring  them  inline.   Consider  using  this option together with -fno-include-deps to prevent
              circular references.

       -fincludes-quoted
              Refer to header files in #includes using "double" instead of <angle> quotes.

       -fknown-extern-type=name
              Pretend the specified type is known.  The compiler will assume the target  language  source  files
              for the given type have been provided manually.

       -fline-refs
              Include ASN.1 module's line numbers in generated code comments.

       -fno-constraints
              Do not generate ASN.1 subtype constraint checking code.  This may make a shorter executable.

       -fno-include-deps
              Do  not  generate  courtesy  #include  lines  for  non-critical  type dependencies.  Helps prevent
              namespace collisions.

       -funnamed-unions
              Enable unnamed unions in the definitions of target language's structures.

       -fwide-types
              Use the unbounded size data types (INTEGER_t, ENUMERATED_t, REAL_t) by default, instead  of  using
              the native machine's data types (long, double).

   Codecs Generation Options
       -gen-PER
              Generate the Packed Encoding Rules (PER) support code.

       -pdu={all|auto|Type}
              Create a PDU table for specified types, or discover Protocol Data Units automatically.  In case of
              -pdu=all, all ASN.1 types defined in all modules will form a PDU table.  In case of -pdu=auto, all
              types  not  referenced  by  any  other  type  will  form  a  PDU  table.  If Type is an ASN.1 type
              identifier, the identifier is added to the generated PDU table.  The last form  may  be  specified
              multiple times to add any number of PDUs.

   Output Options
       -print-constraints
              When  -EF  options  are  also  specified,  this option forces the compiler to explain its internal
              understanding of subtype constraints.

       -print-lines
              Generate "-- #line" comments in -E output.

SEE ALSO

       unber(1), enber(1).

AUTHORS

       Lev Walkin <vlm@lionet.info>.

ASN.1 Compiler                                     2016-01-23                                           asn1c(1)