asn1c -- the ASN.1 Compiler
asn1c [-E [-F] | -P | -R]
[-Sdir] [-X]
[-Wdebug-...] [-foption]
[-gen-option]
[-pdu={all|auto|Type}]
[-print-option]
input-filenames...
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.
- -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.
- -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.
- -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).
- -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.
- -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.
Lev Walkin <vlm@lionet.info>.