Awkcc

Awkcc is a preprocessor that translates AWK code into C, which is subsequently compiled using GCC.

Compilable Fork of Nokia Release

2022-01-10 I sat on this repo as private for sometime as I had located the source a year back and had it compiling. Reaching out to individuals at Nokia/Bell they were unsure if anybody cared if it was released, but couldn't gaurantee anything legally... nonetheless it appears on 2022-01-05 Nokia finally released the source themselves. I've maintained the two directories 1988 and 2011 as released by Nokia; but added in all the directories my source copy had along with the slight compiler-related modifications detailed below.

Requirements

Yacc is required to build. With apt, install it with apt install bison

Compilation

Build in Linux

Build: make awkcc TYPE=darwin CC=gcc

Clean: make force

Build in MinGW (MSys)

Build: make awkcc TYPE=cygwin CC=gcc CFLAGS="-D__CYGWIN__ -DWIN_NUL_DEV"

Clean: make force

It is neccessary to define CYGWIN or else the compiler will compile a different implementation of the function awkerr in awkerr.c, which relies on _doprnt, which is non-portable (no POSIX, no ANSI/ISO C).

See the Makefile for other build type parameters (solaris, hppa).

After building, make will create three files worth noting:

• The executable 'awkcc' in awkcc20/awkcc
• The script 'awkcc.sh' in awkcc20/awkcc
• The library 'libAWK.a' in awkcc20/lib

You will need to edit awkcc.sh HEADERDIR and AWKLIB variables (at the top of the script) to where you ultimately install libAWK.a and the header files on your system. You only need to install the headers in ./include ({awk,dollars,ear,hash,header,specassign,y.tab}.h)

Usage

awkcc -o nwc -c nwc.c nwc.awk

awkcc will automatically call awkcc.sh, a shell script for compiling the resulting .c file. It may require hand-tuning based on your include and library paths, but is pretty straight forward.

Alternatively if want to compile the outputted .c manually you can do so with:

gcc -I../include -o nwc nwc.c libAWK.a -lm

Note the order of statements matter; libAWK.a must come after *.c

Minor Commit Changes to Original Bell Labs Source

These were the minor changes in the source to allow it to compile. (for those interested).

[Added to awkrun.c]

To allow execution in Windows through MinGW, it is neccessary to have an alternate to /dev/null

#ifdef WIN_NUL_DEV
in=fopen("nul", "r");
if(in==NULL)
	fprintf(stderr,"Could not open nul for reading.\n");
#else
in=fopen("/dev/null", "r");
if(in==NULL)
	fprintf(stderr,"Could not open /dev/null for reading.\n");	
#endif

[Changed in main.c]

Nodep yyparse();
 -to-
int yyparse();