This log documents changes to mawk-1.3.9.1 to prepare

mawk-1.3.9.1-autoconf, with drastically-improved portability, a few bug

fixes, and removal of a bug on all Solaris systems that prevented the

test suite from passing.

At the conclusion of the effort on a large collection of about 90

physical and virtual machines at the Department of Mathematics at the

University of Utah, using numerous versions of different C compilers,

including compilers named c89, c99, cc, clang, gcc, icc, lcc, opencc,

nvcc, pcc, pgcc, and suncc, and their companion C++ compilers, mawk now

builds and validates with almost all of them. The remaining failures

can all safely be characterized as compiler bugs or compiler

limitations, none of which mawk source code can address.

The CPU platforms tested include ARM, IA-64, MIPS, PowerPC, SPARC, x86,

and x86-64. Of those, MIPS and SPARC are big endian, and the remainder

are little-endian. PowerPC can be either: on Mac OS X, it is big

endian, and on GNU/Linux CentOS 7, it is little endian.

To give an idea of the number of builds, at the time of writing this,

there are 678 logs, of which 630 report that all tests passed.

Only relatively small changes to most of the mawk code were needed to

ensure that c89 compilers can handle it (except on Solaris, where c89

does not support 64-bit integers): these were just movement of

declaration before prior executable statements, and are documented

below.

Rather more changes were needed to make the code compilable with C++

compilers. A few C++ reserved words had to be #define'd to acceptable

ones, and a fair number of old K&R-style function definitions had to be

rewritten into c89 form to be acceptable to C++ compilers. Also,

because C++ does not permit silent casts of void to non-void types, a

number of statements, notably those involving memory allocations, had to

have explicit casts added to function calls. The C++ effort was

worthwhile, because it uncovered two bugs that are now fixed, thanks to

the stricter rules that compilers for C++ enforce compared to those for

C. Also, having C++ compilability for C software can double the number

of compilers to which the code can be exposed, and that is always a good

thing in support of portable software.

Initially, autoconfiguration support was added to make it possible to

choose the compiler at build time in simultaneous builds. As more

machines were tested, it was found necessary to introduce

#include "config.h"

to just two files to get configure-time symbol definitions for use in

preprocessor statements; no compiler-supplied symbols could be used for

that job.

The original Makefile became Makefile.in, which configure then turns

into Makefile. The Makefile.in was then substantionally rewritten to

improve the easy of testing of many builds: if a log reports

SUCCESS: ALL 4 TESTS PASSED!

then it can be ignored by the developer, apart from knowing that a "make

install" on that system is now possible. A small wrapper script finds

such log files, and applies "xz -9" maximal compression to them, to the

remaining *.log files are the only ones that human needs to examine.

Testing found that on all Solaris systems, and their derivatives of

OpenIndiana, Illumos, and Hipster, log(x) for x < 0 returns -Infinity,

instead of a NaN. To remove that test failure, a bit of wrapper code

was introduced in function bi_log() in bi_funct.c to test arguments

before calling the math-library log() function. Now, the Solaris tests

all pass (except for c89 compilation, as noted above).

All files are under RCS control, and for uniformity, all trailing

whitespace has been removed, so the changed recorded below are based on

"rcsdiff -b -w" listings to ignore spacing differences:

Here are brief descriptions of the changes from the mawk-1.3.9.1 test

release:

array.c:

Add typecasts on void*-assignments and/or function arguments.

Comment out two duplication function prototypes to remove

compiler warnings.

bi_funct.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

Add simple infty_() and nan_() functions, because infty() and

nan() are not universally available, or defined in C89.

Define THROW__ macro to attach to end of prototypes for

random() and srandom(), which are not reliably declared in

system header files on all systems, and to which C++

implementations may, or may not, attach a throw() attribute.

Make bi_log() test for negative and zero arguments before

calling log() to hide misbehavior of that function on Solaris.

bi_vars.c:

Add const modifier to declaration of bi_var_names[].

cast.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

code.c:

Convert K&R function definitions to c89 syntax.

config.h:

New file generated by configure script from config.hin, which

in turn is generated by autoheader from configure.in.

da.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

Change shadowed name variable to name_ in one code block to

eliminate compiler warnings.

error.c:

Convert K&R function definitions to c89 syntax.

execute.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

fcall.c:

Convert K&R function definitions to c89 syntax.

field.c:

Add typecasts on void*-assignments and/or function arguments.

files.c:

Convert K&R function definitions to c89 syntax.

fin.c:

Add prototype for isatty().

Convert K&R function definitions to c89 syntax.

fin.h:

Add preprocessor #define to change "setmode" to "setmode_" to

avoid conflict with declaration in <unistd.h> on BitRig BSD.

fpe_check.c:

Convert K&R function definitions to c89 syntax.

table.c:

hash.c renamed to table.c

Add preprocessor #define to rename C++ reserved word "delete"

to "delete_".

Convert K&R function definitions to c89 syntax.

init.c:

Convert K&R function definitions to c89 syntax.

Add preprocessor #define to rename optarg (declared in

<getopt.h> on some systems) to optarg_.

Add print_help() (output largely derived from "man

mawk"), and recognize --help and --version options, with

immediate exit 0, for compatibility with lots of other

free and open-source software.

Add support for --help and --version options.

table_kw.c:

Convert K&R function definitions to c89 syntax.

main.c:

Convert K&R function definitions to c89 syntax.

scancode.c:

makescan.c renamed to scancode.c

Convert K&R function definitions to c89 syntax.

Fix bug caught by C++ compilers: close(fp) should be

fclose(fp).

matherr.c:

Include config.h for HAVE_SIGINFO symbol.

Convert K&R function definitions to c89 syntax.

Define THROW__ appropriately for Solaris (__SunOS), C++, and

other.

mawk.h:

Include <stdint.h> for declarations of extended integer types.

parse.y:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

prtypes_int.c:

Convert K&R function definitions to c89 syntax.

printf.c:

Add typecasts on void*-assignments and/or function arguments.

Move one declaration before executable code to allow C89

compilation.

re_cmpl.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

scan.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

version.c:

Convert K&R function definitions to c89 syntax.

zmalloc.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

rexp/rexp.c:

Convert K&R function definitions to c89 syntax.

rexp/rexp.h:

Add const to RE_panic() prototype.

rexp/rexp0.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

Add definition of nonstandard (but often available) macro isblank().

Add preprocessor #define to rename C++ reserved word "try" to

"try_".

rexp/rexp1.c:

Add typecasts on void*-assignments and/or function arguments.

rexp/rexp2.c:

Add typecasts on void*-assignments and/or function arguments.

Convert K&R function definitions to c89 syntax.

rexp/rexp3.c:

Comment out duplication prototype for RE_new_run_stack().