src/usr.bin/bc, branch release/10.3.0

MFC r291155:

2015-12-26T18:26:44Z

bc: sync with OpenBSD tty.c Rev. 1.3 Avoid unintended problems with operator precedence when doing an assignment and comparison. bc.1, Rev. 1.31, 1.32 '.Ql Quit' -> '.Ql quit' because only the lowercase command is valid. Clarify sentence about `quit` in BUGS section. extern.h, Rev. 1.12 whitespace bc.y, Rev. 1.47 Prefer setvbuf() to setlinebuf() for portability Obtained from: OpenBSD

MFC r270650 (this is what should have been committed in r273497):

2014-10-23T00:43:08Z

Convert LIBCURSES to LIBNCURSES to fix "make checkdpadd" Also, add a missing LIBPANEL dependency for lldb Approved by: rpaulo (mentor) Suggested by: brooks Phabric: D675 (as part of a larger diff) PR: 192762

MFC r264573+264608+264609:

2014-05-07T08:06:54Z

Sync with OpenBSD.

MFC r259058,r259060:

2013-12-23T20:20:46Z

Remove -q from usage. Document -q and --quiet as discouraged compatibility option.

Work around build breakages with GCC 4.2.

2013-05-23T05:42:35Z

Reported by: tinderbox

Add the Clang specific -Wmissing-variable-declarations to WARNS=6.

2013-04-19T19:45:00Z

This compiler flag enforces that that people either mark variables static or use an external declarations for the variable, similar to how -Wmissing-prototypes works for functions. Due to the fact that Yacc/Lex generate code that cannot trivially be changed to not warn because of this (lots of yy* variables), add a NO_WMISSING_VARIABLE_DECLARATIONS that can be used to turn off this specific compiler warning. Announced on: toolchain@

Make definition match declaration

2012-11-15T15:06:00Z

Approved by: cperciva MFC after: 3 days

Fix world after byacc import:

2012-05-22T16:33:10Z

- old yacc(1) use to magicially append stdlib.h, while new one don't - new yacc(1) do declare yyparse by itself, fix redundant declaration of 'yyparse' Approved by: des (mentor)

Repair function when used with large scales

2012-03-18T15:34:39Z

Submitted by: AIDA Shinra

- Fix an erroneous invocation of the editline.

2012-03-15T01:43:44Z

- Fix wrong scaling in the bc.library. - Let length(0.000) conform to what gnu bc does. PR: bin/159227 Submitted by: AIDA Shinra