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Message-ID: <51617A39.9000901@schueler.homeip.net>
Date: Sun, 07 Apr 2013 15:52:57 +0200
From: =?ISO-8859-15?Q?=22D=2E_Sch=FCler=22?= <admin AT schueler DOT homeip DOT net>
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To: cygwin AT cygwin DOT com
Subject: perl 5.14 ncursesw: calling getbegyx() crashes
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Hello Mailinglist!

i'm using cygwin together with perl 5.14 and the Curses::UI perl module.
It uses the ncursesw library bundled with cygwin.

Installing the Curses::UI worked well using cpan, but using the ncurses
functions like getyx() from the demo-script bundled with the curses
module crahes perl with the error-message:
Curses function 'getyx' is not defined in your Curses library at demo
line 59.

Looking into /usr/include/ncursesw/cursesw.h shows that this macro is
defined.

Even building the Curses module for perl by hand, reveals that there is
something wrong with the ncurses library:

~/Curses-1.28 $  export CURSES_LDFLAGS="-L/usr/lib/ncurses -lncurses"
~/Curses-1.28 $  export CURSES_CFLAGS="-I/usr/include/ncurses"
~/Curses-1.28 $ perl Makefile.PL
GEN    function:  not applicable
PANELS functions: not enabled
MENUS  functions: not enabled
FORMS  functions: not enabled

Writing Makefile for Curses
Writing MYMETA.yml

~/Curses-1.28 $ perl test.syms -v PANELS MENUS FORMS
Checking capabilities of the Ncurses libraries.
Set CURSES_VERBOSE environment variable to see the details of the tests.

Doing test compiles with the compile command 'gcc-4 -DSYM="_C_SYM_"
-I/usr/include/ncurses -DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g
-fno-strict-aliasing -pipe -fstack-protector -DUSEIMPORTLIB -o _C_FILE_
_C_FILE_.c  -L/usr/local/lib -L/usr/lib/ncurses -lncurses'
gcc-4 -DSYM="waddch(stdscr,0)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
(rc = 0)
function 'waddch' found
gcc-4 -DSYM="wechochar(stdscr,0)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
(rc = 0)
function 'wechochar' found

...

gcc-4 -DSYM="getyx(stdscr,LINES,LINES)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
testsym.c: In function <91>main<92>:
testsym.c:4:3: error: lvalue required as left operand of assignment
testsym.c:4:3: error: lvalue required as left operand of assignment
(rc = 256)
function 'getyx' NOT found
gcc-4 -DSYM="getparyx(stdscr,LINES,LINES)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
testsym.c: In function <91>main<92>:
testsym.c:4:3: error: lvalue required as left operand of assignment
testsym.c:4:3: error: lvalue required as left operand of assignment
(rc = 256)
function 'getparyx' NOT found
gcc-4 -DSYM="getbegyx(stdscr,LINES,LINES)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
testsym.c: In function <91>main<92>:
testsym.c:4:3: error: lvalue required as left operand of assignment
testsym.c:4:3: error: lvalue required as left operand of assignment
(rc = 256)
function 'getbegyx' NOT found
gcc-4 -DSYM="getmaxyx(stdscr,LINES,LINES)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
testsym.c: In function <91>main<92>:
testsym.c:4:3: error: lvalue required as left operand of assignment
testsym.c:4:3: error: lvalue required as left operand of assignment
(rc = 256)
function 'getmaxyx' NOT found

...

gcc-4 -DSYM="getsyx(LINES,LINES)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testsym testsym.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
testsym.c: In function <91>main<92>:
testsym.c:4:3: error: lvalue required as left operand of assignment
testsym.c:4:3: error: lvalue required as left operand of assignment
testsym.c:4:3: error: lvalue required as left operand of assignment
(rc = 256)
function 'getsyx' NOT found
gcc-4 -DSYM="getsyx(LINES,LINES)" -I/usr/include/ncurses
-DPERL_USE_SAFE_PUTENV -U__STRICT_ANSI__ -g -fno-strict-aliasing -pipe
-fstack-protector -DUSEIMPORTLIB -o testint testint.c  -L/usr/local/lib
-L/usr/lib/ncurses -lncurses
testint.c: In function <91>main<92>:
testint.c:6:9: error: expected expression before <91>do<92>
(rc = 256)

...


I tested this on two different OS (Win7 and XP) with the latest version
of cygwins libncursesw.

Is the macro missing in the library itself? What could i do to make it
working?

Kind regards,

David Schueler

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