Are C++ bindings activated in the Archlinux NCurses library ?

Question

Hello,
I want to write an application using the c++ bindings of the ncurses library.
I managed to compile something like :
#include <curses.h>
#include <cursesw.h>
int main()
NCursesWindow *test;
return (0);
But when I start to use C++ symbols such as a NCursesWindow constructor (which is present and public in the cursesw.h header file) :
#include <curses.h>
#include <cursesw.h>
int main()
NCursesWindow *test = new NCursesWindow(10, 10, 0, 0);
(void)test;
return (0);
I get the error :
$ make
g++ -W -Wall -Wextra -I Includes/ -std=c++11 -c -o Sources/main.o Sources/main.cpp
g++ -o cppcurses Sources/main.o -lncurses
Sources/main.o: In function `main':
main.cpp:(.text+0x31): undefined reference to `NCursesWindow::NCursesWindow(int, int, int, int)'
collect2: error: ld returned 1 exit status
Makefile:25: recipe for target 'cppcurses' failed
make: *** [cppcurses] Error 1
So I was wondering : are the c++ bindings activated in the ncurses library provided by the core repository ? And if not, shouldn't they be ?
(It works fine if I link the libncurses++.a created by downloading and building the library from the sources, but I find it quite inconvenient)
Thanks !
Last edited by Unda (2014-10-12 01:08:08)

Answer 1

Well, it seems that the configuration script provided by the ncurses source code is really messed up, the only way I was able to build a ncurses++.so is by passing the option --with-libtool and modifying the package function too...
Since it is not too big, I post the entire PKGBUILD here, it works for me and if someone else can confirm that it works, I'll file a bug report
# $Id: PKGBUILD 197156 2013-10-23 13:04:21Z allan $
# Maintainer: Allan McRae <[email protected]>
# Contributor: judd <[email protected]>
pkgname=ncurses
pkgver=5.9
pkgrel=7
pkgdesc="System V Release 4.0 curses emulation library"
arch=('i686' 'x86_64')
url="http://www.gnu.org/software/ncurses/"
license=('MIT')
depends=('glibc')
source=(ftp://ftp.gnu.org/pub/gnu/${pkgname}/${pkgname}-${pkgver}.tar.gz{,.sig})
md5sums=('8cb9c412e5f2d96bc6f459aa8c6282a1'
'014ffdbbfec6d41a9a89d6cbe6434638')
prepare() {
#cleaning the old building directories
cd ${srcdir}/
rm -Rf ./ncurses{,w}-build
build() {
cd ${srcdir}/
mkdir ncurses{,w}-build
cd ${srcdir}/ncursesw-build
../${pkgname}-${pkgver}/configure --prefix=/usr --mandir=/usr/share/man \
--with-shared --with-normal --without-debug --without-ada \
--enable-widec --enable-pc-files --with-cxx-binding --with-cxx-shared \
--with-libtool \
# add --enable-ext-colors and --enable-ext-mouse with next soname bump
make
# libraries for external binary support
cd ${srcdir}/ncurses-build
[ $CARCH = "x86_64" ] && CONFIGFLAG="--with-chtype=long"
../${pkgname}-${pkgver}/configure --prefix=/usr \
--with-shared --with-normal --without-debug --without-ada --with-cxx-binding \
--with-cxx-shared --with-libtool $CONFIGFLAG
make
package() {
cp -n ${srcdir}/ncurses-build/lib/.libs/*.so* ${srcdir}/ncurses-build/lib/
cp -n ${srcdir}/ncursesw-build/lib/.libs/*.so* ${srcdir}/ncursesw-build/lib/
for lib in ncurses form panel menu; do
cp -n ${srcdir}/ncurses-build/lib/lib${lib}.so ${srcdir}/ncurses-build/lib/lib${lib}.so.${pkgver}
cp -n ${srcdir}/ncursesw-build/lib/lib${lib}w.so ${srcdir}/ncursesw-build/lib/lib${lib}w.so.${pkgver}
done
cd ${srcdir}/ncursesw-build
../${pkgname}-${pkgver}/misc/shlib make DESTDIR=${pkgdir} install
# fool packages looking to link to non-wide-character ncurses libraries
for lib in ncurses form panel menu; do
echo "INPUT(-l${lib}w)" >${pkgdir}/usr/lib/lib${lib}.so
done
for lib in ncurses ncurses++ form panel menu; do
ln -s ${lib}w.pc ${pkgdir}/usr/lib/pkgconfig/${lib}.pc
done
# some packages look for -lcurses during build
echo "INPUT(-lncursesw)" >${pkgdir}/usr/lib/libcursesw.so
ln -s libncurses.so ${pkgdir}/usr/lib/libcurses.so
# non-widec compatibility libraries
cd ${srcdir}/ncurses-build
for lib in ncurses form panel menu; do
install -Dm755 lib/lib${lib}.so.${pkgver} ${pkgdir}/usr/lib/lib${lib}.so.${pkgver}
ln -s lib${lib}.so.${pkgver} ${pkgdir}/usr/lib/lib${lib}.so.5
done
# install license, rip it from the readme
cd ${srcdir}/${pkgname}-${pkgver}
install -dm755 ${pkgdir}/usr/share/licenses/$pkgname
grep -B 100 '$Id' README > ${pkgdir}/usr/share/licenses/${pkgname}/license.txt
Last edited by mauritiusdadd (2014-10-13 12:05:41)