Added support for QNX system

[LuoZhongYao]

The current version is compiled on QNX, and QNX lacks some functions

[martanne]

Your bug report is lacking critical information, at the very least you have to provide version information and a compiler error message.

Also while from a technical standpoint QNX is an interesting system, the current license terms discourage me from spending any time on it.

[LuoZhongYao]

I'm sorroy. The version of the QNX system is 6.6, The compiler is qnx-sdp660. Compile the error message below

cleaning
dvtm build options:
CFLAGS   = -std=c99 -I. -DVERSION="0.15" -DNDEBUG -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -D_XOPEN_SOURCE_EXTENDED
LDFLAGS  = -lc -lutil -lncursesw
CC       = qcc
CC dvtm.c
In file included from /home/z/tools/qnx/target/qnx6/usr/include/stdlib.h:25:0,
                 from dvtm.c:13:
/home/z/tools/qnx/target/qnx6/usr/include/sys/platform.h:172:4: error: #error This version of XOPEN_SOURCE is not supported
dvtm.c: In function 'drawbar':
dvtm.c:358:2: warning: implicit declaration of function 'wcswidth' [-Wimplicit-function-declaration]
dvtm.c:364:4: warning: implicit declaration of function 'wcwidth' [-Wimplicit-function-declaration]
dvtm.c:367:4: warning: implicit declaration of function 'waddnwstr' [-Wimplicit-function-declaration]
dvtm.c: In function 'main':
dvtm.c:1772:3: warning: implicit declaration of function 'pselect' [-Wimplicit-function-declaration]
cc: /home/z/tools/qnx/host/linux/x86/usr/lib/gcc/arm-unknown-nto-qnx6.6.0eabi/4.7.3/cc1 error 1
Makefile:18: recipe for target 'dvtm.o' failed

If edit config.mk like this

# dvtm version
VERSION = 0.15

# Customize below to fit your system

PREFIX ?= /usr/local
MANPREFIX = ${PREFIX}/share/man
# specify your systems terminfo directory
# leave empty to install into your home folder
TERMINFO := ${DESTDIR}${PREFIX}/share/terminfo

INCS = -I.
LIBS = -lc -lutil -lncursesw
CPPFLAGS = -D_POSIX_C_SOURCE=200112L -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED
CFLAGS += -std=c99 ${INCS} -DVERSION=\"${VERSION}\" -DNDEBUG ${CPPFLAGS}
LDFLAGS += ${LIBS}

DEBUG_CFLAGS = ${CFLAGS} -UNDEBUG -O0 -g -ggdb -Wall -Wextra -Wno-unused-parameter

CC = qcc
STRIP = strip

This is compile the error message

cleaning
dvtm build options:
CFLAGS   = -std=c99 -I. -DVERSION="0.15" -DNDEBUG -D_POSIX_C_SOURCE=200112L -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED
LDFLAGS  = -lc -lutil -lncursesw
CC       = qcc
CC dvtm.c
dvtm.c: In function 'drawbar':
dvtm.c:358:2: warning: implicit declaration of function 'wcswidth' [-Wimplicit-function-declaration]
dvtm.c:364:4: warning: implicit declaration of function 'wcwidth' [-Wimplicit-function-declaration]
dvtm.c:367:4: warning: implicit declaration of function 'waddnwstr' [-Wimplicit-function-declaration]
dvtm.c: In function 'main':
dvtm.c:1772:3: warning: implicit declaration of function 'pselect' [-Wimplicit-function-declaration]
CC vt.c
vt.c:24:22: fatal error: langinfo.h: No such file or directory
compilation terminated.
cc: /home/z/tools/qnx/host/linux/x86/usr/lib/gcc/arm-unknown-nto-qnx6.6.0eabi/4.7.3/cc1 error 1
Makefile:18: recipe for target 'vt.o' failed
make: *** [vt.o] Error 1