maybe im doing something wrong..

[knope]

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3.12.0-7-generic #15-Ubuntu SMP Sun Dec 8 23:39:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
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xosd-config --version
2.2.14
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$ acpi --version
acpi 1.7
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awesome --version
awesome v3.4.15 (Never Gonna Give You Up)
• Build: Apr 28 2013 18:48:19 for x86_64 by gcc version 4.8.0 (buildd@batsu)
• D-Bus support: ✔
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~/xbattbar/xbattbar-acpi-master$ make
gcc -O2 -D_BSD_SOURCE -D_XOPEN_SOURCE -D_SVID_SOURCE -c xosd-config --cflags -o xbattbar-acpi.o xbattbar-acpi.c
gcc -lXext -lacpi xosd-config --libs -o xbattbar-acpi xbattbar-acpi.o
xbattbar-acpi.o: In function draw': /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:131: undefined reference toXSetForeground'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:132: undefined reference to XFillRectangle' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:133: undefined reference toXSetForeground'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:134: undefined reference to XFillRectangle' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:125: undefined reference toXSetForeground'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:126: undefined reference to XFillRectangle' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:127: undefined reference toXSetForeground'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:128: undefined reference to XFillRectangle' xbattbar-acpi.o: In functionbattery_check':
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:152: undefined reference to init_acpi_batt' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:163: undefined reference toread_acpi_batt'
xbattbar-acpi.o: In function alloc_color': /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:205: undefined reference toXAllocNamedColor'
xbattbar-acpi.o: In function init_display': /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:227: undefined reference toXOpenDisplay'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:232: undefined reference to XGetGeometry' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:272: undefined reference toXCreateSimpleWindow'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:278: undefined reference to XChangeWindowAttributes' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:280: undefined reference toXMapWindow'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:282: undefined reference to XCreateGC' xbattbar-acpi.o: In functionshowdiagbox':
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:413: undefined reference to xosd_create' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:419: undefined reference toxosd_set_font'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:420: undefined reference to xosd_set_colour' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:421: undefined reference toxosd_set_shadow_offset'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:428: undefined reference to xosd_set_pos' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:434: undefined reference toxosd_set_align'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:438: undefined reference to xosd_display' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:426: undefined reference toxosd_set_pos'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:436: undefined reference to xosd_set_align' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:432: undefined reference toxosd_set_align'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:424: undefined reference to xosd_set_pos' xbattbar-acpi.o: In functiondraw':
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:136: undefined reference to XFlush' xbattbar-acpi.o: In functiondisposediagbox':
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:293: undefined reference to xosd_destroy' xbattbar-acpi.o: In functionmain':
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:588: undefined reference to check_acpi_support' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:597: undefined reference toXSelectInput'
/home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:620: undefined reference to XWindowEvent' /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:648: undefined reference toXRaiseWindow'
xbattbar-acpi.o: In function disposediagbox': /home/no/xbattbar/xbattbar-acpi-master/xbattbar-acpi.c:293: undefined reference toxosd_destroy'
collect2: error: ld returned 1 exit status
make: ** [all] Error 1

[aravind]

you are missing linker flags for X libraries. I use this.

gcc -lXext -lacpi xosd-config --libs -o xbattbar-acpi xbattbar-acpi.o