[Xen-devel] linker error with xen-tools (tip)

[Dulloor <dulloor@xxxxxxxxx>]

With my modifications to libxc(adding/modifying a few files), I get
the following error, but only intermittently. There are no compilation
errors in my code. And, also interestingly when I add back the same
changes piece-meal and in a different order, this linker error
disappears. What could be the reason ?

gcc  -O2 -fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wno-unused-value
-Wdeclaration-after-statement  -D__XEN_TOOLS__ -MMD -MF
.loadpolicy.o.d  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE  -Wall -g
-Werror  -I../../../tools/libxc -I../../../tools/include
-I../../../tools/flask/libflask/include -I. -c -o loadpolicy.o
loadpolicy.c
gcc -O2 -fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wno-unused-value
-Wdeclaration-after-statement  -D__XEN_TOOLS__ -MMD -MF
.flask-loadpolicy.d  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE  -Wall
-g -Werror  -I../../../tools/libxc -I../../../tools/include
-I../../../tools/flask/libflask/include -I.     -L../../../tools/libxc
-L../../../tools/flask/libflask loadpolicy.o   -L. -lflask
-L../../../tools/libxc -lxenctrl -o flask-loadpolicy
../../../tools/libxc/libxenctrl.so: undefined reference to `xc_dom_printf'
collect2: ld returned 1 exit status
make[5]: *** [flask-loadpolicy] Error 1
make[5]: Leaving directory
`/data/devel/xen-devel/xen-unstable-numa-tip.hg/tools/flask/utils'
make[4]: *** [subdir-install-utils] Error 2
make[4]: Leaving directory
`/data/devel/xen-devel/xen-unstable-numa-tip.hg/tools/flask'
make[3]: *** [subdirs-install] Error 2
make[3]: Leaving directory
`/data/devel/xen-devel/xen-unstable-numa-tip.hg/tools/flask'
make[2]: *** [subdir-install-flask] Error 2
make[2]: Leaving directory
`/data/devel/xen-devel/xen-unstable-numa-tip.hg/tools'
make[1]: *** [subdirs-install] Error 2
make[1]: Leaving directory
`/data/devel/xen-devel/xen-unstable-numa-tip.hg/tools'
make: *** [install-tools] Error 2

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