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[Xen-users] build error: symbols.c:83: warning: ignoring return value of 'fgets'


I'm trying to build xen-3.1.0-src and get this error:

make[5]: Entering directory `/home/admin/sources/xen-3.1.0-src/xen/tools'
gcc -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer -Wdeclaration-after-statement -o symbols symbols.c
cc1: warnings being treated as errors
symbols.c: In function 'read_symbol':
symbols.c:83: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result
make[5]: *** [symbols] Error 1
make[5]: Leaving directory `/home/admin/sources/xen-3.1.0-src/xen/tools'
make[4]: *** [default] Error 2
make[4]: Leaving directory `/home/admin/sources/xen-3.1.0-src/xen/tools'
make[3]: *** [/home/admin/sources/xen-3.1.0-src/xen/xen] Error 2
make[3]: Leaving directory `/home/admin/sources/xen-3.1.0-src/xen'
make[2]: *** [install] Error 2
make[2]: Leaving directory `/home/admin/sources/xen-3.1.0-src/xen'
make[1]: *** [install-xen] Error 2
make[1]: Leaving directory `/home/admin/sources/xen-3.1.0-src'
make: *** [world] Error 2

I'm running (LFS/ Linux on a dual opteron box.

What does this error mean?

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