paxtest compile fail

tim@black ~/paxtest-0.9.13 $ make linux
make -f Makefile.psm
make[1]: Entering directory '/home/tim/paxtest-0.9.13'
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -o chpax-0.7/aout.o -c chpax-0.7/aout.c
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -o chpax-0.7/chpax.o -c chpax-0.7/chpax.c
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -o chpax-0.7/elf32.o -c chpax-0.7/elf32.c
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -o chpax-0.7/elf64.o -c chpax-0.7/elf64.c
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -o chpax-0.7/flags.o -c chpax-0.7/flags.c
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -o chpax-0.7/io.o -c chpax-0.7/io.c
gcc  -o chpax chpax-0.7/aout.o chpax-0.7/chpax.o chpax-0.7/elf32.o chpax-0.7/elf64.o chpax-0.7/flags.o chpax-0.7/io.o
gcc -O2 -Wa,--noexecstack -D_FORTIFY_SOURCE=0 -DRUNDIR=\".\" -fno-stack-protector   -fPIC -o shlibtest.o -c shlibtest.c
shlibtest.c:10:1: error: stray ‘\’ in program
shlibtest.c:10:21: warning: multi-character character constant [-Wmultichar]
shlibtest.c:10:21: error: ‘x2f’ undeclared here (not in a function)
shlibtest.c:10:21: error: expected ‘}’ before '\x2c20e1'
Makefile.psm:235: recipe for target 'shlibtest.o' failed
make[1]: *** [shlibtest.o] Error 1
make[1]: Leaving directory '/home/tim/paxtest-0.9.13'
Makefile:11: recipe for target 'linux' failed
make: *** [linux] Error 2