/usr/include/features.h:323:26: fatal error: bits/predefs.h: No such file or directory


$ dpkg -L libc6-dev | grep features
/usr/include/features.h


$ dpkg -L libc6-dev | grep predef
/usr/include/i386-linux-gnu/bits/predefs.h


... After modifying the Makefile to include -I/usr/include/i386-linux-gnu, I then get this:

Linking bin/pbrt
/usr/bin/ld: cannot find crt1.o: No such file or directory
/usr/bin/ld: cannot find crti.o: No such file or directory
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libfl.a when searching for -lfl
/usr/bin/ld: skipping incompatible /usr/lib/libfl.a when searching for -lfl
/usr/bin/ld: cannot find -lfl
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIex.so when searching for -lIex
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIex.a when searching for -lIex
/usr/bin/ld: skipping incompatible /usr/lib/libIex.so when searching for -lIex
/usr/bin/ld: skipping incompatible /usr/lib/libIex.a when searching for -lIex
/usr/bin/ld: cannot find -lIex
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIlmImf.so when searching for -lIlmImf
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIlmImf.a when searching for -lIlmImf
/usr/bin/ld: skipping incompatible /usr/lib/libIlmImf.so when searching for -lIlmImf
/usr/bin/ld: skipping incompatible /usr/lib/libIlmImf.a when searching for -lIlmImf
/usr/bin/ld: cannot find -lIlmImf
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIlmThread.so when searching for -lIlmThread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIlmThread.a when searching for -lIlmThread
/usr/bin/ld: skipping incompatible /usr/lib/libIlmThread.so when searching for -lIlmThread
/usr/bin/ld: skipping incompatible /usr/lib/libIlmThread.a when searching for -lIlmThread
/usr/bin/ld: cannot find -lIlmThread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libImath.so when searching for -lImath
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libImath.a when searching for -lImath
/usr/bin/ld: skipping incompatible /usr/lib/libImath.so when searching for -lImath
/usr/bin/ld: skipping incompatible /usr/lib/libImath.a when searching for -lImath
/usr/bin/ld: cannot find -lImath
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIex.so when searching for -lIex
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libIex.a when searching for -lIex
/usr/bin/ld: skipping incompatible /usr/lib/libIex.so when searching for -lIex
/usr/bin/ld: skipping incompatible /usr/lib/libIex.a when searching for -lIex
/usr/bin/ld: cannot find -lIex
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libHalf.so when searching for -lHalf
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../libHalf.a when searching for -lHalf
/usr/bin/ld: skipping incompatible /usr/lib/libHalf.so when searching for -lHalf
/usr/bin/ld: skipping incompatible /usr/lib/libHalf.a when searching for -lHalf
/usr/bin/ld: cannot find -lHalf
/usr/bin/ld: cannot find -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/libstdc++.so when searching for -lstdc++
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/libstdc++.a when searching for -lstdc++
/usr/bin/ld: cannot find -lstdc++
/usr/bin/ld: cannot find -lm
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc.a when searching for -lgcc
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: cannot find -lc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
/usr/bin/ld: skipping incompatible /usr/lib/gcc/i686-linux-gnu/4.6.1/libgcc.a when searching for -lgcc
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: cannot find crtn.o: No such file or directory
collect2: ld returned 1 exit status
make: *** [bin/pbrt] Error 1