I am trying to compile a library I have successfully compiled in the past using gcc-4.8.2. The library (graphviz) is no longer compiling under gcc-7.3.0. I have contacted the library mailing list as well, but I'm not sure which side the error originates from. One example error message looks like this: ../../lib/expr/.libs/libexpr_C.a(sfclose.o): In function `fstat': /mygcc/gcc-7.3.0/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include-fixed/sys/stat.h:509: multiple definition of `fstat' ../../lib/expr/.libs/libexpr_C.a(strton.o):/mygcc/gcc-7.3.0/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include-fixed/sys/stat.h:509: first defined here There are many of these for other object files, but all say that fstat is multiply defined. Does this look familiar to anyone? Is there a workaround or something like that?