$ gcc -v
Using built-in specs.
Target: i586-suse-linux
Configured with: ../configure --enable-threads=posix --prefix=/usr --w
+ith-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/s
+hare/man --libdir=/usr/lib --libexecdir=/usr/lib --enable-languages=c
+,c++,objc,fortran,java,ada --enable-checking=release --with-gxx-inclu
+de-dir=/usr/include/c++/4.1.0 --enable-ssp --disable-libssp --enable-
+java-awt=gtk --enable-gtk-cairo --disable-libjava-multilib --with-sli
+bdir=/lib --with-system-zlib --enable-shared --enable-__cxa_atexit --
+enable-libstdcxx-allocator=new --without-system-libunwind --with-cpu=
+generic --host=i586-suse-linux
Thread model: posix
gcc version 4.1.0 (SUSE Linux)
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Not modern enough? ;-)

But yes, gcc is a cranky beast. On some releases things appear to be broken which aren't. And, 5.6.1 didn't build "out of the box", I had to patch DB_File.xs due to a modern Berkeley DB version.

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}