This introduces a new header that pulls in system includes for use only in the DMD front-end part of the compiler, fixing up uses of problematic functions that are prevalent throughout the code. Commits merged from dmd. Fix build of the D frontend on the Hurd and KFreeBSD. Initial patch from Matthias Klose. https://github.com/dlang/dmd/pull/8893 Don't care about D/C++ compatibility in C++ port. Fixes build error in https://gcc.gnu.org/PR87788 https://github.com/dlang/dmd/pull/8895 Allow compiling front-end headers with strict warnings. https://github.com/dlang/dmd/pull/8909 Add root/system.h header for wrapping system includes. Fixes https://gcc.gnu.org/PR87865 https://github.com/dlang/dmd/pull/8910 Move checkedint to dmd/root. https://github.com/dlang/dmd/pull/8912 Use rmem instead of libc for malloc() and strdup(). https://github.com/dlang/dmd/pull/8913 Use align(8) for alignment of UnionExp, fixing several BUS errors due to alignment issues on SPARC. https://github.com/dlang/dmd/pull/8914 Don't pass NULL pointer as format parameter to errorSupplemental. https://github.com/dlang/dmd/pull/8916 gcc/d/ChangeLog: 2018-11-05 Iain Buclaw <ibuclaw@gdcproject.org> PR d/87865 * d-system.h: New file. From-SVN: r265780
