User:Ssvb

GDC tips and tricks

GDC 11+ requires "-flto" or "-fno-weak-templates" option to avoid a major performance regression: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102765

Shared library linking workaround to run phobos unit tests: https://bugzilla.gdcproject.org/show_bug.cgi?id=199

Demangle symbols: https://dlang.org/phobos/std_demangle.html

Mingw build and test instructions: TODO

Arithmetic overflows

TODO: create a new DIP? https://forum.dlang.org/post/rclilxjpnjvexggncfhd@forum.dlang.org

TODO: Atomic operations and arithmetic overflows?

TODO: Unsigned overflows?

GDC supports "-ftrapv" easter egg option for trapping signed overflows.

Relevant links:

• https://dlang.org/phobos/core_checkedint.html
• https://forum.dlang.org/post/s3dm64$2f2i$1@digitalmars.com
• https://news.ycombinator.com/item?id=24575780
• https://gcc.gnu.org/legacy-ml/gcc/2014-07/msg00251.html
• https://gcc.gnu.org/onlinedocs/gccint/Integer-library-routines.html

GCC history of -fno-strict-aliasing and -fwrapv:

• https://www.mail-archive.com/redhat-list@redhat.com/msg18009.html
• https://lists.gnu.org/archive/html/autoconf-patches/2006-12/msg00091.html
• https://lists.gnu.org/archive/html/bug-gnulib/2006-12/msg00094.html
• https://gcc.gnu.org/legacy-ml/gcc/2008-02/msg00732.html

Associative arrays and hash collisions

https://forum.dlang.org/post/navsnrjweslsqeaawsev@forum.dlang.org

Relevant links:

• https://en.wikipedia.org/wiki/Collision_attack#Hash_flooding
• https://en.wikipedia.org/wiki/SipHash
• https://github.com/google/highwayhash ("Defending against hash flooding" section)
• https://github.com/google/highwayhash/issues/28