.\" $OpenBSD: clang-local.1,v 1.2 2016/09/27 19:33:57 pascal Exp $
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.\" Copyright (c) 2016 Pascal Stumpf <pascal@stumpf.co>
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.Dd $Mdocdate: September 27 2016 $
.Dt CLANG-LOCAL 1
.Os
.Sh NAME
.Nm clang-local
.Nd OpenBSD-specific behavior of LLVM/clang
.Sh DESCRIPTION
On
.Ox ,
the LLVM/clang compiler exhibits the following characteristics:
.Bl -dash
.It
.Nm clang
comes with stack protection enabled by default, equivalent to the
.Fl fstack-protector-strong
option on other systems.
The system will report any violation of the stack protector cookie along
with the function name via
.Xr syslog 3
at
.Dv LOG_CRIT
priority.
.It
.Nm clang
will generate PIE code by default, allowing the system to load the resulting
binary at a random location.
This behavior can be turned off by passing
.Fl fno-pie
to the compiler and
.Fl nopie
to the linker.
.It
The
.Fl fstrict-aliasing
option is turned off by default unless
.Fl Ofast
has been selected.
.It
The
.Fl pg
flag is an alias of
.Fl p .
.El
.Sh SEE ALSO
.Xr clang 1