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# PIE Support
#
# Produce a Position-Independent Executable (PIE) instead of a "normal"
# fixed-address ELF.
# A PIE is an executable whose code sections are compiled and linked so that,
# at runtime, they can be loaded at any base address in memory.
#
# Because it can be loaded at unpredictable addresses, PIE enables full Address
# Space Layout Randomization (ASLR) for your main executable-making certain
# classes of memory-corruption exploits much harder.
.if !defined(_PIE_MK_INCLUDED)
_PIE_MK_INCLUDED= yes
PIE_Include_MAINTAINER= portmgr@FreeBSD.org
. if !defined(PIE_UNSAFE)
. if defined(_INCLUDE_USES_CMAKE_MK)
CMAKE_ARGS+= -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=true
. else
PIE_CFLAGS?= -fPIE -fPIC
CFLAGS+= ${PIE_CFLAGS}
CXXFLAGS+= ${PIE_CFLAGS}
LDFLAGS+= -pie
STATIC_PIE_ARGS+= -static-pie
. endif
. endif
.endif
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