--- makepkg-optimize
+++ makepkg-optimize
@@ -877,6 +877,21 @@ run_build() {
 		NMFLAGS+=" --plugin $LTOPLUGIN"
 	fi
 
+	# Generate or utilize pgo if it is requested (check buildenv and PKGBUILD opts)
+	if check_buildoption "pgo" "y"; then
+		if [ ! -d "$PROFDEST/$pkgbase.gen" ]; then
+			mkdir "$PROFDEST/$pkgbase.gen"
+			CFLAGS+="-fprofile-generate -fprofile-dir=$PROFDEST/$pkgbase.gen"
+			CXXFLAGS+="-fprofile-generate -fprofile-dir=$PROFDEST/$pkgbase.gen"
+			LDFLAGS+="-lgcov"
+		else
+			[[ ! -d "$PROFDEST/$pkgbase.used" ]] && mv "$PROFDEST/$pkgbase.gen" "$PROFDEST/$pkgbase.used"
+			CFLAGS+="-fprofile-correction -fprofile-use -fprofile-dir=$PROFDEST/$pkgbase.used"
+			CXXFLAGS+="-fprofile-correction -fprofile-use -fprofile-dir=$PROFDEST/$pkgbase.used"
+		fi
+	fi
+
+
 	run_function_safe "build"
 }
 
@@ -2012,6 +2027,7 @@ trap 'trap_exit USR1 "$(gettext "An unknown error has occurred. Exiting...")"' E
 # preserve environment variables and canonicalize path
 [[ -n ${PKGDEST} ]] && _PKGDEST=$(canonicalize_path ${PKGDEST})
 [[ -n ${SRCDEST} ]] && _SRCDEST=$(canonicalize_path ${SRCDEST})
+[[ -n ${PROFDEST} ]] && _PROFDEST=$(canonicalize_path ${PROFDEST})
 [[ -n ${SRCPKGDEST} ]] && _SRCPKGDEST=$(canonicalize_path ${SRCPKGDEST})
 [[ -n ${LOGDEST} ]] && _LOGDEST=$(canonicalize_path ${LOGDEST})
 [[ -n ${BUILDDIR} ]] && _BUILDDIR=$(canonicalize_path ${BUILDDIR})
@@ -2109,6 +2125,14 @@ if (( SOURCEONLY )); then
 	IGNOREARCH=1
 fi
 
+PROFDEST=${_PROFDEST:-$PROFDEST}
+PROFDEST=${PROFDEST:-$startdir} #default to $startdir if undefined
+if [[ ! -w $PROFDEST ]] ; then
+	error "$(gettext "You do not have write permission to store profiles in %s.")" "$PROFDEST"
+	plain "$(gettext "Aborting...")"
+	exit 1
+fi
+
 LOGDEST=${_LOGDEST:-$LOGDEST}
 LOGDEST=${LOGDEST:-$startdir} #default to $startdir if undefined
 if (( LOGGING )) && [[ ! -w $LOGDEST ]]; then