Revert adding hardening options to compile.

This appears to have caused performance regressions, which will need to be investigated.

This reverts commit 0b0284ba21989a0b8377f0a4d1057e3e7cd5fae1.
This reverts commit 4bde728b0eb8d277c8f59bfaf24869da67c68c47.

Makefile

@@ -35,13 +35,6 @@ ifeq ($(PLATFORM),Linux)
   CXX ?= g++
 
   CXXFLAGS += -std=c++0x
-  HARDENING_CFLAGS := -fstack-protector-all -Wstack-protector --param ssp-buffer-size=4 -fPIC
-  CFLAGS += ${HARDENING_CFLAGS}
-# TODO(alexmiller): boost 1.52.0 prevents us from using most of these with -Werror.
-# Reassess after boost has been upgraded to >1.52.0.
-# CFLAGS += -Wall -Wextra -Wformat-security -Wconversion -Wsign-conversion -Werror
-  HARDENING_LDFLAGS := -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now
-  LDFLAGS := ${HARDENING_CFLAGS} ${HARDENING_LDFLAGS}
 
   BOOSTDIR ?= /opt/boost_1_52_0
   DLEXT := so
@@ -91,6 +84,7 @@ CFLAGS += -g
 # valgrind-compatibile builds are enabled by uncommenting lines in valgind.mk
 
 CXXFLAGS += -Wno-deprecated
+LDFLAGS :=
 LIBS :=
 STATIC_LIBS :=
 

build/link-wrapper.sh

@@ -15,9 +15,7 @@ case $1 in
 		OPTIONS="$OPTIONS -Wl,-dylib_install_name -Wl,$( basename $3 )"
 	    fi
 	else
-	    if [ "$PLATFORM" = "linux" ]; then
-	        OPTIONS="$OPTIONS -pie -fPIE"
-	    fi
+	    OPTIONS=
 	fi
 
 	OPTIONS=$( eval echo "$OPTIONS $LDFLAGS \$$2_LDFLAGS \$$2_OBJECTS \$$2_LIBS \$$2_STATIC_LIBS_REAL -o $3" )