diff --git a/packaging/build_darwin_64bit.sh b/packaging/build_darwin_64bit.sh
index 606dd51f8..c69c78417 100755
--- a/packaging/build_darwin_64bit.sh
+++ b/packaging/build_darwin_64bit.sh
@@ -29,9 +29,6 @@ if which ccache >/dev/null; then
     ccache -ps
 fi
 
-export CXXFLAGS="${CXXFLAGS:--O2 -frecord-gcc-switches}"
-echo "CXXFLAGS set to $CXXFLAGS"
-
 pushd depends
 make -j`getconf _NPROCESSORS_ONLN` HOST=x86_64-apple-darwin14 NO_QT=1 V=1
 popd
diff --git a/packaging/build_linux_64bit.sh b/packaging/build_linux_64bit.sh
index e3f58dac3..5aac6a2b5 100755
--- a/packaging/build_linux_64bit.sh
+++ b/packaging/build_linux_64bit.sh
@@ -16,7 +16,7 @@ if which ccache >/dev/null; then
     ccache -ps
 fi
 
-export CXXFLAGS="${CXXFLAGS:--O2 -frecord-gcc-switches}"
+export CXXFLAGS="${CXXFLAGS:--frecord-gcc-switches}"
 echo "CXXFLAGS set to $CXXFLAGS"
 
 cd depends
diff --git a/packaging/build_windows_32bit.sh b/packaging/build_windows_32bit.sh
index c87e66593..c9686f85d 100755
--- a/packaging/build_windows_32bit.sh
+++ b/packaging/build_windows_32bit.sh
@@ -20,7 +20,7 @@ if which ccache >/dev/null; then
     ccache -ps
 fi
 
-export CXXFLAGS="${CXXFLAGS:--O2 -frecord-gcc-switches}"
+export CXXFLAGS="${CXXFLAGS:--frecord-gcc-switches}"
 echo "CXXFLAGS set to $CXXFLAGS"
 
 pushd depends
diff --git a/packaging/build_windows_64bit.sh b/packaging/build_windows_64bit.sh
index 13386e016..bf4ad9d42 100755
--- a/packaging/build_windows_64bit.sh
+++ b/packaging/build_windows_64bit.sh
@@ -19,7 +19,7 @@ if which ccache >/dev/null; then
     ccache -ps
 fi
 
-export CXXFLAGS="${CXXFLAGS:--O2 -frecord-gcc-switches}"
+export CXXFLAGS="${CXXFLAGS:--frecord-gcc-switches}"
 echo "CXXFLAGS set to $CXXFLAGS"
 
 pushd depends