Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving to -O2
to remove warnings.

Signed-off-by: Dave Jiang <[email protected]>
---

-v2: Add -O2 option to configure.ac as well. (Vishal)

 README.md    |    2 +-
 autogen.sh   |    2 +-
 configure.ac |    3 ++-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 899dcbb8..e0bc5b7b 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ sub-system in the Linux kernel
 Build
 =====
 `./autogen.sh`  
-`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc 
--libdir=/usr/lib64`  
+`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc 
--libdir=/usr/lib64`  
 `make`  
 `make check`  
 `sudo make install`  
diff --git a/autogen.sh b/autogen.sh
index a23cf53c..2a52688b 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -24,5 +24,5 @@ echo 
"----------------------------------------------------------------"
 echo "Initialized build system. For a common configuration please run:"
 echo "----------------------------------------------------------------"
 echo
-echo "./configure CFLAGS='-g -O0' $args"
+echo "./configure CFLAGS='-g -O2' $args"
 echo
diff --git a/configure.ac b/configure.ac
index 6dbfcee8..a1e4e837 100644
--- a/configure.ac
+++ b/configure.ac
@@ -149,7 +149,8 @@ my_CFLAGS="\
 -Wtype-limits \
 -Wmaybe-uninitialized \
 -Wunused-result \
--D_FORTIFY_SOURCE=2
+-D_FORTIFY_SOURCE=2 \
+-O2
 "
 AC_SUBST([my_CFLAGS])
 

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