diff --git a/packages/toolchain/devel/m4/build b/packages/toolchain/devel/m4/build
index 7680eea3ea..352c6b4fc5 100755
--- a/packages/toolchain/devel/m4/build
+++ b/packages/toolchain/devel/m4/build
@@ -23,11 +23,6 @@
 # build for target
   setup_toolchain target
 
-# Fails to compile with GCC's link time optimization.
-  CFLAGS=`echo $CFLAGS | sed -e "s|-flto||" -e "s|-fuse-linker-plugin||"`
-  CXXFLAGS=`echo $CXXFLAGS | sed -e "s|-flto||" -e "s|-fuse-linker-plugin||"`
-  LDFLAGS=`echo $LDFLAGS | sed -e "s|-flto||" -e "s|-fuse-linker-plugin||" -e "s|-fwhole-program||"`
-
   cd $BUILD/$1*
   mkdir -p .objdir-target
   cd .objdir-target