diff --git a/configure.in b/configure.in
index 94e9d29..6999615 100644
--- a/configure.in
+++ b/configure.in
@@ -35,27 +35,18 @@ MYDOCUMENTFILES="COPYING FOSSEXCEPTION ChangeLog doc kyotocabinet.idl"
 MYPCFILES="kyotocabinet.pc"
 
 # Building flags
-MYCFLAGS="-Wall -ansi -pedantic -fPIC -fsigned-char -g0 -O2"
-MYCXXFLAGS="-Wall -fPIC -fsigned-char -g0 -O2"
-MYCPPFLAGS="-I. -I\$(INCLUDEDIR) -I/usr/local/include"
+MYCFLAGS="-Wall -ansi -pedantic -fPIC -fsigned-char"
+MYCXXFLAGS="-Wall -fPIC -fsigned-char"
+MYCPPFLAGS="-I. -I\$(INCLUDEDIR)"
 MYCPPFLAGS="$MYCPPFLAGS -DNDEBUG -D_GNU_SOURCE=1"
 MYCPPFLAGS="$MYCPPFLAGS -D_FILE_OFFSET_BITS=64 -D_REENTRANT -D__EXTENSIONS__"
-MYLDFLAGS="-L. -L\$(LIBDIR) -L/usr/local/lib"
+MYLDFLAGS="-L. -L\$(LIBDIR)"
 MYCMDLDFLAGS=""
 MYCMDLIBS=""
 MYLDLIBPATH=""
 MYLDLIBPATHENV="LD_LIBRARY_PATH"
 MYPOSTCMD="true"
 
-# Building paths
-PATH=".:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:$PATH"
-CPATH=".:/usr/local/include:$CPATH"
-LIBRARY_PATH=".:/usr/local/lib:$LIBRARY_PATH"
-LD_LIBRARY_PATH=".:/usr/local/lib:$LD_LIBRARY_PATH"
-PKG_CONFIG_PATH=".:/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH"
-export PATH CPATH LIBRARY_PATH LD_LIBRARY_PATH PKG_CONFIG_PATH
-
-
 
 #================================================================
 # Options
@@ -285,14 +276,6 @@ then
   MYCMDLIBS="$MYCMDLIBS $LIBS"
 fi
 
-# As-needed linking
-if uname | grep Linux >config.tmp
-then
-  MYLDFLAGS="$MYLDFLAGS -Wl,-rpath-link,.:/usr/local/lib:$MYLDLIBPATH"
-  MYLDFLAGS="$MYLDFLAGS -Wl,--as-needed"
-else
-  MYCMDLIBS="$MYCMDLIBS $LIBS"
-fi
 
 # Shared libraries
 if test "$enable_shared" != "no" && test "$enable_profile" != "yes"