--- configure	2023-04-14 02:15:33.000000000 +0800
+++ configure	2025-08-13 00:21:49.000000000 +0800
@@ -2141,26 +2141,16 @@
 # 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"
+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:$PKG_CONFIG_PATH"
-export PATH CPATH LIBRARY_PATH LD_LIBRARY_PATH PKG_CONFIG_PATH
-
-
-
 #================================================================
 # Options
 #================================================================
@@ -4004,29 +3994,6 @@
  presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
  esac
 
-
-# System-depending optimization
-printf 'checking for 64-bit availability... '
-if printf 'int main(void) {return 0;}' | $CC -xc -m64 -o config.tmp - >config.tmp 2>&1
-then
-  MYCFLAGS="-m64 $MYCFLAGS"
-  MYCXXFLAGS="-m64 $MYCXXFLAGS"
-  printf 'yes\n'
-else
-  printf 'no\n'
-fi
-if test "$enable_opt" != "no"
-then
-  printf 'checking for CPU optimization availability... '
-  if printf 'int main(void) {return 0;}' | $CC -xc -march=native -o config.tmp - >config.tmp 2>&1
-  then
-    MYCFLAGS="-march=native $MYCFLAGS"
-    MYCXXFLAGS="-march=native $MYCXXFLAGS"
-    printf 'yes\n'
-  else
-    printf 'no\n'
-  fi
-fi
 printf 'checking for useless warnings... '
 if printf 'int main(void) {return 0;}' | $CC -xc \
   -Wno-unused-but-set-variable -Wno-unused-but-set-parameter -o config.tmp - >config.tmp 2>&1
@@ -4045,10 +4012,10 @@
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
-int
+int64_t
 main ()
 {
-__sync_fetch_and_add
+__sync_fetch_and_add_8
   ;
   return 0;
 }