- AC_CACHE_CHECK([if \$CC accepts -O],
- [ac_cv_c_o],
- [CFLAGS="${CFLAGS_save} -O"
- AC_TRY_COMPILE([],,ac_cv_c_o=yes, ac_cv_c_o=no)])
- if test "${ac_cv_c_o}" != "no"; then
- CFLAGS_OPTIM_SPEED="${CFLAGS_OPTIM_SPEED} -O"
+ AC_CACHE_CHECK([if \$CC accepts -O2],
+ [ac_cv_c_o2],
+ [CFLAGS="${CFLAGS_save} -O2"
+ AC_TRY_COMPILE([],,ac_cv_c_o2=yes, ac_cv_c_o2=no)])
+ if test "${ac_cv_c_o2}" != "no"; then
+ CFLAGS_OPTIM_SPEED="${CFLAGS_OPTIM_SPEED} -O2"
+ else
+ AC_CACHE_CHECK([if \$CC accepts -O],
+ [ac_cv_c_o],
+ [CFLAGS="${CFLAGS_save} -O"
+ AC_TRY_COMPILE([],,ac_cv_c_o=yes, ac_cv_c_o=no)])
+ if test "${ac_cv_c_o}" != "no"; then
+ CFLAGS_OPTIM_SPEED="${CFLAGS_OPTIM_SPEED} -O"
+ fi