configure: Add --with-optimize-option, for setting the default value of
OPTIMIZE_OPTION.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86005 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 794326d..7d0a9bb 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -607,6 +607,23 @@
AC_MSG_ERROR([Invalid llvm-gcc. Use --with-llvmgcc when --with-llvmgxx is used]);
fi
+dnl Override the option to use for optimized builds.
+AC_ARG_WITH(optimize-option,
+ AS_HELP_STRING([--with-optimize-option],
+ [Select the compiler options to use for optimized builds]),,
+ withval=default)
+AC_MSG_CHECKING([optimization flags])
+case "$withval" in
+ default)
+ case "$llvm_cv_os_type" in
+ MingW) optimize_option=-O3 ;;
+ *) optimize_option=-O2 ;;
+ esac ;;
+ *) optimize_option="$withval" ;;
+esac
+AC_SUBST(OPTIMIZE_OPTION,$optimize_option)
+AC_MSG_RESULT([$optimize_option])
+
dnl Specify extra build options
AC_ARG_WITH(extra-options,
AS_HELP_STRING([--with-extra-options],