Solaris' sed does not like this expression. Since -O0 is the default,

we can also omit it.

Zend/Zend.m4

@@ -170,7 +170,7 @@ fi
 
 changequote({,})
 if test -n "$GCC" && test "$ZEND_INLINE_OPTIMIZATION" != "yes"; then
-  INLINE_CFLAGS="`echo $ac_n "$CFLAGS $ac_c"|sed 's/-O[0-9]*//'` -O0"
+  INLINE_CFLAGS=`echo $ac_n "$CFLAGS $ac_c" | sed s/-O[0-9]*//`
 else
   INLINE_CFLAGS="$CFLAGS"
 fi