rely on GNU make for building

libmcrypt/libmcrypt.spec

@@ -42,7 +42,7 @@ Patch0:       libmcrypt.patch
 #   build information
 Prefix:       %{l_prefix}
 BuildRoot:    %{l_buildroot}
-BuildPreReq:  OpenPKG, openpkg >= 20030103
+BuildPreReq:  OpenPKG, openpkg >= 20030103, make
 PreReq:       OpenPKG, openpkg >= 20030103
 AutoReq:      no
 AutoReqProv:  no
@@ -59,8 +59,6 @@ AutoReqProv:  no
 %prep
     %setup -q
     %patch -p0
-    #   avoid rebuilding
-    touch lib/mcrypt_symb.c
 
 %build
     ACLOCAL=true \
@@ -74,7 +72,7 @@ AutoReqProv:  no
         --prefix=%{l_prefix} \
         --disable-shared \
         --enable-static
-    %{l_make} %{l_mflags}
+    %{l_make} %{l_mflags -O}
 
 %install
     rm -rf $RPM_BUILD_ROOT