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Add new option `--disable-mmap' to configure script.

* builds/unix/configure.raw: New option `--disable-mmap'
is added.  It is for the developers to simulate the systems
without mmap() (like 4.3BSD, minix etc) on POSIX systems.

git/fs: mount .git/fs: mount/attach disallowed

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,11 @@

+2011-05-01  suzuki toshiya  <[email protected]>

+

+	Add new option `--disable-mmap' to configure script.

+

+	* builds/unix/configure.raw: New option `--disable-mmap' 

+	is added.  It is for the developers to simulate the systems

+	without mmap() (like 4.3BSD, minix etc) on POSIX systems.

+

 2011-04-30  suzuki toshiya  <[email protected]>

 	[truetype] Recalculate the sfnt table checksum always.

--- a/builds/unix/configure.raw

+++ b/builds/unix/configure.raw

@@ -189,8 +189,14 @@

 # Here we check whether we can use our mmap file component.

-AC_FUNC_MMAP

-if test "$ac_cv_func_mmap_fixed_mapped" != yes; then

+AC_ARG_ENABLE([mmap],

+  AS_HELP_STRING([--disable-mmap],

+                 [do not check mmap() and do not use]),

+  [enable_mmap="no"],[enable_mmap="yes"])

+if test "x${enable_mmap}" != "xno"; then

+  AC_FUNC_MMAP

+fi

+if test "x${enable_mmap}" = "xno" -o "$ac_cv_func_mmap_fixed_mapped" != "yes" ; then

   FTSYS_SRC='$(BASE_DIR)/ftsystem.c'

 else

   FTSYS_SRC='$(BUILD_DIR)/ftsystem.c'