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-rw-r--r--configure.ac22
1 files changed, 19 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac
index 57cf46f..269c41e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2737,9 +2737,25 @@ AC_MSG_RESULT($with_system_expat)
# Check for use of the system libffi library
AC_MSG_CHECKING(for --with-system-ffi)
AC_ARG_WITH(system_ffi,
- AS_HELP_STRING([--with-system-ffi], [build _ctypes module using an installed ffi library]),
- [],
- [with_system_ffi="no"])
+ AS_HELP_STRING([--with-system-ffi], [build _ctypes module using an installed ffi library]),,,)
+
+case "$with_system_ffi" in
+ "")
+ case $ac_sys_system in
+ Darwin)
+ with_system_ffi="no"
+ ;;
+ *)
+ with_system_ffi="yes"
+ ;;
+ esac
+ ;;
+ yes|no)
+ ;;
+ *)
+ AC_MSG_ERROR([--with-system-ffi accepts no arguments])
+ ;;
+esac
if test "$with_system_ffi" = "yes" && test -n "$PKG_CONFIG"; then
LIBFFI_INCLUDEDIR="`"$PKG_CONFIG" libffi --cflags-only-I 2>/dev/null | sed -e 's/^-I//;s/ *$//'`"