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-rw-r--r--macros/neon.m44
1 files changed, 3 insertions, 1 deletions
diff --git a/macros/neon.m4 b/macros/neon.m4
index 41a8fe0..5ebc142 100644
--- a/macros/neon.m4
+++ b/macros/neon.m4
@@ -439,8 +439,10 @@ AC_DEFUN([NEON_COMMON_CHECKS], [
# These checks are done whether or not the bundled neon build
# is used.
+ifdef([AC_USE_SYSTEM_EXTENSIONS],
+[AC_USE_SYSTEM_EXTENSIONS],
+[AC_ISC_POSIX])
AC_REQUIRE([AC_PROG_CC])
-AC_REQUIRE([AC_ISC_POSIX])
AC_REQUIRE([AC_C_INLINE])
AC_REQUIRE([AC_C_CONST])
AC_REQUIRE([AC_TYPE_SIZE_T])