diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/dlfcn.h ./usr/include/dlfcn.h
--- /home/fornwall/lib/android-ndk/sysroot/usr/include/dlfcn.h	2017-06-07 01:07:52.000000000 +0200
+++ ./usr/include/dlfcn.h	2017-06-18 01:32:23.881672767 +0200
@@ -61,23 +61,23 @@
 
 int dladdr(const void* addr, Dl_info* _Nonnull info);
 
-enum {
+/* Termux modification: Use #define for these instead of an enum
+   to improve compatibility with ifdef checks. */
 #if defined(__LP64__)
-  RTLD_NOW  = 2,
+# define RTLD_NOW 2
 #else
-  RTLD_NOW  = 0,
+# define RTLD_NOW 0
 #endif
-  RTLD_LAZY = 1,
+# define RTLD_LAZY 1
 
-  RTLD_LOCAL  = 0,
+# define RTLD_LOCAL 0
 #if defined(__LP64__)
-  RTLD_GLOBAL = 0x00100,
+# define RTLD_GLOBAL 0x00100
 #else
-  RTLD_GLOBAL = 2,
+# define RTLD_GLOBAL 2
 #endif
-  RTLD_NOLOAD = 4,
-  RTLD_NODELETE = 0x01000,
-};
+# define RTLD_NOLOAD 4
+# define RTLD_NODELETE 0x01000
 
 #if defined (__LP64__)
 #define RTLD_DEFAULT  __BIONIC_CAST(reinterpret_cast, void*, 0)