1 files changed, 60 insertions, 0 deletions
diff --git a/cmake/glibc-compat-symbols.h b/cmake/glibc-compat-symbols.h
new file mode 100644
index 00000000..d8d0d172
--- /dev/null
+++ b/cmake/glibc-compat-symbols.h
@@ -0,0 +1,60 @@
+#ifndef __GLIBC_COMPAT_SYMBOLS_H__
+#define __GLIBC_COMPAT_SYMBOLS_H__ 1
+ 
+/**
+ *
+ * Note: Patching a specific glibc symbol version is only required if *not* statically linking glibc,
+ *       which should be preferred.
+ *
+ * Note: JogAmp's minimum GLIBC is 2.4 due to '__stack_chk_fail' (stack overflow checking)
+ *   
+ *   GLIBC 2.4 - March 2006  - Standard for LSB 4.0, Used in SLES 10
+ *   
+ * We could add compile/link option '-fno-stack-protector', however stack protection seems reasonable
+ * and a pre 2006 distribution a bit too 'far fetched' for our multimedia bindings anyway.
+ *
+ * Check build-in macro definitions via 'gcc -dM -E - < /dev/null'
+ */
+#if defined(__linux__) /* Actually we like to test whether we link against GLIBC .. */
+    #if defined(__GNUC__)
+        #if defined(__aarch64__)
+           /* glibc 2.17 is the first glibc version that support aarch64
+              however memcpy is not versioned for aarch64 */
+           #define GLIBC_COMPAT_SYMBOL(FFF)
+        #elif defined(__arm__)
+           /** On recent toolchain memcpy is no more versioned for arm 
+           #define GLIBC_COMPAT_SYMBOL(FFF) __asm__(".symver " #FFF "," #FFF "@GLIBC_2.4");
+            */
+           #define GLIBC_COMPAT_SYMBOL(FFF)
+        #elif defined(__amd64__)
+           #define GLIBC_COMPAT_SYMBOL(FFF) __asm__(".symver " #FFF "," #FFF "@GLIBC_2.2.5");
+        #else
+           #define GLIBC_COMPAT_SYMBOL(FFF) __asm__(".symver " #FFF "," #FFF "@GLIBC_2.0");
+        #endif /*__amd64__*/
+    #elif defined(__clang__)
+        #if defined(__aarch64__)
+           /* glibc 2.17 is the first glibc version that support aarch64
+              however memcpy is not versioned for aarch64 */
+           #define GLIBC_COMPAT_SYMBOL(FFF)
+        #elif defined(__arm__)
+           /** On recent toolchain memcpy is no more versioned for arm 
+           #define GLIBC_COMPAT_SYMBOL(FFF) __asm__(".symver " #FFF "," #FFF "@GLIBC_2.4");
+            */
+           #define GLIBC_COMPAT_SYMBOL(FFF)
+        #elif defined(__amd64__)
+           #define GLIBC_COMPAT_SYMBOL(FFF) asm(".symver " #FFF "," #FFF "@GLIBC_2.2.5");
+        #else
+           #define GLIBC_COMPAT_SYMBOL(FFF) asm(".symver " #FFF "," #FFF "@GLIBC_2.0");
+        #endif /*__amd64__*/
+    #else
+        #warning GLIBC_COMPAT_SYMBOL not supported with current compiler on GNU/Linux
+        #define GLIBC_COMPAT_SYMBOL(FFF)
+    #endif
+#else
+    #warning GLIBC_COMPAT_SYMBOL not supported with target OS
+    #define GLIBC_COMPAT_SYMBOL(FFF)
+#endif
+
+GLIBC_COMPAT_SYMBOL(memcpy)
+ 
+#endif /*__GLIBC_COMPAT_SYMBOLS_H__*/