Index: PLATFORMS.md
==================================================================
--- PLATFORMS.md
+++ PLATFORMS.md
@@ -7,11 +7,11 @@
 
 Linux
 -----
 
  * Architectures: x86, x86_64
- * Compilers: Clang 3.1, GCC 4.7.1
+ * Compilers: Clang 3.0-3.1, GCC 4.7.1
  * Runtimes: ObjFW
 
 
 MacOS X
 -------

Index: src/atomic.h
==================================================================
--- src/atomic.h
+++ src/atomic.h
@@ -639,11 +639,11 @@
 	    "xorl	%0, %0\n\t"
 	    "lock\n\t"
 	    "cmpxchg	%2, %3\n\t"
 	    "sete	%b0\n\t"
 	    "movzbl	%b0, %0"
-	    : "=&r"(r)
+	    : "=&d"(r)	/* use d instead of r due to gcc bug */
 	    : "a"(o), "r"(n), "m"(*p)
 	);
 
 	return r;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)
@@ -670,11 +670,11 @@
 	    "xorl	%0, %0\n\t"
 	    "lock\n\t"
 	    "cmpxchg	%2, %3\n\t"
 	    "sete	%b0\n\t"
 	    "movzbl	%b0, %0"
-	    : "=&r"(r)
+	    : "=&d"(r)	/* use d instead of r due to gcc bug */
 	    : "a"(o), "r"(n), "m"(*p)
 	);
 
 	return r;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)
@@ -701,11 +701,11 @@
 	    "xorl	%0, %0\n\t"
 	    "lock\n\t"
 	    "cmpxchg	%2, %3\n\t"
 	    "sete	%b0\n\t"
 	    "movzbl	%b0, %0"
-	    : "=&r"(r)
+	    : "=&d"(r)	/* use d instead of r due to gcc bug */
 	    : "a"(o), "r"(n), "m"(*p)
 	);
 
 	return r;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)