diff --git a/src/compress_ucl.cpp b/src/compress_ucl.cpp
index fadba7fd..33671814 100644
--- a/src/compress_ucl.cpp
+++ b/src/compress_ucl.cpp
@@ -34,7 +34,7 @@ int compress_ucl_dummy = 0;
 #else
 
 #if 1 && !(UCL_USE_ASM) && (ACC_ARCH_I386)
-#  if (ACC_CC_GNUC || ACC_CC_INTELC || ACC_CC_MSC || ACC_CC_WATCOMC)
+#  if (ACC_CC_CLANG || ACC_CC_GNUC || ACC_CC_INTELC || ACC_CC_MSC || ACC_CC_WATCOMC)
 #    define UCL_USE_ASM 1
 #  endif
 #endif
diff --git a/src/conf.h b/src/conf.h
index 963576db..cf0d1ab7 100644
--- a/src/conf.h
+++ b/src/conf.h
@@ -326,7 +326,7 @@
 
 #if (ACC_CC_INTELC && (__INTEL_COMPILER < 800))
 #elif (0 && (ACC_ARCH_AMD64 || ACC_ARCH_I386))
-#elif (ACC_CC_GNUC || ACC_CC_INTELC || ACC_CC_PATHSCALE)
+#elif (ACC_CC_CLANG || ACC_CC_GNUC || ACC_CC_INTELC || ACC_CC_PATHSCALE)
 #  define __packed_struct(s)        struct s {
 #  define __packed_struct_end()     } __attribute__((__packed__,__aligned__(1)));
 #elif (ACC_CC_WATCOMC)
@@ -752,7 +752,7 @@ typedef ElfLinker Linker;
 // main.cpp
 extern const char *progname;
 bool set_ec(int ec);
-#if (ACC_CC_GNUC || ACC_CC_LLVM || ACC_CC_PATHSCALE)
+#if (ACC_CC_CLANG || ACC_CC_GNUC || ACC_CC_LLVM || ACC_CC_PATHSCALE)
 void e_exit(int ec) __attribute__((__noreturn__));
 #else
 void e_exit(int ec);
@@ -764,7 +764,7 @@ void printSetNl(int need_nl);
 void printClearLine(FILE *f = NULL);
 void printErr(const char *iname, const Throwable *e);
 void printUnhandledException(const char *iname, const std::exception *e);
-#if (ACC_CC_GNUC || ACC_CC_LLVM || ACC_CC_PATHSCALE)
+#if (ACC_CC_CLANG || ACC_CC_GNUC || ACC_CC_LLVM || ACC_CC_PATHSCALE)
 void __acc_cdecl_va printErr(const char *iname, const char *format, ...)
         __attribute__((__format__(__printf__,2,3)));
 void __acc_cdecl_va printWarn(const char *iname, const char *format, ...)
@@ -774,7 +774,7 @@ void __acc_cdecl_va printErr(const char *iname, const char *format, ...);
 void __acc_cdecl_va printWarn(const char *iname, const char *format, ...);
 #endif
 
-#if (ACC_CC_GNUC || ACC_CC_LLVM || ACC_CC_PATHSCALE)
+#if (ACC_CC_CLANG || ACC_CC_GNUC || ACC_CC_LLVM || ACC_CC_PATHSCALE)
 void __acc_cdecl_va infoWarning(const char *format, ...)
         __attribute__((__format__(__printf__,1,2)));
 void __acc_cdecl_va infoHeader(const char *format, ...)
diff --git a/src/linker.h b/src/linker.h
index ca67b3d8..344178b7 100644
--- a/src/linker.h
+++ b/src/linker.h
@@ -84,7 +84,7 @@ public:
     //virtual void setLoaderAlignOffset(int phase);
     virtual int addLoader(const char *sname);
     void addLoader(const char *s, va_list ap);
-#if 1 && (ACC_CC_GNUC >= 0x040100)
+#if 1 && (ACC_CC_CLANG || (ACC_CC_GNUC >= 0x040100))
     void __acc_cdecl_va addLoaderVA(const char *s, ...) __attribute__((__sentinel__));
 #else
     void __acc_cdecl_va addLoaderVA(const char *s, ...);
diff --git a/src/main.cpp b/src/main.cpp
index e232e4ba..e256032d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1358,15 +1358,18 @@ void upx_sanity_check(void)
     assert(memcmp(UPX_VERSION_DATE + strlen(UPX_VERSION_DATE) - 4, UPX_VERSION_YEAR, 4) == 0);
 
 #if 1
+#if (ACC_CC_CLANG && ACC_ARCH_AMD64) // clang-2.8 bug
+#else
     assert(TestBELE<LE16>::test());
     assert(TestBELE<LE32>::test());
     assert(TestBELE<LE64>::test());
     assert(TestBELE<BE16>::test());
     assert(TestBELE<BE32>::test());
     assert(TestBELE<BE64>::test());
+#endif
     {
     static const unsigned char dd[32]
-#if 1 && (ACC_CC_GNUC || ACC_CC_INTELC || ACC_CC_PATHSCALE) && defined(__ELF__)
+#if 1 && (ACC_CC_CLANG || ACC_CC_GNUC || ACC_CC_INTELC || ACC_CC_PATHSCALE) && defined(__ELF__)
         __attribute__((__aligned__(16)))
 #endif
         = { 0, 0, 0, 0, 0, 0, 0,
diff --git a/src/packer.h b/src/packer.h
index b0a03ab9..c6248576 100644
--- a/src/packer.h
+++ b/src/packer.h
@@ -235,7 +235,7 @@ protected:
     void addLoader(C,C,C,C,C,C,C,C); void addLoader(C,C,C,C,C,C,C,C,C);
     void addLoader(C,C,C,C,C,C,C,C,C,C);
 #undef C
-#if 1 && (ACC_CC_GNUC >= 0x040100)
+#if 1 && (ACC_CC_CLANG || (ACC_CC_GNUC >= 0x040100))
     void __acc_cdecl_va addLoaderVA(const char *s, ...) __attribute__((__sentinel__));
 #else
     void __acc_cdecl_va addLoaderVA(const char *s, ...);