Merge pull request #10 from raoulstrackx/raoul/libunwind_clang_support

Support for compilation with clang

Author: jethrogb

libunwind/src/CMakeLists.txt

@@ -56,7 +56,11 @@ if (RUST_SGX)
     # on older platforms.
     #
     # See https://github.com/rust-lang/rust/issues/34978
-    list(APPEND LIBUNWIND_COMPILE_FLAGS -Wa,-mrelax-relocations=no)
+    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+        list(APPEND LIBUNWIND_COMPILE_FLAGS -Wa,-mrelax-relocations=no)
+    else()
+        list(APPEND LIBUNWIND_COMPILE_FLAGS)
+    endif()
 
     # Sources
     list(APPEND LIBUNWIND_C_SOURCES UnwindRustSgx.c)
@@ -119,9 +123,9 @@ string(REPLACE ";" " " LIBUNWIND_C_FLAGS "${LIBUNWIND_C_FLAGS}")
 string(REPLACE ";" " " LIBUNWIND_LINK_FLAGS "${LIBUNWIND_LINK_FLAGS}")
 
 set_property(SOURCE ${LIBUNWIND_CXX_SOURCES}
-             APPEND_STRING PROPERTY COMPILE_FLAGS " ${CMAKE_CXX_FLAGS} ${LIBUNWIND_CXX_FLAGS}")
+             APPEND_STRING PROPERTY COMPILE_FLAGS " ${LIBUNWIND_CXX_FLAGS}")
 set_property(SOURCE ${LIBUNWIND_C_SOURCES}
-             APPEND_STRING PROPERTY COMPILE_FLAGS " ${CMAKE_C_FLAGS} ${LIBUNWIND_C_FLAGS}")
+             APPEND_STRING PROPERTY COMPILE_FLAGS " ${LIBUNWIND_C_FLAGS}")
 
 # Add a object library that contains the compiled source files.
 add_library(unwind_objects OBJECT ${LIBUNWIND_SOURCES} ${LIBUNWIND_HEADERS})

libunwind/src/UnwindLevel1.c

@@ -19,7 +19,10 @@
 // to export these functions from libunwind.so as well.
 #define _LIBUNWIND_UNWIND_LEVEL1_EXTERNAL_LINKAGE 1
 
+#ifndef __clang__
 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#endif
+
 #pragma GCC diagnostic ignored "-Wempty-body"
 
 #include <inttypes.h>

libunwind/src/UnwindRustSgx.c

@@ -17,6 +17,7 @@
 #include <stddef.h>
 #include "UnwindRustSgx.h"
 
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 
 #define max_log 256
 

libunwind/src/UnwindRustSgxSnprintf.c

@@ -5,8 +5,13 @@
  * on all source code distributions
  */
 
-#pragma GCC diagnostic ignored "-Wconversion"
+#ifndef __clang__
 #pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
+#else
+#pragma GCC diagnostic ignored "-Wincompatible-pointer-types-discards-qualifiers"
+#endif
+
+#pragma GCC diagnostic ignored "-Wconversion"
 #pragma GCC diagnostic ignored "-Wfloat-conversion"
 #pragma GCC diagnostic ignored "-Wsign-conversion"
 #pragma GCC diagnostic ignored "-Wstrict-overflow"

libunwind/src/libunwind.cpp

@@ -10,7 +10,11 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef __clang__
 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #pragma GCC diagnostic ignored "-Wmissing-braces"
 #pragma GCC diagnostic ignored "-Wsign-conversion"
 #pragma GCC diagnostic ignored "-Wstrict-aliasing"