Avoid asprintf() which is not available on mingw

[qemu.git] / compiler.h

diff --git a/compiler.h b/compiler.h
index a1c0794947766226733de71de1051aff42d79805..07ba1f81139c6ad1203ea22345a79a20b392ed7b 100644 (file)
--- a/compiler.h
+++ b/compiler.h
@@ -30,8 +30,10 @@
 # define QEMU_PACKED __attribute__((packed))
 #endif
 
+#define cat(x,y) x ## y
+#define cat2(x,y) cat(x,y)
 #define QEMU_BUILD_BUG_ON(x) \
-    typedef char qemu_build_bug_on__##__LINE__[(x)?-1:1];
+    typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1];
 
 #if defined __GNUC__
 # if !QEMU_GNUC_PREREQ(4, 4)
@@ -43,6 +45,13 @@
 #  define GCC_ATTR __attribute__((__unused__, format(gnu_printf, 1, 2)))
 #  define GCC_FMT_ATTR(n, m) __attribute__((format(gnu_printf, n, m)))
 # endif
+#if defined(_WIN32)
+#define GCC_WEAK __attribute__((weak))
+#define GCC_WEAK_DECL GCC_WEAK
+#else
+#define GCC_WEAK __attribute__((weak))
+#define GCC_WEAK_DECL
+#endif
 #else
 #define GCC_ATTR /**/
 #define GCC_FMT_ATTR(n, m)