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Index: sys/sys/cdefs.h
===================================================================
--- sys/sys/cdefs.h
+++ sys/sys/cdefs.h
@@ -42,6 +42,10 @@
#error "_KERNEL and _STANDALONE are mutually exclusive"
#endif
+#if !defined(__GNUC__)
+#error "Requires a compiler that supports gcc defines"
+#endif
+
/*
* Testing against Clang-specific extensions.
*/
@@ -75,8 +79,6 @@
* having a compiler-agnostic source tree.
*/
-#if defined(__GNUC__)
-
#if __GNUC__ >= 3
#define __GNUCLIKE_ASM 3
#define __GNUCLIKE_MATH_BUILTIN_CONSTANTS
@@ -97,23 +99,18 @@
#define __GNUCLIKE_BUILTIN_VAALIST 1
#endif
-#if defined(__GNUC__)
#define __GNUC_VA_LIST_COMPATIBILITY 1
-#endif
/*
* Compiler memory barriers, specific to gcc and clang.
*/
-#if defined(__GNUC__)
#define __compiler_membar() __asm __volatile(" " : : : "memory")
-#endif
#define __GNUCLIKE_BUILTIN_NEXT_ARG 1
#define __GNUCLIKE_MATH_BUILTIN_RELOPS
#define __GNUCLIKE_BUILTIN_MEMCPY 1
-/* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */
#define __CC_SUPPORTS_INLINE 1
#define __CC_SUPPORTS___INLINE 1
#define __CC_SUPPORTS___INLINE__ 1
@@ -125,17 +122,11 @@
#define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1
-#endif /* __GNUC__ */
-
/*
* Macro to test if we're using a specific version of gcc or later.
*/
-#if defined(__GNUC__)
#define __GNUC_PREREQ__(ma, mi) \
(__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
-#else
-#define __GNUC_PREREQ__(ma, mi) 0
-#endif
/*
* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
@@ -389,7 +380,7 @@
#define __func__ NULL
#endif
-#if (defined(__GNUC__) && __GNUC__ >= 2) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
+#if __GNUC__ >= 2 && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
#define __LONG_LONG_SUPPORTED
#endif
@@ -525,15 +516,9 @@
#endif
/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
-#if defined(__FreeBSD_cc_version) && __FreeBSD_cc_version >= 300001 && \
- defined(__GNUC__)
#define __printf0like(fmtarg, firstvararg) \
__attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
-#else
-#define __printf0like(fmtarg, firstvararg)
-#endif
-#if defined(__GNUC__)
#define __strong_reference(sym,aliassym) \
extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
#ifdef __STDC__
@@ -561,22 +546,11 @@
#define __sym_default(impl,sym,verid) \
__asm__(".symver impl, sym@@@verid")
#endif /* __STDC__ */
-#endif /* __GNUC__ */
#define __GLOBL1(sym) __asm__(".globl " #sym)
#define __GLOBL(sym) __GLOBL1(sym)
-#if defined(__GNUC__)
#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
-#else
-/*
- * The following definition might not work well if used in header files,
- * but it should be better than nothing. If you want a "do nothing"
- * version, then it should generate some harmless declaration, such as:
- * #define __IDSTRING(name,string) struct __hack
- */
-#define __IDSTRING(name,string) static const char name[] __unused = string
-#endif
/*
* Embed the rcs id of a source file in the resulting library. Note that in

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