netchild's mega-patch to isolate compiler dependencies into a central

place.

This moves the dependency on GCC's and other compiler's features into
the central sys/cdefs.h file, while the individual source files can
then refer to #ifdef __COMPILER_FEATURE_FOO where they by now used to
refer to #if __GNUC__ > 3.1415 && __BARC__ <= 42.

By now, GCC and ICC (the Intel compiler) have been actively tested on
IA32 platforms by netchild.  Extension to other compilers is supposed
to be possible, of course.

Submitted by:	netchild
Reviewed by:	various developers on arch@, some time ago

1 files changed, 7 insertions, 3 deletions

diff --git a/sys/ia64/include/cpufunc.h b/sys/ia64/include/cpufunc.h
index 29563fe8b83e..27d66ef63947 100644
--- a/sys/ia64/include/cpufunc.h
+++ b/sys/ia64/include/cpufunc.h
@@ -35,11 +35,15 @@
 #include <machine/ia64_cpu.h>
 #include <machine/vmparam.h>
 
+#ifndef _SYS_CDEFS_H_
+#error this file needs sys/cdefs.h as a prerequisite
+#endif
+
 struct thread;
 
 #define	IA64_FIXED_BREAK	0x84B5D
 
-#ifdef __GNUC__
+#ifdef __GNUCLIKE_ASM
 
 static __inline void
 breakpoint(void)
@@ -50,8 +54,6 @@ breakpoint(void)
 #define	HAVE_INLINE_FFS
 #define	ffs(x)	__builtin_ffs(x)
 
-#endif
-
 extern uint64_t ia64_port_base;
 #define	__MEMIO_ADDR(x)		(__volatile void*)(IA64_PHYS_TO_RR6(x))
 #define	__PIO_ADDR(x)		(__volatile void*)(ia64_port_base |	\
@@ -208,6 +210,8 @@ intr_restore(register_t ie)
 		enable_intr();
 }
 
+#endif /* __GNUCLIKE_ASM */
+
 #endif /* _KERNEL */
 
 #endif /* !_MACHINE_CPUFUNC_H_ */