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, 5 insertions, 1 deletions

diff --git a/sys/dev/iir/iir.h b/sys/dev/iir/iir.h
index 667a8d299ec2..ad5528d8bc7c 100644
--- a/sys/dev/iir/iir.h
+++ b/sys/dev/iir/iir.h
@@ -47,6 +47,10 @@
 #ifndef _IIR_H
 #define _IIR_H
 
+#ifndef _SYS_CDEFS_H_
+#error this file needs sys/cdefs.h as a prerequisite
+#endif
+
 #define IIR_DRIVER_VERSION      1
 #define IIR_DRIVER_SUBVERSION   5
 
@@ -699,7 +703,7 @@ void    iir_free(struct gdt_softc *);
 void    iir_attach(struct gdt_softc *);
 void    iir_intr(void *arg);
 
-#if defined( __GNUC__) || defined(__INTEL_COMPILER)
+#ifdef __CC_SUPPORTS___INLINE__
 /* These all require correctly aligned buffers */
 static __inline__ void gdt_enc16(u_int8_t *, u_int16_t);
 static __inline__ void gdt_enc32(u_int8_t *, u_int32_t);