[build] Enable building with the Intel C compiler (icc)

src/arch/i386/Makefile

@@ -4,22 +4,33 @@ CFLAGS		+= -march=i386
 
 # Code size reduction.
 #
-CFLAGS		+= -fstrength-reduce -fomit-frame-pointer
+CFLAGS		+= -fomit-frame-pointer
+
+# Code size reduction.
+#
+ifeq ($(CCTYPE),gcc)
+CFLAGS		+= -fstrength-reduce
+endif
 
 # Code size reduction.  gcc3 needs a different syntax to gcc2 if you
 # want to avoid spurious warnings.
 #
+ifeq ($(CCTYPE),gcc)
 GCC_VERSION	:= $(subst ., ,$(shell $(CC) -dumpversion))
 GCC_MAJOR	:= $(firstword $(GCC_VERSION))
 ifeq ($(GCC_MAJOR),2)
 CFLAGS		+= -malign-jumps=1 -malign-loops=1 -malign-functions=1
 else
 CFLAGS		+= -falign-jumps=1 -falign-loops=1 -falign-functions=1
-endif
+endif # gcc2
+endif # gcc
 
-# Code size reduction.  This is almost always a win.  The kernel uses it, too.
+# Code size reduction.  This is almost always a win.  The kernel uses
+# it, too.
 #
+ifeq ($(CCTYPE),gcc)
 CFLAGS		+= -mpreferred-stack-boundary=2
+endif
 
 # Code size reduction.  Use regparm for all functions - C functions
 # called from assembly (or vice versa) need __asmcall now
@@ -27,7 +38,9 @@ CFLAGS		+= -mpreferred-stack-boundary=2
 CFLAGS		+= -mregparm=3
 
 # Code size reduction.  Use -mrtd (same __asmcall requirements as above)
+ifeq ($(CCTYPE),gcc)
 CFLAGS		+= -mrtd
+endif
 
 # Code size reduction.  This is the logical complement to -mregparm=3.
 # It doesn't currently buy us anything, but if anything ever tries to

src/arch/i386/drivers/net/undiload.c

@@ -90,11 +90,10 @@ int undi_load ( struct undi_device *undi, struct undi_rom *undirom ) {
 	undi_loader_entry = undirom->loader_entry;
 	__asm__ __volatile__ ( REAL_CODE ( "pushw %%ds\n\t"
 					   "pushw %%ax\n\t"
-					   "lcall *%c2\n\t"
+					   "lcall *undi_loader_entry\n\t"
 					   "addw $4, %%sp\n\t" )
 			       : "=a" ( exit )
-			       : "a" ( __from_data16 ( &undi_loader ) ),
-			         "p" ( __from_data16 ( &undi_loader_entry ) )
+			       : "a" ( __from_data16 ( &undi_loader ) )
 			       : "ebx", "ecx", "edx", "esi", "edi", "ebp" );
 
 	/* UNDI API calls may rudely change the status of A20 and not

src/arch/i386/drivers/net/undinet.c

@@ -173,12 +173,11 @@ static int undinet_call ( struct undi_nic *undinic, unsigned int function,
 	__asm__ __volatile__ ( REAL_CODE ( "pushw %%es\n\t"
 					   "pushw %%di\n\t"
 					   "pushw %%bx\n\t"
-					   "lcall *%c3\n\t"
+					   "lcall *undinet_entry_point\n\t"
 					   "addw $6, %%sp\n\t" )
 			       : "=a" ( exit ), "=b" ( discard_b ),
 			         "=D" ( discard_D )
-			       : "p" ( __from_data16 ( &undinet_entry_point )),
-			         "b" ( function ),
+			       : "b" ( function ),
 			         "D" ( __from_data16 ( &undinet_params ) )
 			       : "ecx", "edx", "esi", "ebp" );