[PATCH] Using '-mpentium' or '-mpentiumpro' with the new compilers.

Niels Kristian Bech Jensen (nkbj@image.dk)
Thu, 14 May 1998 13:36:29 +0200 (CEST)

Hi,
This small patch detects if you use a compiler that supports the
'-mpentium' and '-mpentiumpro' compiler flags and use the relevant flag
for building the kernel. I haven't tested it with gcc-2.7.* compilers, so
please let me know if it works.

All comments are welcome.

diff -urN linux-pre-2.1.102-1/arch/i386/Makefile linux/arch/i386/Makefile
--- linux-pre-2.1.102-1/arch/i386/Makefile Sat May 9 05:32:37 1998
+++ linux/arch/i386/Makefile Thu May 14 13:15:49 1998
@@ -13,6 +13,8 @@
# Copyright (C) 1994 by Linus Torvalds
#

+CC_MAJOR_VERSION := $(shell $(CC) -v 2>&1 | tail -1 | cut -b 13-15)
+
AS86 =$(CROSS_COMPILE)as86 -0 -a
AS386 =$(CROSS_COMPILE)as86 -3
LD86 =$(CROSS_COMPILE)ld86 -0
@@ -36,11 +38,19 @@
endif

ifdef CONFIG_M586
+ifeq ($(CC_MAJOR_VERSION),2.7)
CFLAGS := $(CFLAGS) -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DCPU=586
+else
+CFLAGS := $(CFLAGS) -mpentium -DCPU=586
+endif
endif

ifdef CONFIG_M686
+ifeq ($(CC_MAJOR_VERSION),2.7)
CFLAGS := $(CFLAGS) -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DCPU=686
+else
+CFLAGS := $(CFLAGS) -mpentiumpro -DCPU=686
+endif
endif

ifdef SMP

--
Med venlig hilsen / Best regards
                                                              nkbj@image.dk
Niels Kristian Bech Jensen                       http://www.image.dk/~nkbj/




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