51 lines
1.4 KiB
Makefile
51 lines
1.4 KiB
Makefile
# $NetBSD: endian.mk,v 1.2 2002/08/14 02:38:25 grant Exp $
|
|
#
|
|
# Determine the endianness of the platform by checking header files.
|
|
#
|
|
# This file is used as follows:
|
|
#
|
|
# .include "../../mk/endian.mk"
|
|
#
|
|
# .if ${MACHINE_ENDIAN} == "big"
|
|
# # ...big endian stuff...
|
|
# .elif ${MACHINE_ENDIAN} == "little"
|
|
# # ...little endian stuff...
|
|
# .else
|
|
# BROKEN= "Unknown endianness"
|
|
# .endif
|
|
|
|
.include "../../mk/bsd.prefs.mk"
|
|
.if !defined(MACHINE_ENDIAN)
|
|
_ENDIAN_H_FILES= /usr/include/endian.h # Linux
|
|
_ENDIAN_H_FILES+= /usr/include/sys/endian.h # NetBSD=>1.5
|
|
_ENDIAN_H_FILES+= /usr/include/machine/endian.h # NetBSD<1.5
|
|
_ENDIAN_H_FILES+= /usr/include/sys/byteorder.h # Solaris
|
|
_ENDIAN_H_FILES+= /dev/null
|
|
. for FILE in ${_ENDIAN_H_FILES}
|
|
. if !defined(_ENDIAN_H)
|
|
. if exists(${FILE})
|
|
_ENDIAN_H?= ${FILE:S/\/usr\/include\///}
|
|
. endif
|
|
. endif
|
|
. endfor
|
|
MACHINE_ENDIAN!= \
|
|
byte_order=` \
|
|
( \
|
|
${ECHO} "\#include <${_ENDIAN_H}>"; \
|
|
${ECHO} "\#ifndef BYTE_ORDER"; \
|
|
${ECHO} "\#ifdef _BIG_ENDIAN"; \
|
|
${ECHO} "\#define BYTE_ORDER 4321"; \
|
|
${ECHO} "\#else"; \
|
|
${ECHO} "\#define BYTE_ORDER 1234"; \
|
|
${ECHO} "\#endif"; \
|
|
${ECHO} "\#endif"; \
|
|
${ECHO} "BYTE_ORDER"; \
|
|
) | ${CC} -E - | ${EGREP} "^(1234|4321)" \
|
|
`; \
|
|
case `${ECHO} $${byte_order}` in \
|
|
1234) ${ECHO} little ;; \
|
|
4321) ${ECHO} big ;; \
|
|
*) ${ECHO} unknown ;; \
|
|
esac
|
|
MAKEFLAGS+= MACHINE_ENDIAN="${MACHINE_ENDIAN}"
|
|
.endif
|