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New configure test from Ian Lance Taylor <ian@airs.com>:

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If the target is an i386, this test checks whether or not the binutils
  is new enough to have good support for code16.
This commit is contained in:
Joel Sherrill
1998-09-30 19:51:31 +00:00
parent 1dedfde98f
commit 5620149cd6
1 changed files with 25 additions and 0 deletions
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25
aclocal/i386-gas-code16.m4 Normal file
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@@ -0,0 +1,25 @@
dnl
dnl $Id$
dnl
dnl check for i386 gas supporting 16 bit mode
AC_DEFUN(RTEMS_I386_GAS_CODE16,
if test "${target_cpu}" = "i386"; then
AC_CACHE_CHECK([for 16 bit mode assembler support],
rtems_cv_prog_gas_code16,
[cat > conftest.s << EOF
.code16
data32 addr32 lgdt 0
EOF
if AC_TRY_COMMAND($AS_FOR_TARGET -o conftest.o conftest.s); then
rtems_cv_prog_gas_code16=yes
else
rtems_cv_prog_gas_code16=no
fi])
if test "$rtems_cv_prog_gas_code16" = "yes"; then
AC_DEFINE(RTEMS_PROG_GAS_CODE16)
fi
fi
)