diff options
Diffstat (limited to 'macros/i386-gas-code16.m4')
| -rw-r--r-- | macros/i386-gas-code16.m4 | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/macros/i386-gas-code16.m4 b/macros/i386-gas-code16.m4 new file mode 100644 index 0000000000..8bfb2a5859 --- /dev/null +++ b/macros/i386-gas-code16.m4 @@ -0,0 +1,28 @@ +dnl +dnl $Id$ +dnl + +dnl check for i386 gas supporting 16 bit mode +dnl - binutils 2.9.1.0.7 and higher + +AC_DEFUN(RTEMS_I386_GAS_CODE16, +[ if test "${host_cpu}" = "i386"; then + AC_CACHE_CHECK([for 16 bit mode assembler support], + rtems_cv_prog_gas_code16, + [cat > conftest.s << EOF + .code16 + data32 + addr32 + lgdt 0 +EOF + if AC_TRY_COMMAND($AS -o conftest.o conftest.s); then + rtems_cv_prog_gas_code16=yes + else + rtems_cv_prog_gas_code16=no + fi]) + RTEMS_GAS_CODE16="$rtems_cv_prog_gas_code16" + fi + AC_SUBST(RTEMS_GAS_CODE16) + AC_DEFINE_UNQUOTED(NEW_GAS,1,[if using 16 bit mode assembler support]) +]) + |