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sinclude(./aclocal.m4)dnl Autoconf lossage
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/unix/sysv/linux/mips.
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (_MIPS_SIM != _ABIO32)
#error Not O32 ABI
#endif])],
[libc_mips_abi=o32],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (_MIPS_SIM != _ABIN32)
#error Not N32 ABI
#endif])],
[libc_mips_abi=n32],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (_MIPS_SIM != _ABI64)
#error Not 64 ABI
#endif])],
[libc_mips_abi=n64],
[])])])
if test -z "$libc_mips_abi"; then
AC_MSG_ERROR([could not determine what ABI the compiler is using])
fi
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if !defined(__mips_soft_float)
#error Not soft ABI
#endif])],
[libc_mips_float=soft],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if !defined(__mips_hard_float)
#error Not hard ABI
#endif])],
[libc_mips_float=hard],
[])])
if test -z "$libc_mips_float"; then
AC_MSG_ERROR([could not determine if compiler is using hard or soft floating point ABI])
fi
libc_mips_o32_fp=
libc_cv_mips_fp64=
libc_cv_mips_modd_spreg=
if test x"$libc_mips_abi" = xo32 -a x"$libc_mips_float" = xhard; then
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if !defined(__mips_fpr)
#error Missing FPR sizes
#endif])],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (__mips_fpr != 32)
#error Not FP32
#endif])],
[libc_mips_o32_fp=32],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (__mips_fpr != 0) || !defined(_MIPS_SPFPSET) || (_MIPS_SPFPSET != 16)
#error Not FPXX (without odd single-precision registers)
#endif])],
[libc_mips_o32_fp=xx],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (__mips_fpr != 0)
#error Not FPXX (with odd single precision registers)
#endif])],
[libc_mips_o32_fp=xxo],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (__mips_fpr != 64) || !defined(_MIPS_SPFPSET) || (_MIPS_SPFPSET != 16)
#error Not FP64A
#endif])],
[libc_mips_o32_fp=64a],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#if (__mips_fpr != 64)
#error Not FP64
#endif])],
[libc_mips_o32_fp=64],
[])])])])])],
[])
LIBC_TRY_CC_OPTION([-mfp64], [libc_cv_mips_fp64=yes], [libc_cv_mips_fp64=no])
LIBC_TRY_CC_OPTION([-Werror -modd-spreg], [libc_cv_mips_modd_spreg=yes], [libc_cv_mips_modd_spreg=no])
fi
LIBC_CONFIG_VAR([o32-fpabi],[${libc_mips_o32_fp}])
LIBC_CONFIG_VAR([has-mpf64],[${libc_cv_mips_fp64}])
LIBC_CONFIG_VAR([has-modd-spreg],[${libc_cv_mips_modd_spreg}])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#include <linux/prctl.h>
#if !defined(PR_GET_FP_MODE) || !defined(PR_SET_FP_MODE)
#error New prctl support for setting FP modes not found
#endif])],
[libc_mips_mode_switch=yes],
[libc_mips_mode_switch=no])
LIBC_CONFIG_VAR([mips-mode-switch],[${libc_mips_mode_switch}])
AC_CACHE_CHECK([whether the compiler is using the 2008 NaN encoding],
libc_cv_mips_nan2008, [AC_EGREP_CPP(yes, [dnl
#ifdef __mips_nan2008
yes
#endif], libc_cv_mips_nan2008=yes, libc_cv_mips_nan2008=no)])
libc_mips_nan=
if test x"$libc_cv_mips_nan2008" = xyes; then
libc_mips_nan=_2008
fi
LIBC_CONFIG_VAR([default-abi],
[${libc_mips_abi}_${libc_mips_float}${libc_mips_nan}])
case $machine in
mips/mips64/n64/*)
LIBC_SLIBDIR_RTLDDIR([lib64], [lib64])
;;
mips/mips64/n32/*)
LIBC_SLIBDIR_RTLDDIR([lib32], [lib32])
;;
esac
libc_cv_gcc_unwind_find_fde=yes
if test -z "$arch_minimum_kernel"; then
if test x$libc_cv_mips_nan2008 = xyes; then
arch_minimum_kernel=4.5.0
fi
fi
# Check if we are supposed to run on kernels older than 4.8.0. If so,
# force executable stack to avoid potential runtime problems with fpu
# emulation.
# NOTE: The check below assumes that in absence of user-provided minumum_kernel
# we will default to arch_minimum_kernel which is currently less than 4.8.0 for
# all known configurations. If this changes, the check must be updated.
AC_CACHE_CHECK([whether the compiler must use executable stack],
libc_cv_mips_force_execstack, [dnl
libc_cv_mips_force_execstack=no
if test $libc_mips_float = hard; then
if test -n "$minimum_kernel"; then
changequote(,)
min_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
changequote([,])
if test $min_version -lt 264192; then
libc_cv_mips_force_execstack=yes
fi
else
libc_cv_mips_force_execstack=yes
fi
fi])
libc_mips_has_gnustack=$libc_cv_as_noexecstack
if test $libc_cv_mips_force_execstack = yes; then
libc_mips_has_gnustack=no
AC_MSG_WARN([forcing executable stack for pre-4.8.0 Linux kernels])
fi
LIBC_CONFIG_VAR([mips-force-execstack],[${libc_cv_mips_force_execstack}])
LIBC_CONFIG_VAR([mips-has-gnustack],[${libc_mips_has_gnustack}])
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