ubuntu-buildroot/output/build/glibc-2.36-81-g4f4d7a13edfd.../sysdeps/mips/configure.ac

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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/mips.
dnl No MIPS GCC supports accessing static and hidden symbols in an
dnl position independent way.
AC_DEFINE(HIDDEN_VAR_NEEDS_DYNAMIC_RELOC)
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)])
if test x$libc_cv_mips_nan2008 = xyes; then
AC_DEFINE(HAVE_MIPS_NAN2008)
fi