diff options
Diffstat (limited to 'gnulib-m4/exponentl.m4')
| -rw-r--r-- | gnulib-m4/exponentl.m4 | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/gnulib-m4/exponentl.m4 b/gnulib-m4/exponentl.m4 index c49cf2c3..ebfebe49 100644 --- a/gnulib-m4/exponentl.m4 +++ b/gnulib-m4/exponentl.m4 @@ -1,11 +1,12 @@ -# exponentl.m4 serial 3 -dnl Copyright (C) 2007-2016 Free Software Foundation, Inc. +# exponentl.m4 serial 4 +dnl Copyright (C) 2007-2017 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_LONG_DOUBLE_EXPONENT_LOCATION], [ AC_REQUIRE([gl_BIGENDIAN]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([where to find the exponent in a 'long double'], [gl_cv_cc_long_double_expbit0], [ @@ -79,9 +80,24 @@ int main () [gl_cv_cc_long_double_expbit0=`cat conftest.out`], [gl_cv_cc_long_double_expbit0="unknown"], [ - dnl When cross-compiling, we don't know. It depends on the + dnl When cross-compiling, in general we don't know. It depends on the dnl ABI and compiler version. There are too many cases. gl_cv_cc_long_double_expbit0="unknown" + case "$host_os" in + mingw*) # On native Windows (little-endian), we know the result + # in two cases: mingw, MSVC. + AC_EGREP_CPP([Known], [ +#ifdef __MINGW32__ + Known +#endif + ], [gl_cv_cc_long_double_expbit0="word 2 bit 0"]) + AC_EGREP_CPP([Known], [ +#ifdef _MSC_VER + Known +#endif + ], [gl_cv_cc_long_double_expbit0="word 1 bit 20"]) + ;; + esac ]) rm -f conftest.out ]) |