diff options
Diffstat (limited to 'gnulib-m4/signbit.m4')
| -rw-r--r-- | gnulib-m4/signbit.m4 | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/gnulib-m4/signbit.m4 b/gnulib-m4/signbit.m4 index e42f183..db60ab7 100644 --- a/gnulib-m4/signbit.m4 +++ b/gnulib-m4/signbit.m4 @@ -1,5 +1,5 @@ -# signbit.m4 serial 13 -dnl Copyright (C) 2007-2016 Free Software Foundation, Inc. +# signbit.m4 serial 15 +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. @@ -31,6 +31,8 @@ AC_DEFUN([gl_SIGNBIT], [case "$host_os" in # Guess yes on glibc systems. *-gnu*) gl_cv_func_signbit="guessing yes" ;; + # Guess yes on native Windows. + mingw*) gl_cv_func_signbit="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_signbit="guessing no" ;; esac @@ -60,6 +62,13 @@ AC_DEFUN([gl_SIGNBIT], [case "$host_os" in # Guess yes on glibc systems. *-gnu*) gl_cv_func_signbit_gcc="guessing yes" ;; + # Guess yes on mingw, no on MSVC. + mingw*) if test -n "$GCC"; then + gl_cv_func_signbit_gcc="guessing yes" + else + gl_cv_func_signbit_gcc="guessing no" + fi + ;; # If we don't know, assume the worst. *) gl_cv_func_signbit_gcc="guessing no" ;; esac @@ -272,6 +281,7 @@ int main () { /* More than one bit difference. */ fprintf (fp, "unknown"); + fclose (fp); return 2; } if (x) @@ -284,6 +294,7 @@ int main () { /* No difference. */ fprintf (fp, "unknown"); + fclose (fp); return 3; } /* Now m = plus.word[k] ^ ~minus.word[k]. */ @@ -292,6 +303,7 @@ int main () /* Oh? The sign bit is set in the positive and cleared in the negative numbers? */ fprintf (fp, "unknown"); + fclose (fp); return 4; } for (i = 0; ; i++) |