diff options
Diffstat (limited to 'm4/modf.m4')
| -rw-r--r-- | m4/modf.m4 | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/m4/modf.m4 b/m4/modf.m4 index 43a6696758..07495f036b 100644 --- a/m4/modf.m4 +++ b/m4/modf.m4 @@ -1,4 +1,4 @@ -# modf.m4 serial 2 +# modf.m4 serial 3 dnl Copyright (C) 2011-2012 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -14,6 +14,7 @@ AC_DEFUN([gl_FUNC_MODF], m4_ifdef([gl_FUNC_MODF_IEEE], [ if test $gl_modf_required = ieee && test $REPLACE_MODF = 0; then + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether modf works according to ISO C 99 with IEC 60559], [gl_cv_func_modf_ieee], [ @@ -59,7 +60,13 @@ int main (int argc, char *argv[]) ]])], [gl_cv_func_modf_ieee=yes], [gl_cv_func_modf_ieee=no], - [gl_cv_func_modf_ieee="guessing no"]) + [case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_modf_ieee="guessing yes" ;; + # If we don't know, assume the worst. + *) gl_cv_func_modf_ieee="guessing no" ;; + esac + ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_modf_ieee" in |