Re: How to force using a module in Gnulib? (expl() on OpenBSD)

[Pádraig Brady]

On 04/16/2014 06:33 PM, Paul Eggert wrote:
> Pádraig Brady wrote:
>> +             [case $host_os in
>> +                mingw*) gl_cv_func_expl_buggy="guessing no";;
>> +                *) gl_cv_func_expl_buggy="guessing yes";;
>> +              esac])
> 
> Sorry, what does this have to do with mingw?  Why would we guess yes for 
> (say) glibc?
> 
> Instead, please guess no by default, and guess yes only on OpenBSD hosts.

Oh good point.
I thought it might have some unmentioned significance on mingw
but it's probably a copy & paste issue (from roundf.m4?),
especially since "guessing yes" would have never matched the
subsequent check anyway. I'll merge this in...

thanks!
Pádraig.

diff --git a/m4/expl.m4 b/m4/expl.m4
index 3e41589..fca810b 100644
--- a/m4/expl.m4
+++ b/m4/expl.m4
@@ -70,15 +70,16 @@ AC_DEFUN([gl_FUNC_EXPL],
                       isnan(expl(-0.4)); ]])],
              [gl_cv_func_expl_buggy=no], [gl_cv_func_expl_buggy=yes],
              [case $host_os in
-                mingw*) gl_cv_func_expl_buggy="guessing no";;
-                *) gl_cv_func_expl_buggy="guessing yes";;
+                openbsd*) gl_cv_func_expl_buggy="guessing yes";;
+                *) gl_cv_func_expl_buggy="guessing no";;
               esac])
           LIBS="$save_LIBS"
         ])
-    if test $gl_cv_func_expl_buggy = yes; then
-      gl_cv_func_expl_in_libm=no
-      gl_cv_func_expl_no_libm=no
-    fi
+    case "$gl_cv_func_expl_buggy" in
+      *yes)
+        gl_cv_func_expl_in_libm=no
+        gl_cv_func_expl_no_libm=no ;;
+    esac
   fi
   if test $gl_cv_func_expl_no_libm = yes \
      || test $gl_cv_func_expl_in_libm = yes; then