failure to detect format of `double' on MS-Windows

[Vincent Lefevre]

Hi,

With 17862:b1ea8c11ae1e, I get:

$ ./configure '--host=i586-mingw32msvc' '--disable-shared' 'host_alias=i586-mingw32msvc'
[...]
checking format of `double' floating point... od: conftest: No such file or directory
od: conftest: No such file or directory
unknown 
configure: WARNING: Could not determine float format.
configure: WARNING: Conversions to and from "double" may be slow.
[...]

One needs to change "conftest" to "conftest$EXEEXT".
Patch attached.

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
-------------- next part --------------
diff -r b1ea8c11ae1e acinclude.m4
--- a/acinclude.m4	Wed Sep 04 06:18:08 2019 +0200
+++ b/acinclude.m4	Wed Sep 04 15:15:00 2019 +0200
@@ -3316,7 +3316,7 @@
   return 0;
 }]
 EOF
-gmp_compile="$CC $CFLAGS $CPPFLAGS conftest.c -o conftest >&AC_FD_CC 2>&1"
+gmp_compile="$CC $CFLAGS $CPPFLAGS conftest.c -o conftest$EXEEXT >&AC_FD_CC 2>&1"
 if AC_TRY_EVAL(gmp_compile); then
 cat >conftest.awk <<\EOF
 [
@@ -3469,11 +3469,11 @@
 }
 ]
 EOF
-  gmp_cv_c_double_format=`od -b conftest | $AWK -f conftest.awk`
+  gmp_cv_c_double_format=`od -b conftest$EXEEXT | $AWK -f conftest.awk`
   case $gmp_cv_c_double_format in
   unknown*)
-    echo "cannot match anything, conftest contains" >&AC_FD_CC
-    od -b conftest >&AC_FD_CC
+    echo "cannot match anything, conftest$EXEEXT contains" >&AC_FD_CC
+    od -b conftest$EXEEXT >&AC_FD_CC
     ;;
   esac
 else