Top-level configure has two quadmath-related options: --disable-libquadmath and
--disable-libquadmath-support . The first disables the building of libquadmath
itself, the second disables quadmath support in the Fortran front-end. They are
currently independent, but it would make a lot of sense for
--disable-libquadmath to imply --disable-libquadmath-support, unless
—enable-libquadmath-support is explicitly stated: Fortran front-end support
without libquadmath will be truly useless, and the current situation is
confusing to users (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55601).
However, my build/configure-foo is lacking, so I don’t know to achieve this.
I’ve tried the code below… is it how this is supposed to work?
Thanks in advance to any build/configure maintainer who can give me a hand with
this!
Index: configure.ac
===================================================================
--- configure.ac (revision 211315)
+++ configure.ac (working copy)
@@ -411,7 +411,9 @@ AS_HELP_STRING([--disable-libquadmath-su
ENABLE_LIBQUADMATH_SUPPORT=$enableval,
ENABLE_LIBQUADMATH_SUPPORT=yes)
enable_libquadmath_support=
-if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
+if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ||
+ ( test "${ENABLE_LIBQUADMATH_SUPPORT}" = "" &&
+ test "${ENABLE_LIBQUADMATH}" = "no" ) ; then
enable_libquadmath_support=no
fi
