On 2020-03-23, Ross Burton <invalid.nore...@gnu.org> wrote:
> apt 1.2.31 builds fine with autoconf 2.69. With git master:
>
> | checking for h_errno... configure: error: "not found."
>
> That code is:
>
> dnl HP-UX needs -d_XOPEN_SOURCE_EXTENDED for h_errno
> AC_MSG_CHECKING(for h_errno)
> AC_EGREP_HEADER(h_errno, netdb.h, [AC_MSG_RESULT(normal)],
> [CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
> AC_EGREP_HEADER(h_errno, netdb.h,
> [AC_MSG_RESULT(needs _XOPEN_SOURCE_EXTENDED)],
> [AC_MSG_ERROR("not found.")])
> ])
>
> Obviously this is horrible, but it's out there.
Can you expand more on what is failing for you? I just copy+pasted the
above code into the following configure script:
% cat >configure.ac <<'EOF'
AC_INIT([test], [0])
dnl HP-UX needs -d_XOPEN_SOURCE_EXTENDED for h_errno
AC_MSG_CHECKING(for h_errno)
AC_EGREP_HEADER(h_errno, netdb.h, [AC_MSG_RESULT(normal)],
[CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED"
AC_EGREP_HEADER(h_errno, netdb.h,
[AC_MSG_RESULT(needs _XOPEN_SOURCE_EXTENDED)],
[AC_MSG_ERROR("not found.")])
])
AC_OUTPUT
EOF
This seems to work perfectly fine with current autoconf master (ignoring
the slightly mangled output due to the example being a bit contrived):
% autoconf --version
autoconf (GNU Autoconf) 2.69.209-8a09
[...]
% autoconf
% cat >netdb.h <<'EOF'
#if GATE && _XOPEN_SOURCE_EXTENDED
int h_errno;
#endif
EOF
% ./configure CPPFLAGS='-I.'
[...]
configure: error: "not found."
% ./configure CPPFLAGS='-I. -DGATE'
[...]
needs _XOPEN_SOURCE_EXTENDED
% ./configure CPPFLAGS='-I. -DGATE -D_XOPEN_SOURCE_EXTENDED'
[...]
normal
Which appears to be exactly as expected for this configure test.
Cheers,
Nick
