Thanks Nick and Peter for your analysis. Yes, the "AC_" prefix fooled me, that AC_CHECK_DEFINE belongs to autoconf. > On 2023-09-23, Nick Bowler <nbowler@xxxxxxxxxx> wrote: > > On 2023-09-23, Detlef Riekenberg <wine.dev@xxxxxx> wrote: > >> AC_CHECK_DEFINE(__unix, CFLAGS="-DFOUND__unix $CFLAGS") > >> AC_CHECK_DEFINE(__unix__, CFLAGS="-DFOUND__unix__ $CFLAGS") > >> AC_CHECK_DEFINE(__linux__, CFLAGS="-DFOUND__linux__ $CFLAGS") > [...] > > So it sounds like there must be some third party code involved which > > is defining this macro (and this code is defining macros in the AC_* > > namespace to make it look like it came from Autoconf when in fact it > > did not). I can confirm, that i have the "autoconf-archive" package insalled. The installed "/usr/share/aclocal/ax_check_define.m4" contains AC_CHECK_DEFINE and AX_CHECK_DEFINE > Just to add, you don't need any third party macros to check for typical > C predefined macros including __unix, etc. I would write such checks > something like this (untested): > > AC_COMPUTE_INT([unix_val], [__unix], [@&t@], [unix_val=0]) > AS_IF([test $unix_val -ne 0], > [put code here to run when __unix is defined and is non-zero]) Learned something new. Thanks The magic "[@&t@]" is really strange. > Hope that helps, Sure. Thanks -- Regards ... Detlef
