Official autoconf docs contraindicate the use of the $sysconfdir
variable in configure.ac. For reference:
https://www.gnu.org/software/autoconf/manual/autoconf-2.63/html_node/Installation-Directory-Variables.html
The macro SYSCONFDIR (ordinarilly set to "/etc") is required to find
a system configuration file installed with i3. In some build setups,
this may not be defined properly in when the configure script is
compiled.
Instead, define this variable in AM_CPPFLAGS as the documentation
indicates.
fixes #2832
endif
AM_CPPFLAGS = \
+ -DSYSCONFDIR="\"$(sysconfdir)\"" \
-I$(top_builddir)/parser \
-I$(top_srcdir)/include \
@AX_EXTEND_SRCDIR_CPPFLAGS@
AC_PROG_CC_C99
-AC_DEFINE_UNQUOTED(SYSCONFDIR, "`eval echo $sysconfdir`", [Location of system configuration files])
-
# For strnlen() and vasprintf().
AC_USE_SYSTEM_EXTENSIONS