Mine
public text v1 · immutablesection of configure.in:
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tslib_libs=""
AC_CHECK_HEADER(tslib.h,
[
tslib_libs="-ltslib"
AC_DEFINE(HAVE_TSLIB, 1, [Build Ecore_X Module])
],[
AC_MSG_RESULT("No tslib header found. No tslib support being built")
]
)
AC_SUBST(tslib_libs)
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Bails with: error: possibly undefined macro: AC_DEFINE