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-rw-r--r--configure.ac4
1 files changed, 4 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 6f1f521..b91444f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,5 +41,9 @@ int main(void) {
[AC_MSG_ERROR([Cross compiling is not supported.])]
)
+# Older autoconf (2.59, for example) doesn't define docdir
+[[ -n "$docdir" ]] && docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
+AC_SUBST([docdir])
+
AC_CONFIG_FILES([Makefile doc/Makefile src/Makefile])
AC_OUTPUT