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Patch reverts upstream commit:
https://github.com/collectd/collectd/commit/6124da7a48f28f54fc09ebeb942d1037516fe6ab
The commit changed the detection path due to FreeBSD issues,
but apparently affects also Openwrt buildroot negatively.
Original explanation:
From 6124da7a48f28f54fc09ebeb942d1037516fe6ab Mon Sep 17 00:00:00 2001
Subject: [PATCH] Fix libmodbus detection on FreeBSD
We look for modbus/modbus.h in /usr/local/include/modbus
but we should look for modbus.h
This is only an issue on FreeBSD since /usr/local/include is not
in the default search path.
Reversed patch to be applied:
--- a/configure.ac
+++ b/configure.ac
@@ -3385,9 +3385,9 @@ if test "x$with_libmodbus" = "xyes"; the
SAVE_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $with_libmodbus_cflags"
- AC_CHECK_HEADERS([modbus.h],
+ AC_CHECK_HEADERS([modbus/modbus.h],
[with_libmodbus="yes"],
- [with_libmodbus="no (modbus.h not found)"]
+ [with_libmodbus="no (modbus/modbus.h not found)"]
)
CPPFLAGS="$SAVE_CPPFLAGS"
--- a/src/modbus.c
+++ b/src/modbus.c
@@ -26,7 +26,7 @@
#include "plugin.h"
#include "utils/common/common.h"
-#include <modbus.h>
+#include <modbus/modbus.h>
#include <netdb.h>
#include <sys/socket.h>
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