[PATCH] cmake/modules/config_sysconfig: Allow configuration of sysconfig module

Checking whether the host system has /etc/sysconfig is not deterministic
when cross compiling. Allow this to be disabled by adding a configure
option for it. OpenEmbedded can set this and have deterministic build
output independent of the host OS.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Upstream-Status: Submitted [https://github.com/libproxy/libproxy/pull/160]

Index: libproxy-0.4.17/libproxy/cmake/modules/config_sysconfig.cmk
===================================================================
--- libproxy-0.4.17.orig/libproxy/cmake/modules/config_sysconfig.cmk
+++ libproxy-0.4.17/libproxy/cmake/modules/config_sysconfig.cmk
@@ -1,5 +1,8 @@
 if (NOT WIN32 AND NOT APPLE)
-  if (EXISTS "/etc/sysconfig" AND IS_DIRECTORY "/etc/sysconfig")
-    set(SYSCONFIG_FOUND 1)
+  option(WITH_SYSCONFIG "Build sysconfig module for /etc/sysconfig" ON)
+  if(WITH_SYSCONFIG)
+    if (EXISTS "/etc/sysconfig" AND IS_DIRECTORY "/etc/sysconfig")
+      set(SYSCONFIG_FOUND 1)
+    endif()
   endif()
 endif()
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