libcurl: fix build on uncommon architectures

new file mode 100644
index 0000000..94d9a2a
@@ -0,0 +1,47 @@
+From 7d84bd820ef412d251b643a4faced105668f4ebd Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <[email protected]>
+Date: Fri, 11 Aug 2017 18:52:37 +0200
+Subject: [PATCH] curl/system.h: support more architectures
+
+The long list of architectures in include/curl/system.h is annoying to
+maintain, and needs to be extended for each and every architecture to
+support.
+
+Instead, let's rely on the __SIZEOF_LONG__ define of the gcc compiler
+(we are in the GNUC condition anyway), which tells us if long is 4
+bytes or 8 bytes.
+
+This fixes the build of libcurl 7.55.0 on architectures such as
+OpenRISC or ARC.
+
+Signed-off-by: Thomas Petazzoni <[email protected]>
+---
+ include/curl/system.h | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/include/curl/system.h b/include/curl/system.h
+index 79abf8f..0e13075 100644
+--- a/include/curl/system.h
++++ b/include/curl/system.h
+@@ -403,7 +403,7 @@
+ #  if !defined(__LP64__) && (defined(__ILP32__) || \
+       defined(__i386__) || defined(__ppc__) || defined(__arm__) || \
+       defined(__sparc__) || defined(__mips__) || defined(__sh__) || \
+-      defined(__XTENSA__))
++      defined(__XTENSA__) || (defined(__SIZEOF_LONG__) && __SIZEOF_LONG__ == 4))
+ #    define CURL_SIZEOF_LONG           4
+ #    define CURL_TYPEOF_CURL_OFF_T     long long
+ #    define CURL_FORMAT_CURL_OFF_T     "lld"
+@@ -412,7 +412,8 @@
+ #    define CURL_SUFFIX_CURL_OFF_T     LL
+ #    define CURL_SUFFIX_CURL_OFF_TU    ULL
+ #  elif defined(__LP64__) || \
+-        defined(__x86_64__) || defined(__ppc64__) || defined(__sparc64__)
++        defined(__x86_64__) || defined(__ppc64__) || defined(__sparc64__) || \
++        (defined(__SIZEOF_LONG__) && __SIZEOF_LONG__ == 8)
+ #    define CURL_SIZEOF_LONG           8
+ #    define CURL_TYPEOF_CURL_OFF_T     long
+ #    define CURL_FORMAT_CURL_OFF_T     "ld"
+-- 
+2.9.4
+