adapt get_lz4.sh

common/get_lz4.sh

@@ -5,9 +5,26 @@ unzip -o -j v$version "lz4-$version/LICENSE" "lz4-$version/lib/lz4.h" "lz4-$vers
 rm v$version.zip
 patch -p0 << EOF
 diff -Naur lz4/lz4.c lz4/lz4.c
---- lz4/lz4.c	2019-08-15 13:59:59.000000000 +0200
-+++ lz4/lz4.c	2020-06-07 12:50:11.788924953 +0200
-@@ -1650,7 +1650,7 @@
+--- lz4/lz4.c
++++ lz4/lz4.c
+@@ -1270,6 +1270,7 @@ int LZ4_compress_default(const char* src, char* dst, int srcSize, int maxOutputS
+ }
+ 
+ 
++int LZ4_compress_fast_force(const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
+ /* hidden debug function */
+ /* strangely enough, gcc generates faster code when this function is uncommented, even if unused */
+ int LZ4_compress_fast_force(const char* src, char* dst, int srcSize, int dstCapacity, int acceleration)
+@@ -1644,13 +1645,16 @@ read_variable_length(const BYTE**ip, const BYTE* lencheck, int loop_check, int i
+   return length;
+ }
+ 
++int LZ4_decompress_generic(const char* const src, char* const dst, int srcSize, int outputSize, endCondition_directive endOnInput, earlyEnd_directive partialDecoding,
++                 dict_directive dict, const BYTE* const lowPrefix, const BYTE* const dictStart, const size_t dictSize );
++
+ /*! LZ4_decompress_generic() :
+  *  This generic decompression function covers all use cases.
+  *  It shall be instantiated several times, using different sets of directives.
   *  Note that it is important for performance that this function really get inlined,
   *  in order to remove useless branches during compilation optimization.
   */