Compilation Error Help

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Posts: 9
Joined: 28 Apr 2020

zoushenliang

afs/sftp.cpp:67:50: error: ‘MAX_SFTP_READ_SIZE’ was not declared in this scope
67 | const size_t SFTP_OPTIMAL_BLOCK_SIZE_READ = 8 * MAX_SFTP_READ_SIZE;
Posts: 306
Joined: 7 Jan 2018

bgstack15

That happens all the time. It's got something to do with that variable name not being a public variable in the libssh2 headers.
Here's my patch for it:
Source: <none>
 Author: B Stack
 Message: The upstream author observed that some of the values he uses are not in the libssh2 public headers. I don't know where he uses them from, but I had to replace them here to get this to compile.
 Date: 2019-02-11T12:15:59Z
 https://github.com/libssh2/libssh2/issues/90
 diff -x '*.rej' -x '*.orig' -x '*.git*' -Naur 10.24-0/FreeFileSync/Source/afs/sftp.cpp 10.24-1/FreeFileSync/Source/afs/sftp.cpp
 --- 10.24-0/FreeFileSync/Source/afs/sftp.cpp 2020-05-17 11:01:12.821889929 -0400
 +++ 10.24-1/FreeFileSync/Source/afs/sftp.cpp 2020-05-17 11:37:50.229446467 -0400
 @@ -63,10 +63,10 @@
                                              LIBSSH2_SFTP_S_IROTH | LIBSSH2_SFTP_S_IXOTH;
 //attention: if operation fails due to time out, e.g. file copy, the cleanup code may hang, too => total delay = 2 x time out interval
 -
 -const size_t SFTP_OPTIMAL_BLOCK_SIZE_READ  = 8 * MAX_SFTP_READ_SIZE;     //https://github.com/libssh2/libssh2/issues/90
 -const size_t SFTP_OPTIMAL_BLOCK_SIZE_WRITE = 8 * MAX_SFTP_OUTGOING_SIZE; //
 -static_assert(MAX_SFTP_READ_SIZE == 30000 && MAX_SFTP_OUTGOING_SIZE == 30000, "reevaluate optimal block sizes if these constants change!");
 +// these values are all manually derived from https://github.com/libssh2/libssh2/blob/master/src/sftp.h which for some weak reason are not included in the libssh2-devel headers.
 +const size_t SFTP_OPTIMAL_BLOCK_SIZE_READ  = 8 * 30000;     //https://github.com/libssh2/libssh2/issues/90
 +const size_t SFTP_OPTIMAL_BLOCK_SIZE_WRITE = 8 * 30000; //
 +//static_assert(MAX_SFTP_READ_SIZE == 30000 && MAX_SFTP_OUTGOING_SIZE == 30000, "reevaluate optimal block sizes if these constants change!");
 /* Perf Test, Sourceforge frs, SFTP upload, compressed 25 MB test file: