[Bug 1786543] [NEW] [bionic] Program fails to compile when using flann and LZ4
Public bug reported:
On Ubuntu 18.04, when trying to use the system version of LZ4 with flann
in the same C++ code, it causes compile errors.
$ apt-cache policy libflann-dev
libflann-dev:
Installed: 1.9.1+dfsg-2
Candidate: 1.9.1+dfsg-2
Version table:
*** 1.9.1+dfsg-2 500
500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
100 /var/lib/dpkg/status
$ apt-cache policy liblz4-dev
liblz4-dev:
Installed: 0.0~r131-2ubuntu3
Candidate: 0.0~r131-2ubuntu3
Version table:
*** 0.0~r131-2ubuntu3 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
$ cat test.cpp
#include
#include
int main()
{
return 0;
}
$ g++ test.cpp
In file included from /usr/include/flann/util/serialization.h:9:0,
from /usr/include/flann/util/matrix.h:35,
from /usr/include/flann/flann.hpp:41,
from test.cpp:2:
/usr/include/flann/ext/lz4.h:196:57: error: conflicting declaration 'typedef
struct LZ4_stream_t LZ4_stream_t'
typedef struct { long long table[LZ4_STREAMSIZE_U64]; } LZ4_stream_t;
^~~~
In file included from test.cpp:1:0:
/usr/include/lz4.h:196:57: note: previous declaration as 'typedef struct
LZ4_stream_t LZ4_stream_t'
typedef struct { long long table[LZ4_STREAMSIZE_U64]; } LZ4_stream_t;
^~~~
In file included from /usr/include/flann/util/serialization.h:9:0,
from /usr/include/flann/util/matrix.h:35,
from /usr/include/flann/flann.hpp:41,
from test.cpp:2:
/usr/include/flann/ext/lz4.h:249:72: error: conflicting declaration 'typedef
struct LZ4_streamDecode_t LZ4_streamDecode_t'
typedef struct { unsigned long long table[LZ4_STREAMDECODESIZE_U64]; }
LZ4_streamDecode_t;
^~
In file included from test.cpp:1:0:
/usr/include/lz4.h:249:72: note: previous declaration as 'typedef struct
LZ4_streamDecode_t LZ4_streamDecode_t'
typedef struct { unsigned long long table[LZ4_STREAMDECODESIZE_U64]; }
LZ4_streamDecode_t;
^~
** Affects: flann (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1786543
Title:
[bionic] Program fails to compile when using flann and LZ4
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