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Compilation fails due to zstd qcow2 compression
Compilation of QEMU fails when using recent versions of zstd.
I use the following commands to compile QEMU:
$ mkdir build
$ cd build
$ ../configure --enable-debug --target-list=x86_64-softmmu
$ make -j $(nproc)
Here is a paste from the ../configure output:
https://paste.ubuntu.com/p/dHsWzGV7TH/
And one from the make output:
https://paste.ubuntu.com/p/89qKk4NrFz/
In short the error boils down to:
../block/qcow2-threads.c: In function ‘qcow2_zstd_compress’:
../block/qcow2-threads.c:225:16: error: implicit declaration of function ‘ZSTD_compressStream2’; did you mean ‘ZSTD_compressStream’? [-Werror=implicit-function-declaration]
225 | zstd_ret = ZSTD_compressStream2(cctx, &output, &input, ZSTD_e_end);
| ^~~~~~~~~~~~~~~~~~~~
| ZSTD_compressStream
../block/qcow2-threads.c:225:16: error: nested extern declaration of ‘ZSTD_compressStream2’ [-Werror=nested-externs]
../block/qcow2-threads.c:225:60: error: ‘ZSTD_e_end’ undeclared (first use in this function)
225 | zstd_ret = ZSTD_compressStream2(cctx, &output, &input, ZSTD_e_end);
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System info:
QEMU commit: 7ef8134565dccf9186d5eabd7dbb4ecae6dead87 (from Github)
Kernel: 5.10.15
zstd: 1.4.8
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