Failed to find EVP_MD_CTX_copy function in openssl crypto lib.
RolandK via rsync <[email protected]> Wed, 25 Feb 2026 20:01:05 +0100
| Newsgroups | gmane.network.rsync.general |
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hello,
does anybody have clue why rsync compile of latest rsync bails out with=20
this error ?
i'm trying to do a static build on debian 13
./configure CFLAGS=3D"-static"
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
<snip>
checking for library containing EVP_MD_CTX_copy... no
checking whether to enable MD5 ASM optimizations... no
checking whether to enable rolling-checksum ASM optimizations... no
checking whether to enable xxhash checksum support... yes
checking for library containing XXH64_createState... -lxxhash
checking whether to enable zstd compression... yes
checking for library containing ZSTD_minCLevel... -lzstd
checking whether to enable LZ4 compression... yes
checking for library containing LZ4_compress_default... -llz4
Configure found the following issues:
- Failed to find EVP_MD_CTX_copy function in openssl crypto lib.
See the INSTALL file for hints on how to install the missing libraries=20
and/or
how to generate (or fetch) manpages:
https://github.com/RsyncProject/rsync/blob/master/INSTALL.md
To disable one or more features, the relevant configure options are:
=C2=A0 =C2=A0 --disable-openssl
configure.sh: error: Aborting configure run
when removing static option it builds fine
i grepped through 3.4.1 sources but it seems EVP_MD_CTX_copy isn't being=
=20
used there at all, there is only check for it in configure.sh
libcrypt/libcrypto.a for static linking ( from package libssl-dev=20
3.5.4-1~deb13u2 ) does seem to be there and it also contains that function
root@vm1:/tmp/rsync-3.4.1# ./configure |grep EVP
checking for library containing EVP_MD_CTX_copy... -lcrypto
# find /usr/ -name "*.a" |grep crypto
/usr/lib/x86_64-linux-gnu/libcrypto.a
/usr/lib/x86_64-linux-gnu/libcrypto++.a
/usr/lib/x86_64-linux-gnu/libcryptopp.a
# nm -g --defined-only /usr/lib/x86_64-linux-gnu/libcrypto.a 2>&1 |grep=20
EVP_MD_CTX_copy
0000000000001ba0 T EVP_MD_CTX_copy
00000000000016f0 T EVP_MD_CTX_copy_ex
so what's going on here ?
regards
ps:
https://github.com/RsyncProject/rsync/issues/823
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<p>hello,=C2=A0<br>
<br>
does anybody have clue why rsync compile of latest rsync bails out
with this error ?<br>
<br>
i'm trying to do a static build on debian 13<br>
<br>
./configure CFLAGS=3D"-static"<br>
checking for gcc... gcc<br>
checking whether the C compiler works... yes<br>
checking for C compiler default output file name... a.out<br>
checking for suffix of executables...<br>
<snip><br>
checking for library containing EVP_MD_CTX_copy... no<br>
checking whether to enable MD5 ASM optimizations... no<br>
checking whether to enable rolling-checksum ASM optimizations...
no<br>
checking whether to enable xxhash checksum support... yes<br>
checking for library containing XXH64_createState... -lxxhash<br>
checking whether to enable zstd compression... yes<br>
checking for library containing ZSTD_minCLevel... -lzstd<br>
checking whether to enable LZ4 compression... yes<br>
checking for library containing LZ4_compress_default... -llz4<br>
<br>
Configure found the following issues:<br>
<br>
- Failed to find EVP_MD_CTX_copy function in openssl crypto lib.<br>
<br>
See the INSTALL file for hints on how to install the missing
libraries and/or<br>
how to generate (or fetch) manpages:<br>
=C2=A0 =C2=A0 <a class=3D"moz-txt-link-freetext" href=3D"https://git=
hub.com/RsyncProject/rsync/blob/master/INSTALL.md">https://github.com/Rsyn=
cProject/rsync/blob/master/INSTALL.md</a><br>
<br>
To disable one or more features, the relevant configure options
are:<br>
=C2=A0 =C2=A0 --disable-openssl<br>
<br>
configure.sh: error: Aborting configure run<br>
<br>
when removing static option it builds fine<br>
<br>
i grepped through 3.4.1 sources but it seems EVP_MD_CTX_copy isn't
being used there at all, there is only check for it in
configure.sh<br>
<br>
libcrypt/libcrypto.a for static linking ( from package libssl-dev
3.5.4-1~deb13u2 ) does seem to be there and it also contains that
function<br>
<br>
<a class=3D"moz-txt-link-abbreviated" href=3D"mailto:root@vm1:/tmp/r=
sync-3.4.1#">root@vm1:/tmp/rsync-3.4.1#</a> ./configure |grep EVP<br>
checking for library containing EVP_MD_CTX_copy... -lcrypto<br>
<br>
# find /usr/ -name "*.a" |grep crypto<br>
/usr/lib/x86_64-linux-gnu/libcrypto.a<br>
/usr/lib/x86_64-linux-gnu/libcrypto++.a<br>
/usr/lib/x86_64-linux-gnu/libcryptopp.a<br>
<br>
# nm -g --defined-only /usr/lib/x86_64-linux-gnu/libcrypto.a
2>&1 |grep EVP_MD_CTX_copy<br>
0000000000001ba0 T EVP_MD_CTX_copy<br>
00000000000016f0 T EVP_MD_CTX_copy_ex<span><br>
</span><br>
so what's going on here ?<br>
<br>
regards<br>
<br>
ps:<br>
<a class=3D"moz-txt-link-freetext" href=3D"https://github.com/RsyncP=
roject/rsync/issues/823">https://github.com/RsyncProject/rsync/issues/823<=
/a></p>
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