Error: failed to run custom build command for `openssl-sys v0.9.92` with

1

After upgrading to rust v1.86.0 and building it with poky the following error is observed:

 error: failed to run custom build command for `openssl-sys v0.9.92`
Caused by:
  process didn't exit successfully: `home/poky/build/tmp/work/x86_64-linux/rust-native/1.86.0/rustc-1.86.0-src/build/x86_64-unknown-linux-gnu/stage2-tools/release/build/openssl-sys-59fd9a385ef5252b/build-script-main` (exit status: 101)
.
.
.
 cargo:rerun-if-env-changed=HOST_PKG_CONFIG_SYSROOT_DIR
  cargo:rerun-if-env-changed=PKG_CONFIG_SYSROOT_DIR
  run pkg_config fail: Could not run `PKG_CONFIG_PATH=/home/poky/build/tmp/work/x86_64-linux/rust-native/1.86.0/recipe-sysroot-native/usr/lib/pkgconfig:/home/poky/build/tmp/work/x86_64-linux/rust-native/1.86.0/recipe-sysroot-native/usr/share/pkgconfig PKG_CONFIG_LIBDIR=/home/poky/build/tmp/work/x86_64-linux/rust-native/1.86.0/recipe-sysroot-native/usr/lib/pkgconfig PKG_CONFIG_SYSROOT_DIR= PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 pkg-config --libs --cflags openssl`
  The pkg-config command could not be found.

  Most likely, you need to install a pkg-config package for your OS.
  Try `apt install pkg-config`, or `yum install pkg-config`,
  or `pkg install pkg-config`, or `apk add pkgconfig` depending on your distribution.

  If you've already installed it, ensure the pkg-config command is one of the
  directories in the PATH environment variable.

  If you did not expect this build to link to a pre-installed system library,
  then check documentation of the openssl-sys crate for an option to
  build the library from source, or disable features or dependencies
  that require pkg-config.

  --- stderr

  thread 'main' panicked at /rust/deps/openssl-sys-0.9.92/build/find_normal.rs:190:5:


  Could not find directory of OpenSSL installation, and this `-sys` crate cannot
  proceed without this knowledge. If OpenSSL is installed and this crate had
  trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the
  compilation process.

  Make sure you also have the development packages of openssl installed.
  For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.

  If you're in a situation where you think the directory *should* be found
  automatically, please open a bug at https://github.com/sfackler/rust-openssl
  and include information about your system as well as this message.

  $HOST = x86_64-unknown-linux-gnu
  $TARGET = x86_64-unknown-linux-gnu
  openssl-sys = 0.9.92


  It looks like you're compiling on Linux and also targeting Linux. Currently this
  requires the `pkg-config` utility to find OpenSSL but unfortunately `pkg-config`
  could not be found. If you have OpenSSL installed you can likely fix this by
  installing `pkg-config`.


  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...

I already followed the following issue threads but could not get a proper fix even after re-installing openssl and pkg-config.

Please assist me with fixing this build error.
Thanks.

CC: @bjorn3

My system information for the packages is as follows:

$ ls /usr/share/pkgconfig/ 
adwaita-icon-theme.pc  dmxproto.pc    fontutil.pc    poppler-data.pc   scrnsaverproto.pc    xcmiscproto.pc       xineramaproto.pc
applewmproto.pc        dpmsproto.pc   glproto.pc     presentproto.pc   shared-mime-info.pc  xextproto.pc         xkbcomp.pc
bash-completion.pc     dri2proto.pc   inputproto.pc  randrproto.pc     systemd.pc           xf86bigfontproto.pc  xkeyboard-config.pc
bigreqsproto.pc        dri3proto.pc   iso-codes.pc   recordproto.pc    udev.pc              xf86dgaproto.pc      xorg-sgml-doctools.pc
compositeproto.pc      fixesproto.pc  kbproto.pc     renderproto.pc    videoproto.pc        xf86driproto.pc      xproto.pc
damageproto.pc         fontsproto.pc  m17n-db.pc     resourceproto.pc  xbitmaps.pc          xf86vidmodeproto.pc  xtrans.pc

$ ls /usr/lib/x86_64-linux-gnu/pkgconfig/ 
alsa.pc          glib-2.0.pc               libdrm_amdgpu.pc   libpcre2-posix.pc          libtirpc.pc    pciaccess.pc          tinfo.pc
blkid.pc         gl.pc                     libdrm_intel.pc    libpcre32.pc               libxcrypt.pc   pixman-1.pc           uuid.pc
caca++.pc        glu.pc                    libdrm_nouveau.pc  libpcrecpp.pc              menu.pc        pthread-stubs.pc      x11.pc
caca.pc          glx.pc                    libdrm.pc          libpcre.pc                 menuw.pc       python-3.10-embed.pc  xau.pc
dri.pc           gmodule-2.0.pc            libdrm_radeon.pc   libpcreposix.pc            mount.pc       python-3.10.pc        xcb.pc
egl.pc           gmodule-export-2.0.pc     libelf.pc          libpng16.pc                ncurses++.pc   python-3.6m.pc        xdmcp.pc
expat.pc         gmodule-no-export-2.0.pc  libffi.pc          libpng.pc                  ncurses.pc     python-3.6.pc         xext.pc
form.pc          gobject-2.0.pc            libglvnd.pc        libpulse-mainloop-glib.pc  ncurses++w.pc  python3-embed.pc      zlib.pc
formw.pc         gthread-2.0.pc            libnsl.pc          libpulse.pc                ncursesw.pc    python3.pc
gio-2.0.pc       libconfig.pc              libpcre16.pc       libpulse-simple.pc         opengl.pc      sdl.pc
gio-unix-2.0.pc  libcrypto.pc              libpcre2-16.pc     libselinux.pc              openssl.pc     slang.pc
glesv1_cm.pc     libcrypt.pc               libpcre2-32.pc     libsepol.pc                panel.pc       sqlite3.pc
glesv2.pc        libcurl.pc                libpcre2-8.pc      libssl.pc                  panelw.pc      tic.pc

$ dpkg -l | grep libssl
ii  libssl-dev:amd64                       3.0.2-0ubuntu1.19                       amd64        Secure Sockets Layer toolkit - development files
ii  libssl1.0.0:amd64                      1.0.2n-1ubuntu5.10                      amd64        Secure Sockets Layer toolkit - shared libraries
ii  libssl1.1:amd64                        1.1.1f-1ubuntu2.16                      amd64        Secure Sockets Layer toolkit - shared libraries
rc  libssl1.1:i386                         1.1.1f-1ubuntu2.16                      i386         Secure Sockets Layer toolkit - shared libraries
ii  libssl3:amd64                          3.0.2-0ubuntu1.19                       amd64        Secure Sockets Layer toolkit - shared libraries
ii  libssl3:i386                           3.0.2-0ubuntu1.19                       i386         Secure Sockets Layer toolkit - shared libraries

$ dpkg -L libssl-dev 
/.
/usr
/usr/include
/usr/include/openssl
/usr/include/openssl/aes.h
/usr/include/openssl/asn1.h
/usr/include/openssl/asn1_mac.h
/usr/include/openssl/asn1err.h
/usr/include/openssl/asn1t.h
/usr/include/openssl/async.h
/usr/include/openssl/asyncerr.h
/usr/include/openssl/bio.h
/usr/include/openssl/bioerr.h
/usr/include/openssl/blowfish.h
/usr/include/openssl/bn.h
/usr/include/openssl/bnerr.h
/usr/include/openssl/buffer.h
/usr/include/openssl/buffererr.h
/usr/include/openssl/camellia.h
/usr/include/openssl/cast.h
/usr/include/openssl/cmac.h
/usr/include/openssl/cmp.h
/usr/include/openssl/cmp_util.h
/usr/include/openssl/cmperr.h
/usr/include/openssl/cms.h
/usr/include/openssl/cmserr.h
/usr/include/openssl/comp.h
/usr/include/openssl/comperr.h
/usr/include/openssl/conf.h
/usr/include/openssl/conf_api.h
/usr/include/openssl/conferr.h
/usr/include/openssl/conftypes.h
/usr/include/openssl/core.h
/usr/include/openssl/core_dispatch.h
/usr/include/openssl/core_names.h
/usr/include/openssl/core_object.h
/usr/include/openssl/crmf.h
/usr/include/openssl/crmferr.h
/usr/include/openssl/crypto.h
/usr/include/openssl/cryptoerr.h
/usr/include/openssl/cryptoerr_legacy.h
/usr/include/openssl/ct.h
/usr/include/openssl/cterr.h
/usr/include/openssl/decoder.h
/usr/include/openssl/decodererr.h
/usr/include/openssl/des.h
/usr/include/openssl/dh.h
/usr/include/openssl/dherr.h
/usr/include/openssl/dsa.h
/usr/include/openssl/dsaerr.h
/usr/include/openssl/dtls1.h
/usr/include/openssl/e_os2.h
/usr/include/openssl/ebcdic.h
/usr/include/openssl/ec.h
/usr/include/openssl/ecdh.h
/usr/include/openssl/ecdsa.h
/usr/include/openssl/ecerr.h
/usr/include/openssl/encoder.h
/usr/include/openssl/encodererr.h
/usr/include/openssl/engine.h
/usr/include/openssl/engineerr.h
/usr/include/openssl/err.h
/usr/include/openssl/ess.h
/usr/include/openssl/esserr.h
/usr/include/openssl/evp.h
/usr/include/openssl/evperr.h
/usr/include/openssl/fips_names.h
/usr/include/openssl/fipskey.h
/usr/include/openssl/hmac.h
/usr/include/openssl/http.h
/usr/include/openssl/httperr.h
/usr/include/openssl/idea.h
/usr/include/openssl/kdf.h
/usr/include/openssl/kdferr.h
/usr/include/openssl/lhash.h
/usr/include/openssl/macros.h
/usr/include/openssl/md2.h
/usr/include/openssl/md4.h
/usr/include/openssl/md5.h
/usr/include/openssl/mdc2.h
/usr/include/openssl/modes.h
/usr/include/openssl/obj_mac.h
/usr/include/openssl/objects.h
/usr/include/openssl/objectserr.h
/usr/include/openssl/ocsp.h
/usr/include/openssl/ocsperr.h
/usr/include/openssl/opensslv.h
/usr/include/openssl/ossl_typ.h
/usr/include/openssl/param_build.h
/usr/include/openssl/params.h
/usr/include/openssl/pem.h
/usr/include/openssl/pem2.h
/usr/include/openssl/pemerr.h
/usr/include/openssl/pkcs12.h
/usr/include/openssl/pkcs12err.h
/usr/include/openssl/pkcs7.h
/usr/include/openssl/pkcs7err.h
/usr/include/openssl/prov_ssl.h
/usr/include/openssl/proverr.h
/usr/include/openssl/provider.h
/usr/include/openssl/rand.h
/usr/include/openssl/randerr.h
/usr/include/openssl/rc2.h
/usr/include/openssl/rc4.h
/usr/include/openssl/rc5.h
/usr/include/openssl/ripemd.h
/usr/include/openssl/rsa.h
/usr/include/openssl/rsaerr.h
/usr/include/openssl/safestack.h
/usr/include/openssl/seed.h
/usr/include/openssl/self_test.h
/usr/include/openssl/sha.h
/usr/include/openssl/srp.h
/usr/include/openssl/srtp.h
/usr/include/openssl/ssl.h
/usr/include/openssl/ssl2.h
/usr/include/openssl/ssl3.h
/usr/include/openssl/sslerr.h
/usr/include/openssl/sslerr_legacy.h
/usr/include/openssl/stack.h
/usr/include/openssl/store.h
/usr/include/openssl/storeerr.h
/usr/include/openssl/symhacks.h
/usr/include/openssl/tls1.h
/usr/include/openssl/trace.h
/usr/include/openssl/ts.h
/usr/include/openssl/tserr.h
/usr/include/openssl/txt_db.h
/usr/include/openssl/types.h
/usr/include/openssl/ui.h
/usr/include/openssl/uierr.h
/usr/include/openssl/whrlpool.h
/usr/include/openssl/x509.h
/usr/include/openssl/x509_vfy.h
/usr/include/openssl/x509err.h
/usr/include/openssl/x509v3.h
/usr/include/openssl/x509v3err.h
/usr/include/x86_64-linux-gnu
/usr/include/x86_64-linux-gnu/openssl
/usr/include/x86_64-linux-gnu/openssl/configuration.h
/usr/include/x86_64-linux-gnu/openssl/opensslconf.h
/usr/lib
/usr/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu/libcrypto.a
/usr/lib/x86_64-linux-gnu/libssl.a
/usr/lib/x86_64-linux-gnu/pkgconfig
/usr/lib/x86_64-linux-gnu/pkgconfig/libcrypto.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/libssl.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/openssl.pc
/usr/share
/usr/share/doc
/usr/share/doc/libssl-dev
/usr/lib/x86_64-linux-gnu/libcrypto.so
/usr/lib/x86_64-linux-gnu/libssl.so
/usr/share/doc/libssl-dev/changelog.Debian.gz
/usr/share/doc/libssl-dev/changelog.gz
/usr/share/doc/libssl-dev/copyright
yshinde@ala-lpggp3:/ala-lpggp31/yshinde-> dpkg -L libssl-dev | rg openssl
/usr/include/openssl
/usr/include/openssl/aes.h
/usr/include/openssl/asn1.h
/usr/include/openssl/asn1_mac.h
/usr/include/openssl/asn1err.h
/usr/include/openssl/asn1t.h
/usr/include/openssl/async.h
/usr/include/openssl/asyncerr.h
/usr/include/openssl/bio.h
/usr/include/openssl/bioerr.h
/usr/include/openssl/blowfish.h
/usr/include/openssl/bn.h
/usr/include/openssl/bnerr.h
/usr/include/openssl/buffer.h
/usr/include/openssl/buffererr.h
/usr/include/openssl/camellia.h
/usr/include/openssl/cast.h
/usr/include/openssl/cmac.h
/usr/include/openssl/cmp.h
/usr/include/openssl/cmp_util.h
/usr/include/openssl/cmperr.h
/usr/include/openssl/cms.h
/usr/include/openssl/cmserr.h
/usr/include/openssl/comp.h
/usr/include/openssl/comperr.h
/usr/include/openssl/conf.h
/usr/include/openssl/conf_api.h
/usr/include/openssl/conferr.h
/usr/include/openssl/conftypes.h
/usr/include/openssl/core.h
/usr/include/openssl/core_dispatch.h
/usr/include/openssl/core_names.h
/usr/include/openssl/core_object.h
/usr/include/openssl/crmf.h
/usr/include/openssl/crmferr.h
/usr/include/openssl/crypto.h
/usr/include/openssl/cryptoerr.h
/usr/include/openssl/cryptoerr_legacy.h
/usr/include/openssl/ct.h
/usr/include/openssl/cterr.h
/usr/include/openssl/decoder.h
/usr/include/openssl/decodererr.h
/usr/include/openssl/des.h
/usr/include/openssl/dh.h
/usr/include/openssl/dherr.h
/usr/include/openssl/dsa.h
/usr/include/openssl/dsaerr.h
/usr/include/openssl/dtls1.h
/usr/include/openssl/e_os2.h
/usr/include/openssl/ebcdic.h
/usr/include/openssl/ec.h
/usr/include/openssl/ecdh.h
/usr/include/openssl/ecdsa.h
/usr/include/openssl/ecerr.h
/usr/include/openssl/encoder.h
/usr/include/openssl/encodererr.h
/usr/include/openssl/engine.h
/usr/include/openssl/engineerr.h
/usr/include/openssl/err.h
/usr/include/openssl/ess.h
/usr/include/openssl/esserr.h
/usr/include/openssl/evp.h
/usr/include/openssl/evperr.h
/usr/include/openssl/fips_names.h
/usr/include/openssl/fipskey.h
/usr/include/openssl/hmac.h
/usr/include/openssl/http.h
/usr/include/openssl/httperr.h
/usr/include/openssl/idea.h
/usr/include/openssl/kdf.h
/usr/include/openssl/kdferr.h
/usr/include/openssl/lhash.h
/usr/include/openssl/macros.h
/usr/include/openssl/md2.h
/usr/include/openssl/md4.h
/usr/include/openssl/md5.h
/usr/include/openssl/mdc2.h
/usr/include/openssl/modes.h
/usr/include/openssl/obj_mac.h
/usr/include/openssl/objects.h
/usr/include/openssl/objectserr.h
/usr/include/openssl/ocsp.h
/usr/include/openssl/ocsperr.h
/usr/include/openssl/opensslv.h
/usr/include/openssl/ossl_typ.h
/usr/include/openssl/param_build.h
/usr/include/openssl/params.h
/usr/include/openssl/pem.h
/usr/include/openssl/pem2.h
/usr/include/openssl/pemerr.h
/usr/include/openssl/pkcs12.h
/usr/include/openssl/pkcs12err.h
/usr/include/openssl/pkcs7.h
/usr/include/openssl/pkcs7err.h
/usr/include/openssl/prov_ssl.h
/usr/include/openssl/proverr.h
/usr/include/openssl/provider.h
/usr/include/openssl/rand.h
/usr/include/openssl/randerr.h
/usr/include/openssl/rc2.h
/usr/include/openssl/rc4.h
/usr/include/openssl/rc5.h
/usr/include/openssl/ripemd.h
/usr/include/openssl/rsa.h
/usr/include/openssl/rsaerr.h
/usr/include/openssl/safestack.h
/usr/include/openssl/seed.h
/usr/include/openssl/self_test.h
/usr/include/openssl/sha.h
/usr/include/openssl/srp.h
/usr/include/openssl/srtp.h
/usr/include/openssl/ssl.h
/usr/include/openssl/ssl2.h
/usr/include/openssl/ssl3.h
/usr/include/openssl/sslerr.h
/usr/include/openssl/sslerr_legacy.h
/usr/include/openssl/stack.h
/usr/include/openssl/store.h
/usr/include/openssl/storeerr.h
/usr/include/openssl/symhacks.h
/usr/include/openssl/tls1.h
/usr/include/openssl/trace.h
/usr/include/openssl/ts.h
/usr/include/openssl/tserr.h
/usr/include/openssl/txt_db.h
/usr/include/openssl/types.h
/usr/include/openssl/ui.h
/usr/include/openssl/uierr.h
/usr/include/openssl/whrlpool.h
/usr/include/openssl/x509.h
/usr/include/openssl/x509_vfy.h
/usr/include/openssl/x509err.h
/usr/include/openssl/x509v3.h
/usr/include/openssl/x509v3err.h
2

How did you install pkg-config?
What's the output of:
pkg-config --variable pc_path pkg-config

If you're cross-compiling and using a sysroot, the sysroot's pkg-config won't find your host's .pc files. You can try to pass a local PKG_CONFIG_PATH prior to the build and it might work if your host and target architectures are similar.
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/x86_64-linux-gnu/pkgconfig cargo build

3

I installed pkg-config via apt-get install pkg-config.
pkg-config output:

$ pkg-config --variable pc_path pkg-config

/usr/local/lib/x86_64-linux-gnu/pkgconfig:/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig

Yes, I am cross-compiling and using a sysroot. The same build didn't fail until rust v1.85.0. Also, there is no changes in the configurations of openssl or pkg-config in build framework or host packages. There are many instances of similar errors reported.

Also, tried to add following in Cargo.toml of open-ssl but it didn't work:

[dependencies]
openssl = { version = "0.10", features = ["vendored"] }

I am not sure what is the exact cause of failure and how to fix it.

4

It seems you have a pkg-config executable in your sysroot, and the one on your host is no longer used when cross-compiling.
I would say that this is the correct behavior and it previously worked maybe by chance, but I’m not sure.

Did you try modifying the PKG_CONFIG_PATH as previously described. Otherwise you might need to install OpenSSL (and/or pkg-config) in your sysroot.

I’m not sure why the vendored feature isn’t working since it’s supposed to build openssl with your sysroot’s C compiler; it might be worth posting the relevant output of cargo build -vv

6

I am not sure how to do that when using a sysroot.
Can you please guide me?

7

I have no experience with poky unfortunately.
How do you run your build?
I would probably start with

export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/x86_64-linux-gnu/pkgconfig

Then run your build command.

If that didn’t work, I would probably check for the existence of a pkg-config binary in

/home/poky/build/tmp/work/x86_64-linux/rust-native/1.86.0/recipe-sysroot-native/usr/bin/pkg-config

Normally sysroots come with pkg-config preinstalled. If not I might try just copying pkg-config to the sysroot’s /usr/bin.
Otherwise if this also fails, find a way to install openssl in the sysroot (I assume it has gcc installed). If I remember correctly, openssl required perl as a build dependency.