Using crossbuild to build static external libraries

[calvn]

Is it possible to use crossbuild to build external static libraries for different platforms? More specifically, I would like to build libgit2 and its dependencies statically (openssl and libssh2). I have been encountering one error after another, but it is most likely because I am not familiar enough in the subject matter.

Side note: Both libgit2 and libssh2 uses CMake for the build/install, which in turn depends heavily on pkg-config. I realized that when passing in CROSS_TRIPLE=x86_64-apple-darwin, pkg-config is installed, but otherwise it is not present on the image.

[moul]

Hi @cleung2010

Is it possible to use crossbuild to build external static libraries for different platforms?

yes it is possible, however in some cases, it may be harder than just running the image with the correct env, can you give me some more detail about your issues ?

in CROSS_TRIPLE=x86_64-apple-darwin, pkg-config is installed, but otherwise it is not present on the image

Probably related with #21

[calvn]

An example would be to build libgit2, openssl, and libssh2 for different operating systems using crossbuild as the base image.

I am trying to get it to work in here, and got linux-amd64 in a functional state. However, I am not sure how to make the darwin-x64 or win-x64 versions build properly.

[moul]

@cleung2010 there is now an /usr/osxcross/bin/osxcross-macports binary in the image, I hope it may help you to install your dependencies for osx targets

[clns]

Has anyone managed to build libgit2 (including libssh2 and openssl) on macos with this docker image?

[clns]

I tried the following commands but I get an error on make:

# ./Configure darwin64-x86_64-cc
Configuring OpenSSL version 1.1.1-pre3-dev (0x10101003L) for darwin64-x86_64-cc
Using os-specific seed configuration
Creating configdata.pm
Creating Makefile

**********************************************************************
***                                                                ***
***   If you want to report a building issue, please include the   ***
***   output from this command:                                    ***
***                                                                ***
***     perl configdata.pm --dump                                  ***
***                                                                ***
**********************************************************************
# make depend
# make
/usr/bin/perl "-I." -Mconfigdata "util/dofile.pl" \
    "-oMakefile" crypto/include/internal/bn_conf.h.in > crypto/include/internal/bn_conf.h
/usr/bin/perl "-I." -Mconfigdata "util/dofile.pl" \
    "-oMakefile" crypto/include/internal/dso_conf.h.in > crypto/include/internal/dso_conf.h
/usr/bin/perl "-I." -Mconfigdata "util/dofile.pl" \
    "-oMakefile" include/openssl/opensslconf.h.in > include/openssl/opensslconf.h
make depend && make _all
make[1]: Entering directory '/go/src/github.com/openssl/openssl'
make[1]: Leaving directory '/go/src/github.com/openssl/openssl'
make[1]: Entering directory '/go/src/github.com/openssl/openssl'
cc  -I. -Iinclude -O3 -arch x86_64 -Wall -fPIC -DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSL_CPUID_OBJ -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DRC4_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -DX25519_ASM -DPADLOCK_ASM -DPOLY1305_ASM -D_REENTRANT -DL_ENDIAN -DOPENSSLDIR="\"/usr/local/ssl\"" -DENGINESDIR="\"/usr/local/lib/engines-1.1\"" -c -MMD -MF apps/app_rand.d.tmp -MT apps/app_rand.o -c -o apps/app_rand.o apps/app_rand.c
cc: error: x86_64: No such file or directory
cc: error: unrecognized command line option '-arch'
Makefile:696: recipe for target 'apps/app_rand.o' failed
make[1]: *** [apps/app_rand.o] Error 1
make[1]: Leaving directory '/go/src/github.com/openssl/openssl'
Makefile:146: recipe for target 'all' failed
make: *** [all] Error 2

[clns]

After setting export CC="crossbuild cc", make goes further, but it stops with this output error:

# make
...
rm -f apps/openssl
${LDCMD:-crossbuild cc} -O3 -arch x86_64 -Wall -Qunused-arguments -fPIC -L.  \
        -o apps/openssl apps/asn1pars.o apps/ca.o apps/ciphers.o apps/cms.o apps/crl.o apps/crl2p7.o apps/dgst.o apps/dhparam.o apps/dsa.o apps/dsaparam.o apps/ec.o apps/ecparam.o apps/enc.o apps/engine.o apps/errstr.o apps/gendsa.o apps/genpkey.o apps/genrsa.o apps/nseq.o apps/ocsp.o apps/openssl.o apps/passwd.o apps/pkcs12.o apps/pkcs7.o apps/pkcs8.o apps/pkey.o apps/pkeyparam.o apps/pkeyutl.o apps/prime.o apps/rand.o apps/rehash.o apps/req.o apps/rsa.o apps/rsautl.o apps/s_client.o apps/s_server.o apps/s_time.o apps/sess_id.o apps/smime.o apps/speed.o apps/spkac.o apps/srp.o apps/storeutl.o apps/ts.o apps/verify.o apps/version.o apps/x509.o \
        -Wl,-search_paths_first  apps/libapps.a -lssl -lcrypto
ld: archive has no table of contents file 'apps/libapps.a' for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Makefile:6470: recipe for target 'apps/openssl' failed
make[1]: *** [apps/openssl] Error 1
make[1]: Leaving directory '/go/src/github.com/openssl/openssl'
Makefile:146: recipe for target 'all' failed
make: *** [all] Error 2

I tried setting export AR=/usr/x86_64-apple-darwin14/bin/ar but it's the same result.