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https://issues.apache.org/jira/browse/MINIFICPP-1301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marton Szasz closed MINIFICPP-1301.
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> Cannot compile with GCC 10
> --------------------------
>
> Key: MINIFICPP-1301
> URL: https://issues.apache.org/jira/browse/MINIFICPP-1301
> Project: Apache NiFi MiNiFi C++
> Issue Type: Bug
> Reporter: Marton Szasz
> Assignee: Marton Szasz
> Priority: Major
>
> Compilation with GCC 10 fails, most likely due to the switch from
> {{-fcommon}} to {{-fno-common}} behavior.
> see: [https://wiki.gentoo.org/wiki/Gcc_10_porting_notes/fno_common] and
> [https://gcc.gnu.org/gcc-10/porting_to.html]
> Error:
> {{[ 52%] Linking CXX executable minifi}}
>
> {{/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/bin/ld:
> ../libminifi/libcore-minifi.a(SSLContextService.cpp.o): in function
> `sk_X509_num':}}
> {{/usr/include/openssl/x509.h:99: undefined reference to `OPENSSL_sk_num'}}
>
> {{/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/bin/ld:
> ../libminifi/libcore-minifi.a(SSLContextService.cpp.o): in function
> `sk_X509_pop':}}
> {{/usr/include/openssl/x509.h:99: undefined reference to `OPENSSL_sk_pop'}}
>
> {{/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/bin/ld:
> ../libminifi/libcore-minifi.a(SSLContextService.cpp.o): in function
> `sk_X509_pop_free':}}
> {{/usr/include/openssl/x509.h:99: undefined reference to
> `OPENSSL_sk_pop_free'}}
> {{collect2: error: ld returned 1 exit status}}
> {{gmake[2]: *** [main/CMakeFiles/minifiexe.dir/build.make:178: main/minifi]
> Error 1}}
> {{gmake[1]: *** [CMakeFiles/Makefile2:3567:
> main/CMakeFiles/minifiexe.dir/all] Error 2}}
> {{gmake: *** [Makefile:183: all] Error 2}}
>
> Workaround: Add {{-fcommon}} to your CFLAGS and CXXFLAGS
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