Linker error on linux(ubuntu ) environment - undefined reference to `pg_encoding_to_char'

[vikirj]

Hi,

I have installed libpqxx from vcpkg.

My sample code.

#include <iostream>
#include <pqxx/pqxx>

int main(int argc, char* argv[])
{
	pqxx::connection c;
	std::cout << "Connected to " << c.dbname() << '\n';

	pqxx::work tx{c};
}

I built the sample code using cmake.

My CMakeLists.txt is:

cmake_minimum_required(VERSION 3.9)

project(test)     #project name
add_executable(${PROJECT_NAME}  sample.cpp )

target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_20)

target_include_directories(${PROJECT_NAME}  BEFORE PUBLIC  ${include} )

target_link_libraries(${PROJECT_NAME} PUBLIC
${lib}/libpqxx.a
${lib}/libpq.a
${lib}/libxml2.a
${lib}/liblzma.a
${lib}/libuuid.a
${lib}/libz.a 
${lib}/libcrypto.a 
-lpthread -ldl -lrt )

I encountered an error while executing the CMake command.

/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpqxx.a(encodings.cxx.o): in function `pqxx::internal::name_encoding(int)':
encodings.cxx:(.text+0x5): undefined reference to `pg_encoding_to_char'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `emitHostIdentityInfo':
fe-connect.c:(.text+0xcd4): undefined reference to `pg_getnameinfo_all'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQconnectPoll':
fe-connect.c:(.text+0x19cd): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-connect.c:(.text+0x1a00): undefined reference to `pg_getaddrinfo_all'
/usr/bin/ld: fe-connect.c:(.text+0x1ad0): undefined reference to `pg_freeaddrinfo_all'
/usr/bin/ld: fe-connect.c:(.text+0x1e20): undefined reference to `pg_freeaddrinfo_all'
/usr/bin/ld: fe-connect.c:(.text+0x1e51): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-connect.c:(.text+0x1e77): undefined reference to `pg_getaddrinfo_all'
/usr/bin/ld: fe-connect.c:(.text+0x1eca): undefined reference to `pg_getaddrinfo_all'
/usr/bin/ld: fe-connect.c:(.text+0x23e8): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x24f9): undefined reference to `pg_prng_uint64_range'
/usr/bin/ld: fe-connect.c:(.text+0x2ac6): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x2c2f): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x2c95): undefined reference to `pg_inet_net_ntop'
/usr/bin/ld: fe-connect.c:(.text+0x2cfd): undefined reference to `pg_inet_net_ntop'
/usr/bin/ld: fe-connect.c:(.text+0x2e15): undefined reference to `getpeereid'
/usr/bin/ld: fe-connect.c:(.text+0x2e3b): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x2ea0): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x3075): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x30f8): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-connect.c:(.text+0x3231): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o):fe-connect.c:(.text+0x3371): more undefined references to `pg_strerror_r' follow
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQresetStart':
fe-connect.c:(.text+0x3831): undefined reference to `pg_link_canary_is_frontend'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQreset':
fe-connect.c:(.text+0x3931): undefined reference to `pg_link_canary_is_frontend'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQsetClientEncoding':
fe-connect.c:(.text+0x40b6): undefined reference to `pg_sprintf'
/usr/bin/ld: fe-connect.c:(.text+0x4108): undefined reference to `pg_get_encoding_from_locale'
/usr/bin/ld: fe-connect.c:(.text+0x410f): undefined reference to `pg_encoding_to_char'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `parseServiceInfo':
fe-connect.c:(.text+0x4352): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-connect.c:(.text+0x4421): undefined reference to `pg_snprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `connectOptions2':
fe-connect.c:(.text+0x5cf1): undefined reference to `pg_strip_crlf'
/usr/bin/ld: fe-connect.c:(.text+0x6083): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x609a): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x60b1): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x60c8): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x6283): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x6467): undefined reference to `pg_strong_random'
/usr/bin/ld: fe-connect.c:(.text+0x6473): undefined reference to `pg_prng_seed_check'
/usr/bin/ld: fe-connect.c:(.text+0x64a6): undefined reference to `pg_prng_seed'
/usr/bin/ld: fe-connect.c:(.text+0x64c6): undefined reference to `pg_prng_uint64_range'
/usr/bin/ld: fe-connect.c:(.text+0x69a6): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-connect.c:(.text+0x6a1c): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-connect.c:(.text+0x6a3c): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-connect.c:(.text+0x6aab): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x6ac2): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x6ad9): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x6b5f): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-connect.c:(.text+0x6b72): undefined reference to `pg_strcasecmp'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o):fe-connect.c:(.text+0x6b81): more undefined references to `pg_strcasecmp' follow
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `connectOptions2':
fe-connect.c:(.text+0x6c7d): undefined reference to `pg_get_encoding_from_locale'
/usr/bin/ld: fe-connect.c:(.text+0x6c84): undefined reference to `pg_encoding_to_char'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQconnectStartParams':
fe-connect.c:(.text+0x712c): undefined reference to `pg_link_canary_is_frontend'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQconnectStart':
fe-connect.c:(.text+0x7459): undefined reference to `pg_link_canary_is_frontend'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `PQsetdbLogin':
fe-connect.c:(.text+0x7771): undefined reference to `pg_link_canary_is_frontend'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `defaultNoticeProcessor':
fe-connect.c:(.text+0x11b): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-connect.o): in function `pqGetHomeDirectory':
fe-connect.c:(.text+0x4244): undefined reference to `pg_get_user_home_dir'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-exec.o): in function `PQescapeStringInternal':
fe-exec.c:(.text+0x281): undefined reference to `pg_encoding_mblen'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-exec.o): in function `PQescapeInternal':
fe-exec.c:(.text+0x523): undefined reference to `pg_encoding_mblen'
/usr/bin/ld: fe-exec.c:(.text+0x5c9): undefined reference to `pg_encoding_mblen'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-exec.o): in function `pqInternalNotice':
fe-exec.c:(.text+0x1944): undefined reference to `pg_vsnprintf'
/usr/bin/ld: fe-exec.c:(.text+0x19e6): undefined reference to `pg_sprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-exec.o): in function `pqSaveParameterStatus':
fe-exec.c:(.text+0x20ad): undefined reference to `pg_char_to_encoding'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-exec.o): in function `PQfnumber':
fe-exec.c:(.text+0x473f): undefined reference to `pg_tolower'
/usr/bin/ld: fe-exec.c:(.text+0x4821): undefined reference to `pg_tolower'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-misc.o): in function `PQmblenBounded':
fe-misc.c:(.text+0x77e): undefined reference to `pg_encoding_mblen'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-misc.o): in function `PQenv2encoding':
fe-misc.c:(.text+0x7e1): undefined reference to `pg_char_to_encoding'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-misc.o): in function `pqSocketCheck.part.0':
fe-misc.c:(.text+0xadf): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-misc.o): in function `PQmblen':
fe-misc.c:(.text+0x75d): undefined reference to `pg_encoding_mblen'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-misc.o): in function `PQdsplen':
fe-misc.c:(.text+0x79d): undefined reference to `pg_encoding_dsplen'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-protocol3.o): in function `build_startup_packet':
fe-protocol3.c:(.text+0x4fc): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-protocol3.c:(.text+0x5bc): undefined reference to `pg_strcasecmp'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-protocol3.o): in function `pqBuildErrorMessage3':
fe-protocol3.c:(.text+0xa5b): undefined reference to `pg_encoding_max_length'
/usr/bin/ld: fe-protocol3.c:(.text+0xdab): undefined reference to `pg_encoding_dsplen'
/usr/bin/ld: fe-protocol3.c:(.text+0xf2d): undefined reference to `pg_encoding_dsplen'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure.o): in function `pqsecure_raw_read':
fe-secure.c:(.text+0x142): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure.o): in function `pqsecure_raw_write.part.0':
fe-secure.c:(.text+0x4a3): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure.c:(.text+0x57c): undefined reference to `pg_strerror_r'
/usr/bin/ld: fe-secure.c:(.text+0x595): undefined reference to `pg_snprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o): in function `pqTraceOutputNchar':
fe-trace.c:(.text+0x2e): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0x8d): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0xc9): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o): in function `pqTraceOutputNR.constprop.0':
fe-trace.c:(.text+0x11e): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0x149): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o):fe-trace.c:(.text+0x16f): more undefined references to `pg_fprintf' follow
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o): in function `pqTraceOutputMessage':
fe-trace.c:(.text+0x483): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-trace.c:(.text+0x49b): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0x4c1): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0x53d): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0x555): undefined reference to `pg_fprintf'
/usr/bin/ld: fe-trace.c:(.text+0x580): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o):fe-trace.c:(.text+0x59d): more undefined references to `pg_fprintf' follow
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o): in function `pqTraceOutputNoTypeByteMessage':
fe-trace.c:(.text+0x17ff): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-trace.c:(.text+0x1817): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-trace.o): in function `pqTraceOutputMessage':
fe-trace.c:(.text+0x528): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(pqexpbuffer.o): in function `appendPQExpBufferVA':
pqexpbuffer.c:(.text+0x211): undefined reference to `pg_vsnprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth.o): in function `pg_fe_sendauth':
fe-auth.c:(.text+0x816): undefined reference to `pg_md5_encrypt'
/usr/bin/ld: fe-auth.c:(.text+0x835): undefined reference to `pg_md5_encrypt'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth.o): in function `pg_fe_getusername':
fe-auth.c:(.text+0xa4c): undefined reference to `pg_get_user_name'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth.o): in function `PQencryptPassword':
fe-auth.c:(.text+0xb49): undefined reference to `pg_md5_encrypt'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth.o): in function `PQencryptPasswordConn':
fe-auth.c:(.text+0xc40): undefined reference to `pg_md5_encrypt'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `SSLerrmessage':
fe-secure-openssl.c:(.text+0xad): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0xd2): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0xf1): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `initialize_SSL':
fe-secure-openssl.c:(.text+0x609): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0x66b): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-secure-openssl.c:(.text+0x682): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-secure-openssl.c:(.text+0x699): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-secure-openssl.c:(.text+0x6b0): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-secure-openssl.c:(.text+0x98b): undefined reference to `pg_strcasecmp'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o):fe-secure-openssl.c:(.text+0x9a2): more undefined references to `pg_strcasecmp' follow
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `initialize_SSL':
fe-secure-openssl.c:(.text+0xa49): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0xca6): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0xd09): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0xea4): undefined reference to `pg_snprintf'
/usr/bin/ld: fe-secure-openssl.c:(.text+0x10ad): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `pgtls_read':
fe-secure-openssl.c:(.text+0x127c): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `pgtls_write':
fe-secure-openssl.c:(.text+0x152a): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `pgtls_open_client':
fe-secure-openssl.c:(.text+0x1eee): undefined reference to `pg_strerror_r'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `PQsslAttribute':
fe-secure-openssl.c:(.text+0x214a): undefined reference to `pg_snprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-openssl.o): in function `PQdefaultSSLKeyPassHook_OpenSSL':
fe-secure-openssl.c:(.text+0x2244): undefined reference to `pg_fprintf'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth-scram.o): in function `scram_init':
fe-auth-scram.c:(.text+0xdc): undefined reference to `pg_saslprep'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth-scram.o): in function `scram_exchange':
fe-auth-scram.c:(.text+0x22a): undefined reference to `pg_strong_random'
/usr/bin/ld: fe-auth-scram.c:(.text+0x23c): undefined reference to `pg_b64_enc_len'
/usr/bin/ld: fe-auth-scram.c:(.text+0x26a): undefined reference to `pg_b64_encode'
/usr/bin/ld: fe-auth-scram.c:(.text+0x507): undefined reference to `pg_b64_dec_len'
/usr/bin/ld: fe-auth-scram.c:(.text+0x540): undefined reference to `pg_b64_decode'
/usr/bin/ld: fe-auth-scram.c:(.text+0x669): undefined reference to `pg_hmac_create'
/usr/bin/ld: fe-auth-scram.c:(.text+0x6a6): undefined reference to `scram_SaltedPassword'
/usr/bin/ld: fe-auth-scram.c:(.text+0x6d8): undefined reference to `scram_ClientKey'
/usr/bin/ld: fe-auth-scram.c:(.text+0x702): undefined reference to `scram_H'
/usr/bin/ld: fe-auth-scram.c:(.text+0x71b): undefined reference to `pg_hmac_init'
/usr/bin/ld: fe-auth-scram.c:(.text+0x744): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0x760): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0x789): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0x7a5): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0x7c7): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0x7e3): undefined reference to `pg_hmac_final'
/usr/bin/ld: fe-auth-scram.c:(.text+0x95d): undefined reference to `pg_hmac_free'
/usr/bin/ld: fe-auth-scram.c:(.text+0x974): undefined reference to `pg_b64_enc_len'
/usr/bin/ld: fe-auth-scram.c:(.text+0x9a3): undefined reference to `pg_b64_encode'
/usr/bin/ld: fe-auth-scram.c:(.text+0xaa1): undefined reference to `pg_b64_dec_len'
/usr/bin/ld: fe-auth-scram.c:(.text+0xad2): undefined reference to `pg_b64_decode'
/usr/bin/ld: fe-auth-scram.c:(.text+0xb71): undefined reference to `pg_hmac_create'
/usr/bin/ld: fe-auth-scram.c:(.text+0xb9c): undefined reference to `scram_ServerKey'
/usr/bin/ld: fe-auth-scram.c:(.text+0xbb3): undefined reference to `pg_hmac_init'
/usr/bin/ld: fe-auth-scram.c:(.text+0xbd5): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0xbf4): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0xc1d): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0xc35): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0xc57): undefined reference to `pg_hmac_update'
/usr/bin/ld: fe-auth-scram.c:(.text+0xc72): undefined reference to `pg_hmac_final'
/usr/bin/ld: fe-auth-scram.c:(.text+0xc7e): undefined reference to `pg_hmac_free'
/usr/bin/ld: fe-auth-scram.c:(.text+0xcc4): undefined reference to `pg_hmac_error'
/usr/bin/ld: fe-auth-scram.c:(.text+0xcd1): undefined reference to `pg_hmac_free'
/usr/bin/ld: fe-auth-scram.c:(.text+0xe18): undefined reference to `pg_hmac_error'
/usr/bin/ld: fe-auth-scram.c:(.text+0xe25): undefined reference to `pg_hmac_free'
/usr/bin/ld: fe-auth-scram.c:(.text+0xf22): undefined reference to `pg_b64_enc_len'
/usr/bin/ld: fe-auth-scram.c:(.text+0xf57): undefined reference to `pg_b64_encode'
/usr/bin/ld: fe-auth-scram.c:(.text+0x1043): undefined reference to `pg_hmac_error'
/usr/bin/ld: fe-auth-scram.c:(.text+0x10cd): undefined reference to `pg_hmac_error'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-auth-scram.o): in function `pg_fe_scram_build_secret':
fe-auth-scram.c:(.text+0x120d): undefined reference to `pg_saslprep'
/usr/bin/ld: fe-auth-scram.c:(.text+0x122c): undefined reference to `pg_strong_random'
/usr/bin/ld: fe-auth-scram.c:(.text+0x1252): undefined reference to `scram_build_secret'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-common.o): in function `pq_verify_peer_name_matches_certificate_name':
fe-secure-common.c:(.text+0xd7): undefined reference to `pg_strcasecmp'
/usr/bin/ld: fe-secure-common.c:(.text+0x13d): undefined reference to `pg_strcasecmp'
/usr/bin/ld: /home/vcpkg/installed/x64-linux/lib/libpq.a(fe-secure-common.o): in function `pq_verify_peer_name_matches_certificate_ip':
fe-secure-common.c:(.text+0x242): undefined reference to `pg_inet_net_ntop'
/usr/bin/ld: fe-secure-common.c:(.text+0x32a): undefined reference to `pg_strerror_r'
collect2: error: ld returned 1 exit status
make[2]: *** [src/test/CMakeFiles/test.dir/build.make:109: bin/test] Error 1
make[1]: *** [CMakeFiles/Makefile2:1940: src/test/CMakeFiles/test.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

How to resolve the above error.

[jtv]

I wonder what that could be... The errors seem to have nothing to do with libpqxx at all, they're link errors about libpq functions not finding other libpq functions!

[tt4g]

It seems to be a problem with CMakeLists.txt as it is not made as per the vcpkg and CMake integration tutorial.

See:

• https://learn.microsoft.com/en-us/vcpkg/users/buildsystems/cmake-integration
• https://learn.microsoft.com/en-us/vcpkg/get_started/get-started