Determining if the __x86_64__ exist failed with the following output: Change Dir: /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_e02e7/fast && gmake[1]: Entering directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' /usr/bin/gmake -f CMakeFiles/cmTC_e02e7.dir/build.make CMakeFiles/cmTC_e02e7.dir/build gmake[2]: Entering directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_e02e7.dir/CheckSymbolExists.c.o /home/giuliobenetti/autobuild/run/instance-1/output-1/host/bin/arm-linux-gcc --sysroot=/home/giuliobenetti/autobuild/run/instance-1/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot -D_POSIX_C_SOURCE=200112L -fPIC -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -static -Werror -DUSE_PROV_MODULE_FULL -Werror -DNDEBUG -fPIE -o CMakeFiles/cmTC_e02e7.dir/CheckSymbolExists.c.o -c /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main': /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: error: '__x86_64__' undeclared (first use in this function) 7 | return ((int*)(&__x86_64__))[argc]; | ^~~~~~~~~~ /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: note: each undeclared identifier is reported only once for each function it appears in gmake[2]: *** [CMakeFiles/cmTC_e02e7.dir/build.make:78: CMakeFiles/cmTC_e02e7.dir/CheckSymbolExists.c.o] Error 1 gmake[2]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' gmake[1]: *** [Makefile:127: cmTC_e02e7/fast] Error 2 gmake[1]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' File /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: /* */ int main(int argc, char** argv) { (void)argv; #ifndef __x86_64__ return ((int*)(&__x86_64__))[argc]; #else (void)argc; return 0; #endif } Determining if the __i386__ exist failed with the following output: Change Dir: /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_7ae09/fast && gmake[1]: Entering directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' /usr/bin/gmake -f CMakeFiles/cmTC_7ae09.dir/build.make CMakeFiles/cmTC_7ae09.dir/build gmake[2]: Entering directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' Building C object CMakeFiles/cmTC_7ae09.dir/CheckSymbolExists.c.o /home/giuliobenetti/autobuild/run/instance-1/output-1/host/bin/arm-linux-gcc --sysroot=/home/giuliobenetti/autobuild/run/instance-1/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot -D_POSIX_C_SOURCE=200112L -fPIC -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -static -Werror -DUSE_PROV_MODULE_FULL -Werror -DNDEBUG -fPIE -o CMakeFiles/cmTC_7ae09.dir/CheckSymbolExists.c.o -c /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main': /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: error: '__i386__' undeclared (first use in this function) 7 | return ((int*)(&__i386__))[argc]; | ^~~~~~~~ /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c:7:19: note: each undeclared identifier is reported only once for each function it appears in gmake[2]: *** [CMakeFiles/cmTC_7ae09.dir/build.make:78: CMakeFiles/cmTC_7ae09.dir/CheckSymbolExists.c.o] Error 1 gmake[2]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' gmake[1]: *** [Makefile:127: cmTC_7ae09/fast] Error 2 gmake[1]: Leaving directory '/home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp' File /home/giuliobenetti/autobuild/run/instance-1/output-1/build/azure-iot-sdk-c-LTS_07_2022_Ref01/CMakeFiles/CMakeTmp/CheckSymbolExists.c: /* */ int main(int argc, char** argv) { (void)argv; #ifndef __i386__ return ((int*)(&__i386__))[argc]; #else (void)argc; return 0; #endif }