Compile failed on CentOS7 machine

[atari83]

I built the cpprestsdk on FreeBSD 12.1 (Clang 8, Boost 1.72) with no issue, However when i tried to build it on my CentOS machine (GCC 10 / Boost 1.74) the compilation failed with this error:

[4/160] Building CXX object Release/src/CMakeFiles/cpprest.dir/http/common/http_helpers.cpp.o
FAILED: Release/src/CMakeFiles/cpprest.dir/http/common/http_helpers.cpp.o 
/usr/local/bin/g++  -DBOOST_ALL_NO_LIB -DBOOST_ATOMIC_DYN_LINK -DBOOST_CHRONO_DYN_LINK -DBOOST_DATE_TIME_DYN_LINK -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_RANDOM_DYN_LINK -DBOOST_REGEX_DYN_LINK -DBOOST_SYSTEM_DYN_LINK -DBOOST_THREAD_DYN_LINK -DCPPREST_EXCLUDE_BROTLI=1 -DCPPREST_FORCE_HTTP_CLIENT_ASIO -DCPPREST_FORCE_HTTP_LISTENER_ASIO -Dcpprest_EXPORTS -I../Release/include -I../Release/src/pch -I../Release/libs/websocketpp -std=c++11 -fno-strict-aliasing -O2 -DNDEBUG -fPIC   -Werror -pedantic -Wall -Wextra -Wunused-parameter -Wcast-align -Wcast-qual -Wconversion -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-format-attribute -Wmissing-include-dirs -Wpacked -Wredundant-decls -Wunreachable-code -MD -MT Release/src/CMakeFiles/cpprest.dir/http/common/http_helpers.cpp.o -MF Release/src/CMakeFiles/cpprest.dir/http/common/http_helpers.cpp.o.d -o Release/src/CMakeFiles/cpprest.dir/http/common/http_helpers.cpp.o -c ../Release/src/http/common/http_helpers.cpp
../Release/src/http/common/http_helpers.cpp: In function ‘size_t web::http::details::chunked_encoding::add_chunked_delimiters(uint8_t*, size_t, size_t)’:
../Release/src/http/common/http_helpers.cpp:91:43: error: ‘%8zX’ directive output may be truncated writing between 8 and 16 bytes into a region of size 9 [-Werror=format-truncation=]
   91 |         snprintf(buffer, sizeof(buffer), "%8zX", bytes_read);
      |                                           ^~~~
../Release/src/http/common/http_helpers.cpp:91:42: note: directive argument in the range [1, 18446744073709551615]
   91 |         snprintf(buffer, sizeof(buffer), "%8zX", bytes_read);
      |                                          ^~~~~~
../Release/src/http/common/http_helpers.cpp:91:17: note: ‘snprintf’ output between 9 and 17 bytes into a destination of size 9
   91 |         snprintf(buffer, sizeof(buffer), "%8zX", bytes_read);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors

Is there anything wrong with my setup on Linux machine ? and how can i resolve it ?

Thanks,

[atari83]

I used proposed patch: https://github.com/microsoft/cpprestsdk/pull/1462/files
and http_helpers.cpp compiled with no issue.

[barcharcraz]

is this just because bytes_read is a long int or something?