nikita@ubuntu:~/bmcweb$ ninja -C builddir

ninja: Entering directory `builddir'

[1/24] Compiling C++ object 'subprojects/tinyxml2-7.0.1/ce97265@@xmltest@exe/xmltest.cpp.o'.

FAILED: subprojects/tinyxml2-7.0.1/ce97265@@xmltest@exe/xmltest.cpp.o 

c++ -Isubprojects/tinyxml2-7.0.1/ce97265@@xmltest@exe -Isubprojects/tinyxml2-7.0.1 -I../subprojects/tinyxml2-7.0.1 -flto -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wnon-virtual-dtor -Wextra -Wpedantic -Werror -std=c++17 -fno-rtti -O2 -g -MD -MQ 'subprojects/tinyxml2-7.0.1/ce97265@@xmltest@exe/xmltest.cpp.o' -MF 'subprojects/tinyxml2-7.0.1/ce97265@@xmltest@exe/xmltest.cpp.o.d' -o 'subprojects/tinyxml2-7.0.1/ce97265@@xmltest@exe/xmltest.cpp.o' -c ../subprojects/tinyxml2-7.0.1/xmltest.cpp

../subprojects/tinyxml2-7.0.1/xmltest.cpp: In function ‘int main(int, const char**)’:

../subprojects/tinyxml2-7.0.1/xmltest.cpp:707:10: error: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Werror=unused-result]

  707 |     fgets( savedBuf, 256, saved );

      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

../subprojects/tinyxml2-7.0.1/xmltest.cpp:1067:9: error: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Werror=unused-result]

 1067 |    fgets( buf, 1024, textfile );

      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

cc1plus: all warnings being treated as errors

[2/24] Compiling C++ object 'subprojects/tinyxml2-7.0.1/ce97265@@tinyxml2@sha/tinyxml2.cpp.o'.^C

ninja: build stopped: interrupted by user.

 

 

 

 

I have this problem them i print command : ninja -C builddir

How to fix this ?