Building mapserver 7.0 checker on openSUSE complain mapserver 64bit-portability-issue in mapthread.c

[tigerfoot]

E: mapserver 64bit-portability-issue /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapthread.c:191

I've no idea how to fix it.
Mapserver is configured with the following option.

%cmake \
  -DCMAKE_INSTALL_PREFIX=%{_prefix} \
    -DCMAKE_SKIP_RPATH=ON \
    -DCMAKE_C_FLAGS_RELEASE="%{optflags} -fno-strict-aliasing" \
    -DCMAKE_CXX_FLAGS_RELEASE="%{optflags} -fno-strict-aliasing" \
    -DCMAKE_VERBOSE_MAKEFILE=ON \
    -DCMAKE_BUILD_TYPE="Release" \
    -DCMAKE_SKIP_INSTALL_RPATH=ON \
    -DCMAKE_SKIP_RPATH=ON \
    -DWITH_CAIRO=TRUE \
    -DWITH_CLIENT_WFS=TRUE \
    -DWITH_CLIENT_WMS=TRUE \
    -DWITH_CURL=TRUE \
    -DWITH_FCGI=TRUE \
  -DWITH_FRIBIDI=FALSE \
  -DWITH_HARFBUZZ=FALSE \
    -DWITH_GDAL=TRUE \
    -DWITH_GEOS=TRUE \
    -DWITH_GIF=FALSE \
    -DWITH_ICONV=TRUE \
    -DWITH_JAVA=TRUE \
    -DWITH_KML=TRUE \
    -DWITH_LIBXML2=TRUE \
    -DWITH_OGR=TRUE \
    -DWITH_MYSQL=TRUE \
    -DWITH_PERL=TRUE \
    -DCUSTOM_PERL_SITE_ARCH_DIR="%{perl_vendorarch}" \
    -DWITH_PHP=TRUE \
    -DWITH_POSTGIS=TRUE \
    -DWITH_PROJ=TRUE \
    -DWITH_PYTHON=TRUE \
    -DWITH_RUBY=TRUE \
    -DWITH_SOS=TRUE \
    -DWITH_THREAD_SAFETY=TRUE \
    -DWITH_WCS=TRUE \
    -DWITH_WMS=TRUE \
    -DWITH_WFS=TRUE \
    -DWITH_XMLMAPFILE=TRUE \
    -DWITH_POINT_Z_M=TRUE \
    -DWITH_APACHE_MODULE=FALSE \
    -DWITH_SVGCAIRO=FALSE \
    -DWITH_CSHARP=FALSE \
    -DWITH_ORACLESPATIAL=FALSE \
    -DWITH_ORACLE_PLUGIN=FALSE \
    -DWITH_MSSQL2008=FALSE \
    -DWITH_EXEMPI=FALSE \
    \..

I guess the interesting part during the compilation are the following lines

[   60s] /usr/bin/cmake -E cmake_progress_report /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/build/CMakeFiles 
[   60s] [ 24%] Building C object CMakeFiles/mapserver.dir/mapthread.c.o
[   60s] /usr/bin/gcc  -Dmapserver_EXPORTS -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -fno-strict-aliasing -fPIE -pie  -Wall -Wdeclaration-after-statement -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -fno-strict-aliasing -fPIC -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0/build -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0/renderers/agg/include -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapscript/v8 -I/usr/include/freetype2 -I/usr/include/cairo -I/usr/include/mysql -I/usr/include/fastcgi -I/usr/include/pgsql -I/usr/include/gdal -I/usr/include/libxml2 -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0    -o CMakeFiles/mapserver.dir/mapthread.c.o -c /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapthread.c
[   60s] /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/maptemplate.c: In function 'generateLegendTemplate':
[   60s] /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/maptemplate.c:3053:8: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result]
[   60s]    fread(file, length, 1, stream);
[   60s]         ^
[   60s] /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/maptemplate.c: In function 'processOneToManyJoin':
[   60s] /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/maptemplate.c:3539:10: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result]
[   60s]      fgets(line, MS_BUFFER_LENGTH, stream); /* skip the first line since it's the magic string */
[   60s]           ^
[   60s] /usr/bin/cmake -E cmake_progress_report /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/build/CMakeFiles 29
[   60s] [ 25%] Building C object CMakeFiles/mapserver.dir/mapcopy.c.o
[   60s] /usr/bin/gcc  -Dmapserver_EXPORTS -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -fno-strict-aliasing -fPIE -pie  -Wall -Wdeclaration-after-statement -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -fno-strict-aliasing -fPIC -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0/build -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0/renderers/agg/include -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapscript/v8 -I/usr/include/freetype2 -I/usr/include/cairo -I/usr/include/mysql -I/usr/include/fastcgi -I/usr/include/pgsql -I/usr/include/gdal -I/usr/include/libxml2 -I/home/abuild/rpmbuild/BUILD/mapserver-7.0.0    -o CMakeFiles/mapserver.dir/mapcopy.c.o -c /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapcopy.c
[   60s] /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapthread.c: In function 'msGetThreadId':
[   60s] /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/mapthread.c:191:3: warning: return makes pointer from integer without a cast [enabled by default]
[   60s]    return pthread_self();
[   60s]    ^
[   60s] /usr/bin/cmake -E cmake_progress_report /home/abuild/rpmbuild/BUILD/mapserver-7.0.0/build/CMakeFiles 30