Build broken on Ubuntu noble due to redefining -D_FORTIFY_SOURCE

[tjaalton]

cd /<<PKGBUILDDIR>>/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /<<PKGBUILDDIR>> /<<PKGBUILDDIR>>/IGC/GenISAIntrinsics /<<PKGBUILDDIR>>/build /<<PKGBUILDDIR>>/build/IGC/GenISAIntrinsics /<<PKGBUILDDIR>>/build/IGC/GenISAIntrinsics/CMakeFiles/GenISAIntrinsics.dir/DependInfo.cmake "--color="
make[4]: Leaving directory '/<<PKGBUILDDIR>>/build'
make  -f IGC/GenISAIntrinsics/CMakeFiles/GenISAIntrinsics.dir/build.make IGC/GenISAIntrinsics/CMakeFiles/GenISAIntrinsics.dir/build
make[4]: Entering directory '/<<PKGBUILDDIR>>/build'
[  0%] Building CXX object IGC/GenISAIntrinsics/CMakeFiles/GenISAIntrinsics.dir/__/Release/GenIntrinsicDefinition.cpp.o
cd /<<PKGBUILDDIR>>/build/IGC/GenISAIntrinsics && /usr/bin/c++ -DCL_KHR_FP64_EXT -DGHAL3D=USC -DICBE_LINUX -DIGC_CMAKE -DIGC_EXPORTS=1 -DIGC_SPIRV_ENABLED -DIGC_SPIRV_TOOLS_ENABLED -DIGC_VC_ENABLED -DINSIDE_PLUGIN -DISTDLIB_UMD -DLINUX -DLLVM_VERSION_MAJOR=14 -DNDEBUG -DNOMINMAX -DSTD_CALL -DUSC_EXPORTS=1 -DUSE_MMX -DUSE_SSE -DUSE_SSE2 -DUSE_SSE3 -DUSE_SSSE3 -D_AMD64_ -D_COMPILER_DLL_ -D_CRT_SECURE_NO_WARNINGS -D_HAS_EXCEPTIONS=0 -D_IGC_ -D_SCL_SECURE_NO_WARNINGS -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -I/<<PKGBUILDDIR>> -I/<<PKGBUILDDIR>>/IGC/WrapperLLVM/include -I/<<PKGBUILDDIR>>/build/IGC/autogen -I/<<PKGBUILDDIR>>/IGC -I/<<PKGBUILDDIR>>/IGC/common -I/<<PKGBUILDDIR>>/IGC/.. -I/<<PKGBUILDDIR>>/IGC/../Common -I/<<PKGBUILDDIR>>/IGC/../3d/common -I/<<PKGBUILDDIR>>/IGC/../inc -I/<<PKGBUILDDIR>>/IGC/../inc/common -I/<<PKGBUILDDIR>>/IGC/../inc/common/Compiler -I/<<PKGBUILDDIR>>/IGC/../inc/common/Compiler/API -I/<<PKGBUILDDIR>>/IGC/../visa/include -I/<<PKGBUILDDIR>>/build/IGC/Release -I/<<PKGBUILDDIR>>/build/IGC -I/<<PKGBUILDDIR>>/IGC/AdaptorOCL/ocl_igc_shared/executable_format -I/<<PKGBUILDDIR>>/IGC/AdaptorOCL -I/<<PKGBUILDDIR>>/build/IGC/AdaptorOCL/ocl_igc_interface/impl -I/<<PKGBUILDDIR>>/IGC/Options -I/<<PKGBUILDDIR>>/IGC/Options/include -I/<<PKGBUILDDIR>>/build/IGC/Options/include -I/<<PKGBUILDDIR>>/IGC/../inc/common/Compiler/common -I/<<PKGBUILDDIR>>/IGC/AdaptorOCL/cif/cif/.. -I/<<PKGBUILDDIR>>/IGC/ZEBinWriter/zebin/source -I/<<PKGBUILDDIR>>/IGC/ZEBinWriter/zebin/source/autogen -I/include -I/usr/lib/x86_64-linux-gnu/cmake/SPIRV-Tools/../../../include -I/<<PKGBUILDDIR>>/IGC/GenISAIntrinsics -isystem /usr/lib/llvm-14/include -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fdebug-prefix-map=/<<PKGBUILDDIR>>=/usr/src/intel-graphics-compiler-1.0.15468.25-2 -Wdate-time -fexceptions -fdata-sections -ffunction-sections -O2 -pipe -fmessage-length=0 -march=corei7 -mstackrealign -fms-extensions -Werror -Wno-unused-parameter -Wno-missing-field-initializers -Wwrite-strings -Wno-long-long -Wswitch -Wno-sign-compare -Wno-unused-result -Wno-enum-compare -Wno-type-limits -Wno-ignored-qualifiers -Wno-shadow -Wformat-security -Wno-extra -Wno-write-strings -finline -fno-strict-aliasing -msse -msse2 -msse3 -mssse3 -msse4 -msse4.1 -msse4.2 -Wno-unknown-pragmas -fPIC -Bsymbolic -D_FORTIFY_SOURCE=2 -fstack-protector -finline-functions -funswitch-loops -Wno-maybe-uninitialized -lrt -fno-rtti -fvisibility=hidden -fvisibility-inlines-hidden -DNDEBUG -g -std=gnu++17 -MD -MT IGC/GenISAIntrinsics/CMakeFiles/GenISAIntrinsics.dir/__/Release/GenIntrinsicDefinition.cpp.o -MF CMakeFiles/GenISAIntrinsics.dir/__/Release/GenIntrinsicDefinition.cpp.o.d -o CMakeFiles/GenISAIntrinsics.dir/__/Release/GenIntrinsicDefinition.cpp.o -c /<<PKGBUILDDIR>>/build/IGC/Release/GenIntrinsicDefinition.cpp
<command-line>: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>: note: this is the location of the previous definition

so please add -U_FORTIFY_SOURCE before defining it in IGC/CMakeLists.txt

[hector-cao]

An alternative solution would be to make IGC/CMakeLists.txt aware of the presence of D_FORTIFY_SOURCE in the environment and skip defining it again (or in case you strongly want to set the value of _FORTIFY_SOURCE to 2 for some reasons, undefine it first with -U as @tjaalton proposed)

[eero-t]

An alternative solution would be to make IGC/CMakeLists.txt aware of the presence of D_FORTIFY_SOURCE in the environment and skip defining it again (or in case you strongly want to set the value of _FORTIFY_SOURCE to 2 for some reasons, undefine it first with -U as @tjaalton proposed)

@pszymich Ubuntu updating its FORTIFY_SOURCE value of 2 in 22.04, to 3 in 24.04: https://ubuntu.com/blog/whats-new-in-security-for-ubuntu-24-04-lts

Is not the only distro doing such change. Fedora did similar change in 38: https://fedoraproject.org/wiki/Changes/Add_FORTIFY_SOURCE%3D3_to_distribution_build_flags

So that change is going to eventually propagate to RHEL too...