https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105681
Bug ID: 105681 Summary: libstdc++-v3 fails to build on msp430 Product: gcc Version: 12.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: beagleboard at davidjohnsummers dot uk Target Milestone: --- Hi, I'm trying to build gcc for an msp430 cpu, using gcc12.1.0 binuitils-2.38 and newlib-4.2.0.20211231. Now I can build c fine, but when I try to build c++ libstdc++-v3 fails, I think becuase the msp430 is only a 16bit processor. The specific configure command used is: ../../gcc-git/configure --with-sysroot=/home/summers/msp430 --prefix=/home/summers/msp430 --target=msp430-elf --disable-nls --disable-werror --with-native-system-header-dir=/home/summers/msp430/msp430-elf/include --with-newlib --enable-languages=c,c++ --disable-nls --enable-initfini-array --enable-target-optspace --with-gmp --with-mpfr --with-mpc --with-isl -enable-newlib-nano-malloc This has binutils and newlib copied into the gcc source directory. The native system header is pointed at newlib header files. The build fails with errors like: In file included from /home/summers/msp430/gcc-git/libstdc++-v3/include/precompiled/extc++.h:61: /home/summers/msp430/src/gcc-binutils-newlib/msp430-elf/libstdc++-v3/include/ext/random:355:69: error: narrowing conversion of '86243' from 'long int' to 'unsigned int' [-Wnarrowing] 355 | 0x00000000U, 0xe9528d85U> | ^ I also tried the build with the git version of gcc, last weekend (14/5/22) and had exactly the same error. So is this a bug, or have I configured something wrong. Does libstdc++-v3 just need to be made 16bit aware?