I encountered a bug when trying to build a RISC-V GCC cross-compiler. I
believe that the most relevant configure options that I used are:
--disable-multilib --with-arch=rv32ia --with-abi=ilp32 However, I can
post a full list if needed. I have the GCC git tree located at the path
"/home/quantum/devel/git/gcc" and am building it inside the
sub-directory "build1". It seems to fail when attempting to build the
self-tests. Here is an excerpt from the build output:
/home/quantum/devel/git/gcc/build1/./gcc/xgcc
-B/home/quantum/devel/git/gcc/build1/./gcc/ -xc -nostdinc /dev/null -S
-o /dev/null -fself-test=.././../gcc/testsuite/selftests
/home/quantum/devel/git/gcc/build1/./gcc/xgcc
-B/home/quantum/devel/git/gcc/build1/./gcc/ -xc++ -nostdinc /dev/null
-S -o /dev/null -fself-test=.././../gcc/testsuite/selftests cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension cc1plus: error:
'-mdiv' requires '-march' to subsume the 'M' extension It seems to be
trying to build test suites that are in conflict with my march settings.
Interestingly, I didn't have this issue when trying to build the release
version tagged "releases/gcc-13.2.0". However, I wanted to use some
newer features that were only merged less than a month ago. I tried to
build the GIT tree and encountered this error. I attempted to bisect
the issue and found that it only happens when gcc/DEV-PHASE is set to:
experimental I'm not very familar with GCC's build system, but this
suggests to me that the tests are only conditionally built on
experimental/development codebase snapshots. Michael T. Kloos
