Hi! Testing found that we also need libquadmath to be built with -mno-gnu-attribute, otherwise -mabi=ieeelongdouble programs don't link.
Ok for power-ieee128? 2022-01-03 Jakub Jelinek <ja...@redhat.com> * configure.ac: Set XCFLAGS to -mno-gnu-attribute on powerpc64le*-linux*. * configure: Regenerated. --- libquadmath/configure.ac +++ libquadmath/configure.ac @@ -352,6 +352,19 @@ fi # Add CET specific flags if CET is enabled GCC_CET_FLAGS(CET_FLAGS) XCFLAGS="$XCFLAGS $CET_FLAGS" + +case x$target in + xpowerpc64le*-linux*) + AC_PREPROC_IFELSE( + [AC_LANG_PROGRAM([[#if __SIZEOF_LONG_DOUBLE__ != 16 + #error long double is double + #endif]], + [[(void) 0;]])], + [XCFLAGS="$XCFLAGS -mno-gnu-attribute"]) + ;; + *) + ;; +esac AC_SUBST(XCFLAGS) AC_CACHE_SAVE --- libquadmath/configure +++ libquadmath/configure @@ -13096,6 +13096,30 @@ fi XCFLAGS="$XCFLAGS $CET_FLAGS" +case x$target in + xpowerpc64le*-linux*) + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#if __SIZEOF_LONG_DOUBLE__ != 16 + #error long double is double + #endif +int +main () +{ +(void) 0; + ; + return 0; +} +_ACEOF +if ac_fn_c_try_cpp "$LINENO"; then : + XCFLAGS="$XCFLAGS -mno-gnu-attribute" +fi +rm -f conftest.err conftest.i conftest.$ac_ext + ;; + *) + ;; +esac + cat >confcache <<\_ACEOF # This file is a shell script that caches the results of configure Jakub