diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 6a3a9ab620..fce967f2c2 100644 --- a/configure.ac +++ b/configure.ac @@ -1673,6 +1673,29 @@ elif test "$libc_cv_ehdr_start" = broken; then AC_MSG_WARN([linker is broken -- you should upgrade]) fi +dnl Starting with binutils 2.35, GAS can attach multiple symbol versions +dnl to one symbol (PR 23840). +AC_CACHE_CHECK(whether the assembler requires one version per symbol, + libc_cv_symver_needs_alias, [dnl + cat > conftest.s <<EOF + .text +testfunc: + .globl testfunc + .symver testfunc, testfunc1@VERSION1 + .symver testfunc, testfunc1@VERSION2 +EOF + libc_cv_symver_needs_alias=no + if ${CC-cc} $ASFLAGS -c conftest.s 2>&AS_MESSAGE_LOG_FD; then + libc_cv_symver_needs_alias=no + else + libc_cv_symver_needs_alias=yes + fi + rm conftest.* +]) +if test "$libc_cv_symver_needs_alias" = yes; then + AC_DEFINE(SYMVER_NEEDS_ALIAS) +fi + AC_CACHE_CHECK(for __builtin_trap with no external dependencies, libc_cv_builtin_trap, [dnl libc_cv_builtin_trap=no |