diff options
Diffstat (limited to 'sysdeps/x86_64/elf/configure.in')
| -rw-r--r-- | sysdeps/x86_64/elf/configure.in | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sysdeps/x86_64/elf/configure.in b/sysdeps/x86_64/elf/configure.in new file mode 100644 index 0000000000..7679a09b76 --- /dev/null +++ b/sysdeps/x86_64/elf/configure.in @@ -0,0 +1,35 @@ +sinclude(./aclocal.m4)dnl Autoconf lossage +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/x86_64/elf. + +if test "$usetls" != no; then +# Check for support of thread-local storage handling in assembler and linker. +AC_CACHE_CHECK(for x86-64 TLS support, libc_cv_x86_64_tls, [dnl +cat > conftest.s <<\EOF + .section ".tdata", "awT", @progbits + .globl foo +foo: .quad 1 + .section ".tbss", "awT", @nobits + .globl bar +bar: .skip 8 + .text +baz: leaq bar@TLSLD(%rip), %rdi + leaq bar@DTPOFF(%rax), %rcx + addq foo@GOTTPOFF(%rip), %rax + movq $bar@TPOFF, %rdx +EOF +dnl +if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AC_FD_CC); then + libc_cv_x86_64_tls=yes +else + libc_cv_x86_64_tls=no +fi +rm -f conftest*]) +if test $libc_cv_x86_64_tls = yes; then + AC_DEFINE(HAVE_TLS_SUPPORT) +fi +fi + +dnl It is always possible to access static and hidden symbols in an +dnl position independent way. +AC_DEFINE(PI_STATIC_AND_HIDDEN) |