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>&AS_MESSAGE_LOG_FD); 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)