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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/i386/elf.
# Check for support of thread-local storage handling in assembler and
# linker.
AC_CACHE_CHECK(for i386 TLS support, libc_cv_386_tls, [dnl
cat > conftest.s <<\EOF
.section ".tdata", "awT", @progbits
.globl foo
foo: .long 1
.section ".tbss", "awT", @nobits
.globl bar
bar: .skip 4
.text
baz: leal bar@TLSLDM(%ebx), %eax
leal bar@DTPOFF(%eax), %edx
subl foo@GOTTPOFF(%edx), %eax
subl $bar@TPOFF, %eax
movl foo@GOTNTPOFF(%edx), %ecx
movl %gs:(%ecx), %eax
movl %gs:bar@NTPOFF, %eax
EOF
dnl
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
libc_cv_386_tls=yes
else
libc_cv_386_tls=no
fi
rm -f conftest*])
if test $libc_cv_386_tls = no; then
AC_MSG_ERROR([the assembler must support TLS])
fi
dnl It is always possible to access static and hidden symbols in an
dnl position independent way.
AC_DEFINE(PI_STATIC_AND_HIDDEN)
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