configure.in

来自「Glibc 2.3.2源代码(解压后有100多M)」· IN 代码 · 共 62 行

GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/powerpc64/elf.

if test "$usetls" != no; then
# Check for support of thread-local storage handling in assembler and
# linker.
AC_CACHE_CHECK(for powerpc64 TLS support, libc_cv_powerpc64_tls, [dnl
cat > conftest.s <<\EOF
        .section ".tdata","awT",@progbits
x:      .quad   1
x1:     .quad   1
x2:     .quad   1
x3:     .quad   1
x4:     .long   1
        .section ".toc","aw"
.LC0:
        .quad	x@dtpmod
        .quad	x@dtprel
.LC1:
        .quad	x1@dtpmod
        .quad	0
.LC2:
	.quad	x@tprel
        .text
        addi    3,2,x@got@tlsgd
        addi    3,2,.LC0@toc
        addi    3,2,x1@got@tlsld
        addi    9,3,x1@dtprel
        addis   9,3,x2@dtprel@ha
        addi    9,9,x2@dtprel@l
        ld      9,x3@got@dtprel(2)
        addi    3,2,.LC0@toc
        lwz     0,x1@dtprel(3)
        ld      0,x1@dtprel(3)
        addis   9,3,x2@dtprel@ha
        lwz     0,x2@dtprel@l(9)
        ld      0,x2@dtprel@l(9)
        ld      9,x3@got@dtprel(2)
        ld      9,x@got@tprel(2)
        add     9,9,x@tls
        ld      9,.LC2@toc(2)
        add     9,9,.LC2@tls
        addi    9,13,x1@tprel
        addis   9,13,x2@tprel@ha
        addi    9,9,x2@tprel@l
EOF
dnl
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
  libc_cv_powerpc64_tls=yes
else
  libc_cv_powerpc64_tls=no
fi
rm -f conftest*])
if test $libc_cv_powerpc64_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)