configure.in

来自「glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的」· IN 代码 · 共 33 行

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

if test "$usetls" != no; then
# Check for support of thread-local storage handling in assembler and
# linker.
AC_CACHE_CHECK(for SH TLS support, libc_cv_sh_tls, [dnl
cat > conftest.S <<\EOF
	.section ".tdata", "awT", @progbits
foo:	.long	25
	.text
	.long	foo@TLSGD
	.long	foo@TLSLDM
	.long	foo@DTPOFF
	.long	foo@GOTTPOFF
	.long	foo@TPOFF
EOF
dnl
if AC_TRY_COMMAND(${CC-cc} -S $CFLAGS conftest.S 1>&AS_MESSAGE_LOG_FD); then
  libc_cv_sh_tls=yes
else
  libc_cv_sh_tls=no
fi
rm -f conftest*])
if test $libc_cv_sh_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)