mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-27 01:27:39 +01:00
20 lines
599 B
Text
20 lines
599 B
Text
AC_DEFUN([LIBUNWIND___THREAD],
|
|
[dnl Check whether the compiler supports the __thread keyword.
|
|
if test "x$use__thread" != xno; then
|
|
AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
|
|
[cat > conftest.c <<\EOF
|
|
__thread int a = 42;
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
|
|
libc_cv_gcc___thread=yes
|
|
else
|
|
libc_cv_gcc___thread=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_gcc___thread" = yes; then
|
|
AC_DEFINE(HAVE___THREAD, 1,
|
|
[Define to 1 if __thread keyword is supported by the C compiler.])
|
|
fi
|
|
else
|
|
libc_cv_gcc___thread=no
|
|
fi])
|