diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 61a13cd147..f120ef41aa 100644 --- a/configure.in +++ b/configure.in @@ -1513,6 +1513,22 @@ if test "$libc_cv_gcc_subtract_local_labels" = yes; then AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS) fi +dnl Check whether the compiler supports the __thread keyword. +AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, +[cat > conftest.c <<EOF +__thread int a = 42; +EOF +if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AC_FD_CC]); then + libc_cv_gcc___thread=yes +else + libc_cv_gcc___thread=no +fi +rm -f conftest*]) +if test "$libc_cv_gcc___thread" = yes; then + AC_DEFINE(HAVE___THREAD) +fi + + dnl Check whether we have the gd library available. AC_MSG_CHECKING(for libgd) if test "$with_gd" != "no"; then |