(LIBUNWIND__THREAD): New test.
(Logical change 1.22)
diff --git a/aclocal.m4 b/aclocal.m4
index 14d1253..374f9cd 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -946,7 +946,7 @@
m4_ifndef([_AM_Config_Header_Index], m4_define([_AM_Config_Header_Index], [0]))
dnl prepare to store our destination file list for use in config.status
AC_FOREACH([_AM_File], [$1],
- [m4_pushdef([_AM_Dest], m4_patsubst(_AM_File, [:.*]))
+ [m4_pushdef([_AM_Dest], patsubst(_AM_File, [:.*]))
m4_define([_AM_Config_Header_Index], m4_incr(_AM_Config_Header_Index))
dnl and add it to the list of files AC keeps track of, along
dnl with our hook
@@ -987,12 +987,31 @@
# -----------------
# Like AS_DIRNAME, only do it during macro expansion
AC_DEFUN([_AM_DIRNAME],
- [m4_if(m4_regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
- m4_if(m4_regexp([$1], [^//\([^/]\|$\)]), -1,
- m4_if(m4_regexp([$1], [^/.*]), -1,
+ [m4_if(regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
+ m4_if(regexp([$1], [^//\([^/]\|$\)]), -1,
+ m4_if(regexp([$1], [^/.*]), -1,
[.],
- m4_patsubst([$1], [^\(/\).*], [\1])),
- m4_patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
- m4_patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
+ patsubst([$1], [^\(/\).*], [\1])),
+ patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
+ patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
]) # _AM_DIRNAME
+AC_DEFUN([LIBUNWIND___THREAD],
+[dnl Check whether the compiler supports the __thread keyword.
+if test "x$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)
+ fi
+else
+ libc_cv_gcc___thread=no
+fi])