Use a C++ compiler for the atomic builtin check since we'll
be using a C++ compiler to build.
Patch by Török Edwin!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109646 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 9541b8a..0924a77 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1355,6 +1355,9 @@
dnl atomic builtins are required for threading support.
AC_MSG_CHECKING(for GCC atomic builtins)
+dnl Since we'll be using these atomic builtins in C++ files we should test
+dnl the C++ compiler.
+AC_LANG_PUSH([C++])
AC_LINK_IFELSE(
AC_LANG_SOURCE(
[[int main() {
@@ -1366,6 +1369,7 @@
return 0;
}
]]),
+ AC_LANG_POP([C++])
AC_MSG_RESULT(yes)
AC_DEFINE(LLVM_MULTITHREADED, 1, Build multithreading support into LLVM),
AC_MSG_RESULT(no)