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| -rw-r--r-- | autoconf/configure.ac | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/autoconf/configure.ac b/autoconf/configure.ac index 9541b8a46c..0924a777b4 100644 --- a/autoconf/configure.ac +++ b/autoconf/configure.ac @@ -1355,6 +1355,9 @@ fi 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 @@ AC_LINK_IFELSE( return 0; } ]]), + AC_LANG_POP([C++]) AC_MSG_RESULT(yes) AC_DEFINE(LLVM_MULTITHREADED, 1, Build multithreading support into LLVM), AC_MSG_RESULT(no) |