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-rw-r--r--pstl/include/pstl/internal/pstl_config.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/pstl/include/pstl/internal/pstl_config.h b/pstl/include/pstl/internal/pstl_config.h
index ba0bc14..c2a737b 100644
--- a/pstl/include/pstl/internal/pstl_config.h
+++ b/pstl/include/pstl/internal/pstl_config.h
@@ -19,9 +19,7 @@
#define _PSTL_VERSION_PATCH (_PSTL_VERSION % 10)
#if !defined(_PSTL_PAR_BACKEND_SERIAL) && !defined(_PSTL_PAR_BACKEND_TBB)
-// TODO: In the future, we need to handle this setting using a configure-time
-// option and something like a __config_site header.
-# define _PSTL_PAR_BACKEND_SERIAL
+# error "A parallel backend must be specified"
#endif
// Check the user-defined macro for warnings