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[pstl] Error out when the backend is left unspecified

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Instead of silently falling back to the serial backend, it's better if
we fail loudly when the parallel backend is left unspecified. Since we
have a __pstl_config_site header, a backend should always be specified.

llvm-svn: 368285
This commit is contained in:
Louis Dionne 2019-08-08 12:43:13 +00:00
parent bf4808439f
commit a8a436ef95
1 changed files with 1 additions and 3 deletions
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4
pstl/include/pstl/internal/pstl_config.h
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@ -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