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FindOpenMP: Use NO_DEFAULT_PATH where appropriate

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OpenMP libraries must always be found in the implicit linking
directories of a compiler when using the OpenMP compile flag. If a suitable OpenMP library is also found in for example some CMAKE_PREFIX_PATH, this can lead to the module finding the incorrect library.
On the other hand, CMAKE_PREFIX_PATH can't ever be a location that we
need to consider since the OpenMP compile flag would not work if we
needed to.
This commit is contained in:
Christian Pfeiffer
2017-11-15 15:05:41 +01:00
parent e312885829
commit 98314d536e
1 changed files with 3 additions and 0 deletions
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3
Modules/FindOpenMP.cmake
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@@ -230,6 +230,7 @@ function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
DOC "Path to the ${_OPENMP_IMPLICIT_LIB_PLAIN} library for OpenMP"
HINTS ${OpenMP_${LANG}_IMPLICIT_LINK_DIRS}
CMAKE_FIND_ROOT_PATH_BOTH
NO_DEFAULT_PATH
)
endif()
mark_as_advanced(OpenMP_${_OPENMP_IMPLICIT_LIB_PLAIN}_LIBRARY)
@@ -244,6 +245,8 @@ function(_OPENMP_GET_FLAGS LANG FLAG_MODE OPENMP_FLAG_VAR OPENMP_LIB_NAMES_VAR)
find_library(OpenMP_libiomp5md_LIBRARY
NAMES "libiomp5md"
HINTS ${CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES}
CMAKE_FIND_ROOT_PATH_BOTH
NO_DEFAULT_PATH
)
mark_as_advanced(OpenMP_libiomp5md_LIBRARY)
else()