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Diffstat (limited to 'cmake/modules/FindM.cmake')
| -rw-r--r-- | cmake/modules/FindM.cmake | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/cmake/modules/FindM.cmake b/cmake/modules/FindM.cmake index f0779bffff..414ededbff 100644 --- a/cmake/modules/FindM.cmake +++ b/cmake/modules/FindM.cmake @@ -12,7 +12,27 @@ IF (M_INCLUDE_DIRS) SET(M_FIND_QUIETLY TRUE) ENDIF (M_INCLUDE_DIRS) +# +# On OS X, make sure we do *NOT* find math.h in the Kernel framework, +# as that will convince CMake to cause the build to look there for +# headers. +# +# For some unknown reason, on Yosemite, math.h is included in the Kernel +# framework. That framework exists to supply headers for building +# *kernel* modules; it includes versions of C headers that are similar +# to the standard userland headers, but not similar enough to be usable +# when building userland code. +# +# Unless told not to look first in the framework paths, CMake will, on +# Yosemite, or when using the Yosemite SDK, find math.h in the Kernel +# framework, and add the header directory for the Kernel framework to +# the list of places to look for headers, causing it to pick up other +# headers from there as well. This causes the build to fail. +# +SET(SAVED_CMAKE_FIND_FRAMEWORK ${CMAKE_FIND_FRAMEWORK}) +SET(CMAKE_FIND_FRAMEWORK LAST) FIND_PATH(M_INCLUDE_DIR math.h) +SET(CMAKE_FIND_FRAMEWORK ${SAVED_CMAKE_FIND_FRAMEWORK}) SET(M_NAMES m) FIND_LIBRARY(M_LIBRARY NAMES ${M_NAMES} ) |