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cmake: check for libc++ directly

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Rather than trying to infer libc++ use from platform and compiler, just
look for a defined symbol.
This commit is contained in:
Matthew Barr
2017-04-06 10:53:28 +10:00
parent 19c7161d04
commit b1c57f9f54
2 changed files with 6 additions and 4 deletions
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6
cmake/boost.cmake
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@@ -3,10 +3,8 @@
set(BOOST_USE_STATIC_LIBS OFF)
set(BOOST_USE_MULTITHREADED OFF)
set(BOOST_USE_STATIC_RUNTIME OFF)
if (CMAKE_SYSTEM_NAME MATCHES "Darwin"
OR (CMAKE_SYSTEM_NAME MATCHES "FreeBSD"
AND CMAKE_C_COMPILER_ID MATCHES "Clang"))
# we need a more recent boost for libc++ used by clang on OSX and FreeBSD
if (HAVE_LIBCPP)
# we need a more recent boost for libc++
set(BOOST_MINVERSION 1.61.0)
else ()
set(BOOST_MINVERSION 1.57.0)