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Add -lrt to Linux link so it will work with CentOS 6.

This commit is contained in:
wb2osz 2019-11-29 16:40:27 -05:00
parent 249f5bd471
commit b382e5fb0f
1 changed files with 11 additions and 2 deletions
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11
CMakeLists.txt
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@ -180,8 +180,17 @@ if (C_CLANG OR C_GCC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wvla -ffast-math -ftree-vectorize -D_GNU_SOURCE ${EXTRA_FLAGS}")
#
#
# for math.h
# -lm is needed for functins in math.h
if (LINUX)
# We have another problem with CentOS 6. clock_gettime() is in librt so we need -lrt.
# The clock_* functions were moved into gnu libc for version 2.17.
# https://sourceware.org/ml/libc-announce/2012/msg00001.html
# If using gnu libc 2.17, or later, the -lrt is no longer needed but doesn't hurt.
# I'm making this conditional on LINUX because it is not needed for BSD and MacOSX.
link_libraries("-lrt -lm")
else()
link_libraries("-lm")
endif()
elseif (C_MSVC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -W3 -MP ${EXTRA_FLAGS}")
endif()