cb3ed404cf
* [R] Enable OpenMP with AppleClang in XGBoost R package * Dramatically simplify install doc
56 lines
1.9 KiB
Plaintext
56 lines
1.9 KiB
Plaintext
### configure.ac -*- Autoconf -*-
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AC_PREREQ(2.62)
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AC_INIT([xgboost],[0.6-3],[],[xgboost],[])
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# Use this line to set CC variable to a C compiler
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AC_PROG_CC
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### Check whether backtrace() is part of libc or the external lib libexecinfo
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AC_MSG_CHECKING([Backtrace lib])
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AC_MSG_RESULT([])
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AC_CHECK_LIB([execinfo], [backtrace], [BACKTRACE_LIB=-lexecinfo], [BACKTRACE_LIB=''])
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### Endian detection
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AC_MSG_CHECKING([endian])
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AC_MSG_RESULT([])
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AC_RUN_IFELSE([AC_LANG_PROGRAM([[#include <stdint.h>]], [[const uint16_t endianness = 256; return !!(*(const uint8_t *)&endianness);]])],
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[ENDIAN_FLAG="-DDMLC_CMAKE_LITTLE_ENDIAN=1"],
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[ENDIAN_FLAG="-DDMLC_CMAKE_LITTLE_ENDIAN=0"])
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OPENMP_CXXFLAGS=""
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if test `uname -s` = "Linux"
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then
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OPENMP_CXXFLAGS="\$(SHLIB_OPENMP_CXXFLAGS)"
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fi
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if test `uname -s` = "Darwin"
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then
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OPENMP_CXXFLAGS='-Xclang -fopenmp'
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OPENMP_LIB='/usr/local/lib/libomp.dylib'
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ac_pkg_openmp=no
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AC_MSG_CHECKING([whether OpenMP will work in a package])
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AC_LANG_CONFTEST([AC_LANG_PROGRAM([[#include <omp.h>]], [[ return (omp_get_max_threads() <= 1); ]])])
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${CC} -o conftest conftest.c /usr/local/lib/libomp.dylib -Xclang -fopenmp 2>/dev/null && ./conftest && ac_pkg_openmp=yes
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AC_MSG_RESULT([${ac_pkg_openmp}])
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if test "${ac_pkg_openmp}" = no; then
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OPENMP_CXXFLAGS=''
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OPENMP_LIB=''
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echo '*****************************************************************************************'
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echo 'WARNING: OpenMP is unavailable on this Mac OSX system. Training speed may be suboptimal.'
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echo ' To use all CPU cores for training jobs, you should install OpenMP by running\n'
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echo ' brew install libomp'
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echo '*****************************************************************************************'
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fi
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fi
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AC_SUBST(OPENMP_CXXFLAGS)
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AC_SUBST(OPENMP_LIB)
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AC_SUBST(ENDIAN_FLAG)
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AC_SUBST(BACKTRACE_LIB)
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AC_CONFIG_FILES([src/Makevars])
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AC_OUTPUT
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