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# glog depends on gflags
include("cmake/External/gflags.cmake")
if (NOT __GLOG_INCLUDED)
set(__GLOG_INCLUDED TRUE)
# try the system-wide glog first
find_package(Glog)
if (GLOG_FOUND)
set(GLOG_EXTERNAL FALSE)
else()
# fetch and build glog from github
# build directory
set(glog_PREFIX ${CMAKE_BINARY_DIR}/external/glog-prefix)
# install directory
set(glog_INSTALL ${CMAKE_BINARY_DIR}/external/glog-install)
# we build glog statically, but want to link it into the caffe shared library
# this requires position-independent code
if (UNIX)
set(GLOG_EXTRA_COMPILER_FLAGS "-fPIC")
endif()
set(GLOG_CXX_FLAGS ${CMAKE_CXX_FLAGS} ${GLOG_EXTRA_COMPILER_FLAGS})
set(GLOG_C_FLAGS ${CMAKE_C_FLAGS} ${GLOG_EXTRA_COMPILER_FLAGS})
# depend on gflags if we're also building it
if (GFLAGS_EXTERNAL)
set(GLOG_DEPENDS gflags)
endif()
ExternalProject_Add(glog
DEPENDS ${GLOG_DEPENDS}
PREFIX ${glog_PREFIX}
GIT_REPOSITORY "https://github.com/google/glog"
GIT_TAG "v0.3.4"
UPDATE_COMMAND ""
INSTALL_DIR ${gflags_INSTALL}
PATCH_COMMAND autoreconf -i ${glog_PREFIX}/src/glog
CONFIGURE_COMMAND env "CFLAGS=${GLOG_C_FLAGS}" "CXXFLAGS=${GLOG_CXX_FLAGS}" ${glog_PREFIX}/src/glog/configure --prefix=${glog_INSTALL} --enable-shared=no --enable-static=yes --with-gflags=${GFLAGS_LIBRARY_DIRS}/..
LOG_DOWNLOAD 1
LOG_CONFIGURE 1
LOG_INSTALL 1
)
set(GLOG_FOUND TRUE)
set(GLOG_INCLUDE_DIRS ${glog_INSTALL}/include)
set(GLOG_LIBRARIES ${GFLAGS_LIBRARIES} ${glog_INSTALL}/lib/libglog.a)
set(GLOG_LIBRARY_DIRS ${glog_INSTALL}/lib)
set(GLOG_EXTERNAL TRUE)
list(APPEND external_project_dependencies glog)
endif()
endif()
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