Description: Do not use external libraries - use system libraries 
Author: Steffen Moeller <moeller@debian.org>, Andreas Tille <tille@debian.org>, Nilesh Patra <npatra974@gmail.com>
Forwarded: not-needed
Last-Update: 2020-10-27 
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,8 +11,8 @@
 find_package(Threads REQUIRED)
 
 # Use all standard-compliant optimizations
-set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O3 -mcx16 -g")
-set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -mcx16 -g")
+set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O3 -g -fPIC -fopenmp")
+set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -g -fPIC -fopenmp")
 
 # Set the output folder where your program will be created
 set(CMAKE_BINARY_DIR ${CMAKE_SOURCE_DIR}/bin)
@@ -22,110 +22,22 @@
 # The following folder will be included
 include_directories("${PROJECT_SOURCE_DIR}")
 
-# Add external projects
-include(${CMAKE_ROOT}/Modules/ExternalProject.cmake)
-
-# TODO: We're using INSTALL_DIR very wrong. We *should* be actually installing
-# the external projects into their prefixes and working with the installed
-# files. Instead we're building but not installing them and trying to work with
-# the non-installed build trees.
-# 
-# Hence the blanked out INSTALL_COMMANDs to suppress the install step.
-#
-# We need to NOT blank out UPDATE_COMMAND or we can never change the Git revision we point to.
-# The cost of this is that we have to re-configure on every build if we do update.
-
-# sdsl-lite (full build using its cmake config)
-ExternalProject_Add(sdsl-lite
-  GIT_REPOSITORY "https://github.com/simongog/sdsl-lite.git"
-  GIT_TAG "ddb0fbbc33bb183baa616f17eb48e261ac2a3672"
-  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${INSTALL_DIR} # TODO ADD static build flag
-  UPDATE_COMMAND ""
-  INSTALL_COMMAND "")
-ExternalProject_Get_property(sdsl-lite INSTALL_DIR)
-set(sdsl-lite_INCLUDE "${INSTALL_DIR}/src/sdsl-lite-build/include")
-set(sdsl-lite-divsufsort_INCLUDE "${INSTALL_DIR}/src/sdsl-lite-build/external/libdivsufsort/include")
-set(sdsl-lite_LIB "${INSTALL_DIR}/src/sdsl-lite-build/lib")
-set(sdsl-lite-divsufsort_LIB "${INSTALL_DIR}/src/sdsl-lite-build/external/libdivsufsort/lib")
-
-# DYNAMIC (full build using its cmake config)
-ExternalProject_Add(dynamic
-  GIT_REPOSITORY "https://github.com/vgteam/DYNAMIC.git"
-  GIT_TAG "615d8be5276bcd4c5a3d8e31679b4f8e81b2eefc"
-  # we don't actually install dynamic... it's header only
-  #CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${INSTALL_DIR}
-  UPDATE_COMMAND ""
-  INSTALL_COMMAND ""
-  BUILD_COMMAND ""
-  CONFIGURE_COMMAND "")
-ExternalProject_Get_property(dynamic INSTALL_DIR)
-set(dynamic_INCLUDE "${INSTALL_DIR}/src/dynamic/include")
-
-# In-place Parallel Super Scalar Samplesort (IPS⁴o), header only
-ExternalProject_Add(ips4o
-  GIT_REPOSITORY "https://github.com/SaschaWitt/ips4o.git"
-  GIT_TAG "a34d7d40c0f1279510e35e0dc2c69637b3c5d0b6"
-  #GIT_REPOSITORY "https://github.com/ekg/ips4o.git"
-  #GIT_TAG "f7eccc5a26928b5c0772922f7b76072414ef1801"
-  UPDATE_COMMAND ""
-  INSTALL_COMMAND ""
-  BUILD_COMMAND ""
-  CONFIGURE_COMMAND "")
-ExternalProject_Get_property(ips4o SOURCE_DIR)
-set(ips4o_INCLUDE "${SOURCE_DIR}")
-
-# atomic queue
-ExternalProject_Add(atomicqueue
-  GIT_REPOSITORY "https://github.com/max0x7ba/atomic_queue.git"
-  GIT_TAG "430f732da0889b090705ad00ce15d4463fe7b536"
-  UPDATE_COMMAND ""
-  INSTALL_COMMAND ""
-  BUILD_COMMAND ""
-  CONFIGURE_COMMAND "")
-ExternalProject_Get_property(atomicqueue SOURCE_DIR)
-set(atomicqueue_INCLUDE "${SOURCE_DIR}")
-
-# paryfor parallel_for
-ExternalProject_Add(paryfor
-  GIT_REPOSITORY "https://github.com/ekg/paryfor"
-  GIT_TAG "509b28a092f732a068e2908bb9e359a8562cd32f"
-  UPDATE_COMMAND ""
-  INSTALL_COMMAND ""
-  BUILD_COMMAND ""
-  CONFIGURE_COMMAND "")
-ExternalProject_Get_property(paryfor SOURCE_DIR)
-set(paryfor_INCLUDE "${SOURCE_DIR}")
-
-# taywee's C++ args library, header only
-ExternalProject_Add(tayweeargs
-  GIT_REPOSITORY "https://github.com/Taywee/args.git"
-  GIT_TAG "3de44ec671db452cc0c4ef86399b108939768abb"
-  UPDATE_COMMAND ""
-  INSTALL_COMMAND "")
-ExternalProject_Get_property(tayweeargs SOURCE_DIR)
-set(tayweeargs_INCLUDE "${SOURCE_DIR}")
-
-#set(CMAKE_BUILD_TYPE Release)
+set(atomicqueue_INCLUDE "/usr/include/atomic_queue")
 
 # set up our target executable and specify its dependencies and includes
 add_executable(mmmulti
   ${CMAKE_SOURCE_DIR}/src/main.cpp
   )
-add_dependencies(mmmulti sdsl-lite)
-add_dependencies(mmmulti dynamic)
-add_dependencies(mmmulti ips4o)
-add_dependencies(mmmulti atomicqueue)
-add_dependencies(mmmulti paryfor)
-add_dependencies(mmmulti tayweeargs)
 target_include_directories(mmmulti PUBLIC
   "${CMAKE_SOURCE_DIR}/src"
-  "${sdsl-lite_INCLUDE}"
-  "${sdsl-lite-divsufsort_INCLUDE}"
-  "${dynamic_INCLUDE}"
-  "${ips4o_INCLUDE}"
+#  "${sdsl-lite_INCLUDE}"
+#  "${sdsl-lite-divsufsort_INCLUDE}"
+#  "${dynamic_INCLUDE}"
+#  "${ips4o_INCLUDE}"
   "${atomicqueue_INCLUDE}"
-  "${paryfor_INCLUDE}"
-  "${tayweeargs_INCLUDE}")
+#  "${paryfor_INCLUDE}"
+#  "${tayweeargs_INCLUDE}"
+  )
   
 # macOS doesn't want you to link in libatomic this way
 if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
@@ -137,9 +49,9 @@
     )
 elseif (TRUE)
   target_link_libraries(mmmulti
-    "${sdsl-lite_LIB}/libsdsl.a"
-    "${sdsl-lite-divsufsort_LIB}/libdivsufsort.a"
-    "${sdsl-lite-divsufsort_LIB}/libdivsufsort64.a"
+    "-lsdsl"
+    "-ldivsufsort"
+    "-ldivsufsort64"
     "-latomic"
     Threads::Threads
     )
@@ -150,7 +62,7 @@
 elseif (TRUE)
   # this was hard to track down
   # https://stackoverflow.com/questions/35116327/when-g-static-link-pthread-cause-segmentation-fault-why
-  set(CMAKE_EXE_LINKER_FLAGS "-static -Wl,--whole-archive -lpthread -Wl,--no-whole-archive")
+  set (CMAKE_SHARED_LINKER_FLAGS "-lpthread -Wl,--as-needed")
 endif()