From 7a867082d84905be5efcc39c820a23e7aa19eff0 Mon Sep 17 00:00:00 2001
From: Sacha <xsacha@gmail.com>
Date: Wed, 23 Aug 2017 11:16:24 +1000
Subject: [PATCH] Fix open_blas.config which was never working out-of-source.
 Remove need for gen_config_h.exe. If OpenMP is requested, do not silently
 ignore when it isn't available.

---
 CMakeLists.txt       | 27 +++++++++++++++------------
 cmake/arch.cmake     |  4 +---
 cmake/prebuild.cmake | 19 -------------------
 3 files changed, 16 insertions(+), 34 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index be6729974..da13f8a0b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -199,18 +199,21 @@ set_target_properties(${OpenBLAS_LIBNAME} PROPERTIES
 install(TARGETS ${OpenBLAS_LIBNAME}
 	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
-
-# Install include files
-set (GENCONFIG_BIN ${CMAKE_BINARY_DIR}/gen_config_h${CMAKE_EXECUTABLE_SUFFIX})
-
-execute_process(COMMAND ${GENCONFIG_BIN}
-                        ${CMAKE_CURRENT_SOURCE_DIR}/config.h
-                        ${CMAKE_CURRENT_SOURCE_DIR}/openblas_config_template.h
-                OUTPUT_VARIABLE OPENBLAS_CONFIG_H_CONTENTS)
-
-file(WRITE ${CMAKE_BINARY_DIR}/openblas_config.tmp "${OPENBLAS_CONFIG_H_CONTENTS}")
-configure_file(${CMAKE_BINARY_DIR}/openblas_config.tmp ${CMAKE_BINARY_DIR}/openblas_config.h COPYONLY)
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
+  
+set(OPENBLAS_TMP ${CMAKE_BINARY_DIR}/openblas_config.tmp)
+file(WRITE  ${OPENBLAS_TMP} "#ifndef OPENBLAS_CONFIG_H\n")
+file(APPEND ${OPENBLAS_TMP} "#define OPENBLAS_CONFIG_H\n")
+file(STRINGS ${PROJECT_BINARY_DIR}/config.h __lines)
+foreach(line ${__lines})
+  string(REPLACE "#define " "" line ${line})
+  file(APPEND ${OPENBLAS_TMP} "#define OPENBLAS_${line}\n")
+endforeach()
+file(APPEND ${OPENBLAS_TMP} "#define OPENBLAS_VERSION \"OpenBLAS ${OpenBLAS_VERSION}\"\n")
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/openblas_config_template.h __template)
+file(APPEND ${OPENBLAS_TMP} "${__template}")
+file(APPEND ${OPENBLAS_TMP} "#endif /* OPENBLAS_CONFIG_H */\n")
+configure_file(${OPENBLAS_TMP} ${CMAKE_BINARY_DIR}/openblas_config.h COPYONLY)
 
 install (FILES ${CMAKE_BINARY_DIR}/openblas_config.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
diff --git a/cmake/arch.cmake b/cmake/arch.cmake
index 69a117ca9..798a9ef82 100644
--- a/cmake/arch.cmake
+++ b/cmake/arch.cmake
@@ -35,12 +35,10 @@ endif ()
 if (USE_OPENMP)
   # USE_SIMPLE_THREADED_LEVEL3 = 1
   # NO_AFFINITY = 1
-  find_package(OpenMP)
+  find_package(OpenMP REQUIRED)
   if (OpenMP_FOUND)
     set(CCOMMON_OPT "${CCOMMON_OPT} ${OpenMP_C_FLAGS} -DUSE_OPENMP")
     set(FCOMMON_OPT "${FCOMMON_OPT} ${OpenMP_Fortran_FLAGS}")
-  elseif (UNIX)
-    set(USE_OPENMP 0)
   endif()
 endif ()
 
diff --git a/cmake/prebuild.cmake b/cmake/prebuild.cmake
index 3b8ab9be6..cc5475630 100644
--- a/cmake/prebuild.cmake
+++ b/cmake/prebuild.cmake
@@ -241,23 +241,4 @@ else(NOT CMAKE_CROSSCOMPILING)
 
   ParseGetArchVars(${GETARCH2_MAKE_OUT})
 
-  # compile get_config_h
-  set(GEN_CONFIG_H_DIR "${PROJECT_BINARY_DIR}/genconfig_h_build")
-  set(GEN_CONFIG_H_BIN "gen_config_h${CMAKE_EXECUTABLE_SUFFIX}")
-  set(GEN_CONFIG_H_FLAGS "-DVERSION=\"${OpenBLAS_VERSION}\"")
-  file(MAKE_DIRECTORY ${GEN_CONFIG_H_DIR})
-
-  if (NOT "${CMAKE_SYSTEM_NAME}" STREQUAL "WindowsStore")
-    try_compile(GEN_CONFIG_H_RESULT ${GEN_CONFIG_H_DIR}
-      SOURCES ${PROJECT_SOURCE_DIR}/gen_config_h.c
-      COMPILE_DEFINITIONS ${EXFLAGS} ${GETARCH_FLAGS} ${GEN_CONFIG_H_FLAGS} -I${PROJECT_SOURCE_DIR}
-      OUTPUT_VARIABLE GEN_CONFIG_H_LOG
-      COPY_FILE ${PROJECT_BINARY_DIR}/${GEN_CONFIG_H_BIN}
-    )
-
-    if (NOT ${GEN_CONFIG_H_RESULT})
-      MESSAGE(FATAL_ERROR "Compiling gen_config_h failed ${GEN_CONFIG_H_LOG}")
-    endif ()
-endif ()
-
 endif()