Allow to install the 'interfare64' version concurrently with the regular version

CMakeLists.txt

@@ -15,8 +15,6 @@ include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
 
 
-set(OpenBLAS_LIBNAME openblas)
-
 #######
 if(MSVC)
 option(BUILD_WITHOUT_LAPACK "Without LAPACK and LAPACKE (Only BLAS or CBLAS)" ON)
@@ -43,6 +41,8 @@ message(WARNING "CMake support is experimental. This will not produce the same M
 include("${PROJECT_SOURCE_DIR}/cmake/utils.cmake")
 include("${PROJECT_SOURCE_DIR}/cmake/system.cmake")
 
+set(OpenBLAS_LIBNAME openblas${SUFFIX64_UNDERSCORE})
+
 set(BLASDIRS interface driver/level2 driver/level3 driver/others)
 
 if (NOT DYNAMIC_ARCH)
@@ -214,11 +214,15 @@ set_target_properties(${OpenBLAS_LIBNAME} PROPERTIES
 
 # Install libraries
 install(TARGETS ${OpenBLAS_LIBNAME}
-	EXPORT "OpenBLASTargets"
+	EXPORT "OpenBLAS${SUFFIX64}Targets"
 	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
 
+# Install headers
+set(CMAKE_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR}/openblas${SUFFIX64})
+set(CMAKE_INSTALL_FULL_INCLUDEDIR ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR})
+
 message(STATUS "Generating openblas_config.h in ${CMAKE_INSTALL_INCLUDEDIR}")
 
 set(OPENBLAS_CONFIG_H ${CMAKE_BINARY_DIR}/openblas_config.h)
@@ -266,29 +270,31 @@ if(NOT NO_LAPACKE)
 	ADD_CUSTOM_TARGET(genlapacke
 	COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/lapack-netlib/LAPACKE/include/lapacke_mangling_with_flags.h.in "${CMAKE_BINARY_DIR}/lapacke_mangling.h"
 	)
-	install (FILES ${CMAKE_BINARY_DIR}/lapacke_mangling.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+	install (FILES ${CMAKE_BINARY_DIR}/lapacke_mangling.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/openblas${SUFFIX64})
 endif()
 
 include(FindPkgConfig QUIET)
 if(PKG_CONFIG_FOUND)
-	configure_file(${PROJECT_SOURCE_DIR}/cmake/openblas.pc.in ${PROJECT_BINARY_DIR}/openblas.pc @ONLY)
-	install (FILES ${PROJECT_BINARY_DIR}/openblas.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig/)
+	configure_file(${PROJECT_SOURCE_DIR}/cmake/openblas.pc.in ${PROJECT_BINARY_DIR}/openblas${SUFFIX64}.pc @ONLY)
+	install (FILES ${PROJECT_BINARY_DIR}/openblas${SUFFIX64}.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig/)
 endif()
 
 
 # GNUInstallDirs "DATADIR" wrong here; CMake search path wants "share".
 set(PN OpenBLAS)
-set(CMAKECONFIG_INSTALL_DIR "share/cmake/${PN}")
+set(CMAKECONFIG_INSTALL_DIR "share/cmake/${PN}${SUFFIX64}")
 configure_package_config_file(cmake/${PN}Config.cmake.in
-                              "${CMAKE_CURRENT_BINARY_DIR}/${PN}Config.cmake"
+                              "${CMAKE_CURRENT_BINARY_DIR}/${PN}${SUFFIX64}Config.cmake"
                               INSTALL_DESTINATION ${CMAKECONFIG_INSTALL_DIR})
 write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${PN}ConfigVersion.cmake
                                  VERSION ${${PN}_VERSION}
                                  COMPATIBILITY AnyNewerVersion)
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PN}Config.cmake
-              ${CMAKE_CURRENT_BINARY_DIR}/${PN}ConfigVersion.cmake
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PN}${SUFFIX64}Config.cmake
+        DESTINATION ${CMAKECONFIG_INSTALL_DIR})
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PN}ConfigVersion.cmake
+        RENAME ${PN}${SUFFIX64}ConfigVersion.cmake
         DESTINATION ${CMAKECONFIG_INSTALL_DIR})
-install(EXPORT "${PN}Targets"
-        NAMESPACE "${PN}::"
+install(EXPORT "${PN}${SUFFIX64}Targets"
+        NAMESPACE "${PN}${SUFFIX64}::"
         DESTINATION ${CMAKECONFIG_INSTALL_DIR})
 

cmake/fc.cmake

@@ -3,6 +3,11 @@
 ## Description: Ported from portion of OpenBLAS/Makefile.system
 ##              Sets Fortran related variables.
 
+if (INTERFACE64)
+  set(SUFFIX64 64)
+  set(SUFFIX64_UNDERSCORE _64)
+endif()
+
 if (${F_COMPILER} STREQUAL "FLANG")
   set(CCOMMON_OPT "${CCOMMON_OPT} -DF_INTERFACE_FLANG")
   if (BINARY64 AND INTERFACE64)

cmake/openblas.pc.in

@@ -1,4 +1,5 @@
 libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+libsuffix=@SUFFIX64_UNDERSCORE@
 includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
 
 openblas_config=USE_64BITINT=@USE_64BITINT@ NO_CBLAS=@NO_CBLAS@ NO_LAPACK=@NO_LAPACK@ NO_LAPACKE=@NO_LAPACKE@ DYNAMIC_ARCH=@DYNAMIC_ARCH@ DYNAMIC_OLDER=@DYNAMIC_OLDER@ NO_AFFINITY=@NO_AFFINITY@ USE_OPENMP=@USE_OPENMP@ @CORE@ MAX_THREADS=@NUM_THREADS@ 
@@ -6,5 +7,5 @@ Name: OpenBLAS
 Description: OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version
 Version: @OPENBLAS_VERSION@
 URL: https://github.com/xianyi/OpenBLAS
-Libs: -L${libdir} -lopenblas
+Libs: -L${libdir} -lopenblas${libsuffix}
 Cflags: -I${includedir}