somewhat autoconfig for makefiles

CMakeLists.txt

@@ -133,7 +133,6 @@ endif(CM_ALL_AUTO_DOC)
 
 
 # Export targets and create package
-
 install(EXPORT ALLTargets
     NAMESPACE ALL::
     FILE ALLTargets.cmake
@@ -154,5 +153,24 @@ install(FILES
     "${CMAKE_CURRENT_BINARY_DIR}/ALLConfigVersion.cmake"
     DESTINATION lib/cmake/ALL)
 
+# Create Makefile.libALL.in for inclusion in external Makefile projects
+# todo(s.schulz): The include directories and libraries should be auto
+# detected... but that is not easily done right now. Ideally, this should also
+# provide the very long VTK linker flags.
+set(ALL_MAKEFILE_INC ${CMAKE_CURRENT_BINARY_DIR}/Makefile.libALL.in)
+get_target_property(_liball_defines ALL INTERFACE_COMPILE_DEFINITIONS)
+list(TRANSFORM _liball_defines PREPEND " -D")
+list(JOIN _liball_defines " " _liball_defines_string)
+file(WRITE ${ALL_MAKEFILE_INC} "LIBALL_DEFINES := ${_liball_defines_string}\n")
+file(APPEND ${ALL_MAKEFILE_INC} "LIBALL_INCLUDE := -I\$(ALL_DIR)/include\n")
+file(APPEND ${ALL_MAKEFILE_INC} "LIBALL_LIB :=\n")
+if(CM_ALL_FORTRAN)
+    file(APPEND ${ALL_MAKEFILE_INC} "LIBALL_LIB += \$(ALL_DIR)/lib/libALL_fortran.a \$(ALL_DIR)/lib/libALL.a -lstdc++\n")
+    file(APPEND ${ALL_MAKEFILE_INC} "LIBALL_INCLUDE += -I\$(ALL_DIR)/include/modules\n")
+endif()
+if(CM_ALL_VORONOI)
+    file(APPEND ${ALL_MAKEFILE_INC} "LIBALL_LIB += \$(ALL_DIR)/lib/libvoro.a\n")
+endif()
+install(FILES ${ALL_MAKEFILE_INC} DESTINATION lib/make)
 
 # vim: sw=4 ts=4 et

example/MakefileProject/Makefile

@@ -19,18 +19,20 @@ MFC=mpifort
 ALL_DIR=all_bin
 VTK_DIR=vtk_bin
 
+# Source tree and temporary build directory
 ALL_BUILD=all_build
 ALL_SOURCE=all
 ALL_SOURCE=../..
 
-LIBALL_INCLUDE := -I$(ALL_DIR)/include/modules -I$(ALL_DIR)/include
-LIBALL_LIB := $(ALL_DIR)/lib/libALL_fortran.a $(ALL_DIR)/lib/libALL.a
-LIBALL_LIB += $(ALL_DIR)/lib/libvoro.a
-LIBALL_CONFIG_FILE := $(ALL_DIR)/lib/cmake/ALL/ALLConfig.cmake
-LIBALL_DEFINES += -DALL_VTK_OUTPUT -DALL_VORONOI_ACTIVE
-
+# Which features should be enabled for ALL
 LIBALL_CONFIGURE := -DCM_ALL_FORTRAN=ON -DCM_ALL_VORONOI=ON -DCM_ALL_VTK_OUTPUT=ON -DCMAKE_BUILD_TYPE=Release
 
+
+LIBALL_CONFIG_FILE := $(ALL_DIR)/lib/make/Makefile.libALL.in
+# This will provide the variables LIBALL_DEFINES, LIBALL_INCLUDE and
+# LIBALL_LIB, which need to be passed to the compiler and linker.
+-include $(LIBALL_CONFIG_FILE)
+
 # Since gfortran does not link the standard C++ library by default, we need to
 # explicitly state it.
 FFLAGS += -lstdc++