On Tue, Nov 7, 2017 at 9:48 AM, Zack Vitoh <[email protected]> wrote:
> Hi, I am new to libmesh, and have installed it to > $HOME/src/libmesh/build/ > > I am trying the simplest thing I can think of: copy the source for > introduction_ex1.C into a 'myexamples' subdirectory of > $HOME/src/libmesh/build and create a simple, comprehensible makefile to run > the code. > > Do I simply copy and modify the makefile.in from the original example like > so? > > example_name = introduction_ex1 > > install_dir = $HOME/src/libmesh/build/myexamples/introduction/ex1 > data = introduction_ex1.C run.sh > sources = $(data) run.sh > > check_SCRIPTS = run.sh > CLEANFILES = output.xda output.xdr > > > ############################################## > # include common example environment > include $(top_srcdir)/examples/Make.common > > PS: I do not understand automake, and so do not understand the 1200 lines > of the makefile.am in the original example, but I sense that I should not > try to modify this since it is generated by automake > My advice is actually to not try and copy an example when getting started since, as you have seen, the automake system is difficult to work with. After "make install" into $LIBMESH_DIR, I'd create your new application in a different directory (not in the libmesh source tree or installation directory) and use a human readable Makefile like the one below. Put your main program in a file called "foo.cc" and then simply run "make". Let us know if you run into issues... -- John # This Makefile assumes you have libmesh built and installed in $LIBMESH_DIR. # If the user has no environment variable # called METHOD, he gets optimized mode. ifeq (x$(METHOD),x) METHOD := opt endif # installed libmesh location of libmesh-config script libmesh_config := $(LIBMESH_DIR)/bin/libmesh-config # Use the libmesh-config script to determine the usual make variables. # Note: passing $METHOD along to the libmesh-config script handles the # case where METHOD is not set and the user does # make METHOD=dbg foo # since in this case, METHOD is never set in the environment and thus # never passed to libmesh-config correctly. libmesh_CXX := $(shell METHOD=$(METHOD) $(libmesh_config) --cxx) libmesh_INCLUDE := $(shell METHOD=$(METHOD) $(libmesh_config) --include) libmesh_CPPFLAGS := $(shell METHOD=$(METHOD) $(libmesh_config) --cppflags) libmesh_CXXFLAGS := $(shell METHOD=$(METHOD) $(libmesh_config) --cxxflags) libmesh_LIBS := $(shell METHOD=$(METHOD) $(libmesh_config) --libs) # File management variables. headers := $(wildcard *.h) srcs := $(wildcard *.C) # Note: spaces are treated as literal characters in patsubst commands! objs := $(patsubst %.C,%-$(METHOD).o,$(srcs)) deps := $(patsubst %.C,%-$(METHOD).d,$(srcs)) mainfile := $(wildcard *.cc) mainexe := $(patsubst %.cc,%-$(METHOD),$(mainfile)) maindep := $(patsubst %.cc,%.d,$(mainfile)) .PHONY: clean # Disable make builtin rules for compiling .C files into objects # https://stackoverflow.com/questions/4122831/disable-make-builtin-rules-and-variables-from-inside-the-make-file .SUFFIXES: # .SECONDARY with no prerequisites causes all targets to be treated as # secondary (i.e., no target is removed because it is considered # intermediate). .SECONDARY: all: $(mainexe) # Generate object files. %-$(METHOD).o: %.C @echo "Compiling" $< @$(libmesh_CXX) -MMD -MP -MT $@ $(libmesh_INCLUDE) $(libmesh_CPPFLAGS) $(libmesh_CXXFLAGS) -c $< -o $@ # How to build executables. If you have a source file called foo.cc, # type 'make foo' to build an executable from it. %-$(METHOD): %.cc $(objs) @echo "Compiling" $< @$(libmesh_CXX) -MMD -MP -MT $@ -MF $(maindep) $(libmesh_INCLUDE) $(libmesh_CPPFLAGS) $(libmesh_CXXFLAGS) $< -o $@ $(libmesh_LIBS) $(libmesh_LDFLAGS) $(EXTERNAL_FLAGS) $(objs) echo: @echo "$(srcs)" @echo "$(objs)" @echo "$(deps)" @echo "$(maindeps)" # File management rules. clean: rm -f *~ $(mainexe) $(objs) $(deps) $(maindep) # Include all the .d files generated by the compiler, but don't error # if the files don't exist yet. -include $(deps) -include $(maindep) ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
