Difference between revisions of "Using C libraries for a D program"

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(note binding file is not provided here as precompiled)
(make shared explicit; use vars to make more general)
Line 6: Line 6:
 
::'''./main.d'''
 
::'''./main.d'''
  
* a C ABI library file:  
+
* a C ABI shared library file:  
 
::'''/usr/local/lib/libbu.so'''
 
::'''/usr/local/lib/libbu.so'''
  
Line 23: Line 23:
 
BINDING = $(MODDIR)/bu.d
 
BINDING = $(MODDIR)/bu.d
  
all: test-bu
+
PROG = $(PROG)
  
test-bu: main.o bu.o
+
all: $(PROG)
 +
 
 +
$(PROG): main.o bu.o
 
         $(DMD) -o $@ main.o bu.o -L$(LIBDIR) -lbu
 
         $(DMD) -o $@ main.o bu.o -L$(LIBDIR) -lbu
 
   
 
   
Line 35: Line 37:
  
 
clean:
 
clean:
         -rm *.o</pre>
+
         -rm $(PROG) *.o</pre>
  
 
Then we can build '''test-bu''' by executing:
 
Then we can build '''test-bu''' by executing:

Revision as of 18:41, 15 May 2014

WARNING: This crude recipe by an absolute D newbie has not yet been tested--corrections are welcome!

Assume one has the following, error-free files:

  • a D language source program:
./main.d
  • a C ABI shared library file:
/usr/local/lib/libbu.so
  • a D language binding source file to the C library API headers:
/usr/local/include/bu.d

We first create a GNU Makefile to build program test-bu using those three files (note the leading spaces on lines following targets must be tabs in a real GNU Makefile):

$ cat Makefile
# use the dmd compiler
DMD = /usr/bin/dmd

LIBDIR = /usr/local/brlcad/lib
MODDIR = /usr/local/brlcad/include

BINDING = $(MODDIR)/bu.d

PROG = $(PROG)

all: $(PROG)

$(PROG): main.o bu.o
        $(DMD) -o $@ main.o bu.o -L$(LIBDIR) -lbu
 
%.o: %.d
        $(DMD) -c $< -o $@

bu.o: $(BINDING)
        $(DMD) -c $< -o $@

clean:
        -rm $(PROG) *.o

Then we can build test-bu by executing:

$ make test-bu

The GNU Makefile can be made more general and efficient, but it should produce the desired binary program.

Note also that a fully D-supporting C library installation would probably have the D binding source available as a pre-compiled *.o file.