Example Demonstrates Using Paths in NMAKE (60340)

MORE INFORMATION

The makefile compares the modification dates of the header (.H) and source code (.C) files with the object (.OBJ) files and the dates of the object files with the executable (.EXE) file. If any of the dependent files changed more recently than the target file changed, NMAKE executes the specified commands. The dates of the header and source code files in the WORK directory are compared to the dates of the object files in the LIB directory.

If any of the source files changed since its associated object file was created, NMAKE calls the compiler to create the object file and copies it from the current directory to the LIB directory. Then NMAKE compares the dates of the object files in the LIB directory with the date of the executable file in the current directory. If any of the object files changed since the executable file was created, NMAKE calls LINK to rebuild the executable file.

The following makefile example uses several predefined macro modifiers. For more information on the macro modifiers, please refer to the macro section of the NMAKE documentation provided with your compiler.

If none of the object files exist, NMAKE executes the following commands when it runs this makefile:

 cl /c c:\work\test1.c
   copy test1.obj c:\lib\test1.obj
      1 file(s) copied
   erase test1.obj

   cl /c c:\work\test2.c
   copy test2.obj c:\lib\test2.obj
      1 file(s) copied
   erase test2.obj

   cl /c c:\work\test3.c
   copy test3.obj c:\lib\test3.obj
      1 file(s) copied
   erase test3.obj

   link c:\lib\test1 c:\lib\test2 c:\lib\test3;

				

Sample Makefile

# macros

objdir = c:\lib
wrkdir = c:\work
list   = $(objdir)\test1.obj $(objdir)\test2.obj $(objdir)\test3.obj

# inference rules

# compile
# $< represents the dependent file.
# $(*F) represents the targets base name.
# $(*R) represents the targets base name and directory.

{$(wrkdir)}.c{$(objdir)}.obj:
   cl /c $<
   copy $(*F).obj $(*R).obj
   erase $(*F).obj

# link
# $(**R) represents all the dependents including directories.

{$(objdir)}.obj{}.exe:
   link $(**R);

# target-dependencies
# $$(@B) represents the base name of the current target.

test1.exe : $(list)

$(objdir)\*.obj : $(wrkdir)\$$(@B).c $(wrkdir)\test1.h $(wrkdir)\test2.h