Makefile中的条件:丢失分隔符错误？

Question

我想按照http://sunsite.ualberta.ca/Documentation/Gnu/make-3.79/html_chapter/make_7.html#SEC72上的指南在Makefile中编写一些条件.但是,我得到错误Makefile:219: *** missing separator. Stop.,其中第219行是ifeq语句的行.这三条线以-$(FC)标签开头.

我正在使用GNU Make 3.81.任何帮助是极大的赞赏!

[...]

mod: $(MODBIN)

$(MODBIN): $(MODSRC)
ifeq($(FC),gfortran)
    -$(FC) $(MODFLAGS) -J$(INCPATH) $(INCLUDE) -c -o $@ $(subst $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
else ifeq($(FC),ifort)
    -$(FC) $(MODFLAGS) -module $(INCPATH) $(INCLUDE) -c -o $@ $(subst $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
else ifeq ($(FC),xlf2003_r)
    -$(FC) $(MODFLAGS) -qmoddir=$(INCPATH) $(INCLUDE) -c -o $@ $(subst $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
endif

io: $(IOBIN)

[...]

编辑:按照@ sagar-sakre的建议,我改为:

[...]
mod: $(MODBIN)

$(MODBIN): $(MODSRC)
    ifeq($(B3dC),gfortran)
    -$(FC) $(MODFLAGS) -J$(INCPATH) $(INCLUDE) -c -o $@ $(subst $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
    else ifeq($(B3dC),ifort)
    -$(FC) $(MODFLAGS) -module $(INCPATH) $(INCLUDE) -c -o $@ $(subst $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
    else ifeq ($(B3dC),xlf2003_r)
    -$(FC) $(MODFLAGS) -qmoddir=$(INCPATH) $(INCLUDE) -c -o $@ $(subst $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
    endif endif endif

io: $(IOBIN)
[...]

但是,现在我收到此错误:

ifeq(xlf,gfortran)
/bin/sh: -c: line 0: syntax error near unexpected token `xlf,gfortran'
/bin/sh: -c: line 0: `ifeq(xlf,gfortran)'
make: *** [build/basic.o] Error 2

所以这里仍有问题......

Answer 1

在ifeq之后应该有一个[空格]

mod: $(MODBIN)
$(MODBIN): $(MODSRC)
ifeq ($(FC),gfortran)
    -$(FC) $(MODFLAGS) -J$(INCPATH) $(INCLUDE) -c -o $@ $(subst
    $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
else ifeq ($(FC),ifort)
    -$(FC) $(MODFLAGS) -module $(INCPATH) $(INCLUDE) -c -o $@ $(subst
    $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
else ifeq ($(FC),xlf2003_r)
     -$(FC) $(MODFLAGS) -qmoddir=$(INCPATH) $(INCLUDE) -c -o $@ $(subst 
     $(BUILDPATH),$(MODPATH),$*).f90 $(NETCDFLDFLAGS)
endif

一般Makefile会

target:dependencies
ifeq ( parm1, parm2)
 [TAB]   operation
else
 [TAB]   operation
endif