Using make subst

Shell Programming and Scripting
1

I have a string of source files

ENBL_PX11_LIBSRC = pltsub.f xpltlib.f xbuplot.c

I want to replace .f and .c with .o

to get

ENBL_PX11_LIBOBJ = pltsub.o xpltlib.o xbuplot.o

However I am having trouble doing this with subst.

2 
$ cat file
ENBL_PX11_LIBSRC = pltsub.f xpltlib.f xbuplot.c

$ sed 's/\.f/\.o/;s/\.c/\.o/' file
ENBL_PX11_LIBSRC = pltsub.o xpltlib.f xbuplot.o
3

The string is in a variable in a make file, I do not wish to read any file.

4

I dont see where is the problem. With the previous sed example you should be able to adapt it to your needs..

$ ENBL_PX11_LIBSRC="pltsub.f xpltlib.f xbuplot.c"

$ echo $ENBL_PX11_LIBSRC | sed 's/\.f/\.o/g;s/\.c/\.o/g'
pltsub.o xpltlib.o xbuplot.o
5

I see, like this it worked.

ENBL_PX11_LIBOBJ = `echo $(ENBL_PX11_LIBSRC) | sed 's/\.f/\.o/g; s/\.c/\.o/g'`

---------- Post updated at 12:45 PM ---------- Previous update was at 12:00 PM ----------

This is not working

ENBL_PX11_LIBOBJ = $(shell $(ECHO) $(ENBL_PX11_LIBSRC) | $(SED) 's/\.f/\.o/g; s/\.c/\.o/g')

---------- Post updated at 12:53 PM ---------- Previous update was at 12:45 PM ----------

[LEFT]I also tried this

ENBL_PX11_LIBOBJ = "$(shell $(ECHO) $(ENBL_PX11_LIBSRC) | $(SED) 's/\.f/\.o/g; s/\.c/\.o/g')"

[/LEFT]

6

This

sed 's/\.f/\.o/g;s/\.c/\.o/g'

can be shorten to

sed 's/\.[cf]/\.o/g'