Provide a make target for libraries

[zostay]

I am compelled to make this suggestion by the homebrew team as part of my attempt to add a linenoise formula there. To make linenoise install as a library on OS X, the following patch is required to the Makefile:

+--- a/Makefile
++++ b/Makefile
+@@ -1,7 +1,15 @@
++all: liblinenoise.dylib linenoise_example
++
++liblinenoise.dylib: linenoise.o
++  $(CC) -dynamiclib -o liblinenoise.dylib linenoise.o
++
++%.o: %.c
++  $(CC) $(CFLAGS) -o $@ -c $<
++
+ linenoise_example: linenoise.h linenoise.c
+
+ linenoise_example: linenoise.c example.c
+   $(CC) -Wall -W -Os -g -o linenoise_example linenoise.c example.c
+
+ clean:
+-  rm -f linenoise_example
++  rm -f linenoise_example liblinenoise.dylib

Something like this would be handy for packaging systems wishing to install linenoise as a dynamic library and is further handy to bindings in languages like Perl 6 which work best with dynamic libraries. Obviously, this patch is not useful in a general way as it only works on OS X.

[labster]

👍