On Mon, 2011-11-21 at 16:10 +0000, David Aldrich wrote:
> So I added the following code before the rules in my makefile:
>
> if test -d /usr/include/boost141; then \
> echo Using Boost 1.41 directory; \
> BOOST_INC := /usr/include/boost141; \
> BOOST_LIB := boost141/boost_python-mt; \
> else \
> echo Using default Boost location; \
> BOOST_INC := /usr/include/boost; \
> BOOST_LIB := boost_python-mt; \
> fi
>
> However, this code seems to do nothing. I get no messages from it on the
> console.
>
> Please will someone explain where I am going wrong?
You are trying to write shell syntax in a makefile. Makefiles must use
make syntax (except inside a recipe). Make doesn't have an "if"
statement, or a "test" command, or anything like that.
The text above is resolving into a variable assignment (!!):
if test -d /usr/[...]tory; BOOST_INC := /usr/include/boost141; [...]
which is why you're not getting an error. Believe it or not that's a
valid variable assignment statement in GNU make.
You'll want to do something like this instead:
ifneq (,$(wildcard /usr/include/boost141/.))
$(info Using Boost 1.41 directory)
BOOST_INC := /usr/include/boost141
BOOST_LIB := boost141/boost_python-mt
else
$(info Using default Boost location)
BOOST_INC := /usr/include/boost
BOOST_LIB := boost_python-mt
endif
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