[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: GNU Make - Problem defining pattern rules
From: |
Henrik Carlqvist |
Subject: |
Re: GNU Make - Problem defining pattern rules |
Date: |
Thu, 29 Apr 2010 08:31:25 +0200 |
User-agent: |
Pan/0.14.2 (This is not a psychotic episode. It's a cleansing moment of clarity.) |
Dave <davej2000@gmail.com> wrote:
> When I execute:
> make src/application/SampleApplication
>
> I see "Building a Binary"
>
> When I execute
> make src/libraries/PluginOne/libPluginOne.so
>
> I see "make: Nothing to be done for `src/libraries/PluginOne/
> libPluginOne.so'."
>
> Can anyone explain why the pattern rule for the binary appears to work,
> but the pattern rule for a .so library doesn't?
The "Nothing to be done..." message means that gnu makes considers the
target to already be up to date. This means in your case that
src/libraries/PluginOne/libPluginOne.so already exists and is newer than
src/libraries/PluginOne/libPluginOne.o. It also means that
src/libraries/PluginOne/libPluginOne.o is newer than any of its
prerequisites.
> ----------------------------------------------------------
> # Some Pattern Rules
> #
> %.o: %.cpp
> @echo "Building Object Files"
>
> %.so: %.o
> @echo "Building a Library"
>
> %: %.o
> @echo "Building a Binary"
regards Henrik
--
The address in the header is only to prevent spam. My real address is:
hc3(at)poolhem.se Examples of addresses which go to spammers:
root@localhost postmaster@localhost