Steps to configure built artifacts

[Ottunger]

Hello,

I'm trying to understand if there's a way to configure what is being built by sw, in order to miniize size of generated artifacts. From https://software-network.org/client/sw.pdf , I can see that you have taken at CPPAN the zero-conf and "all or nothing" route, so maybe it's just not designed for this.

I tried in my sw.cpp to undefined some variables that would typically be configured by a configure script, but it doesn't seem to make any difference:

    auto &ocr = s.addLibrary("xxx");
    {
        auto &t = ocr;
        t += cppstd;
        t += "OCR_API"_api;
        t +=
           //
            ;
        t += "org.sw.demo.intel.opencv.imgcodecs-4.11.0"_dep;
        t += "org.sw.demo.intel.opencv.imgproc-4.11.0"_dep;
        t += "org.sw.demo.google.tesseract.libtesseract-5.4.0"_dep;
        t.CompileOptions.erase("-DHAVE_CURL");
        t.CompileOptions.erase("-DHAVE_LIBCURL");
        t.CompileOptions.erase("-DFRMT_derived");
        t.CompileOptions.erase("-DFRMT_gtiff");
        t.CompileOptions.erase("-DFRMT_hfa");
        t.CompileOptions.erase("-DFRMT_libgeotiff");
        t.CompileOptions.erase("-DFRMT_vrt");
        t.CompileOptions.erase("-DUSE_NGHTTP2");
        t.CompileOptions.push_back("-fdeclspec");
        t.CompileOptions.push_back("-O2");
    }

Do you know how I can replicate for instance the result of applying --with-curl=no of a configure script to a sw build?

[egorpugin]

Hi,

There is possible way: sw build -Dvarname=value https://github.com/SoftwareNetwork/sw/blob/b0.4.5/sw.cpp#L392

To minimize size of binaries:

1. Add options as you do (won't affect deps though).
2. Try to build minimum size release config sw build -config msr

Upd.: It may be not very convenient at the moment, but should be improved in the future sw2.

[Ottunger]

Thanks for the update!

So if I understand correctly, I can use the variables passed from sw build -D to make conditional changes to builds in sw.cpp, however the "best I can do" is define variables for compilers (via CompileOptions.push_back)?

In that case I'll try the release config and call it an upgrade for sw2!

[egorpugin]

--with-curl=no

And if you want to exclude something, it is only possible if supported by underlying script with those conditions.

---

Also it is not possible to affect predefined config options at the moment (like removing flags). But I have this in mind for the future version.