Feature: Add "configure" helper available in build about conan HOT 6 CLOSED

I'd say that a dict is a little more pythonic and readable:

env["LIBS"] = " ".join(...)
env["OTHER_ENV_VAR"] = "my_var_value"

Not sure about the multiplatform approach, does even the "env" command works in win? If not, what would be the approach. Also it is important to define the scope, I guess that they are just per-command, so if using some other approach in win, make sure that it restores the env to its previous state.

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Forget win. I'm talking about classic configure and make.
Dict? Restore env???? What?? I suggest just a helper to create the universal flags in unix like configures . That code is what I'm using in every single conanfile that uses configure for linux and mac. My feature request is reuse the function code. I don't get what should be more pythonic or why it should be a dict.

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Ok, I misunderstood the scope of the issue. I'd create a Env helper, similar to the CMake one, that receives a deps_cpp_info object in its constructor.

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For windows support maybe:

https://msdn.microsoft.com/en-us/library/6y6t9esh(v=vs.110).aspx

Variables should be used like this:

headers_paths = ";".join(['"%s"' % lib for lib in self.deps_cpp_info.include_paths])
lib_paths= ";".join(['"%s"' % lib for lib in self.deps_cpp_info.lib_paths])

command = "set PATH=%%PATH%%;%s && set LIB=%%LIB%%;%s && COMPILE COMMANDS"

I'm trying right now in windows.

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Finally it seems to work:

def generic_env_configure_vars(self):
    """Reusable in any lib with configure!!"""
    if self.settings.os == "Linux" or self.settings.os == "Macos":
        libs = 'LIBS="%s"' % " ".join(["-l%s" % lib for lib in self.deps_cpp_info.libs])
        ldflags = 'LDFLAGS="%s"' % " ".join(["-L%s" % lib for lib in self.deps_cpp_info.lib_paths]) 
        archflag = "-m32" if self.settings.arch == "x86" else ""
        cflags = 'CFLAGS="%s %s"' % (archflag, " ".join(self.deps_cpp_info.cflags))
        cpp_flags = 'CPPFLAGS="%s %s"' % (archflag, " ".join(self.deps_cpp_info.cppflags))
        command = "env %s %s %s %s" % (libs, ldflags, cflags, cpp_flags)
    elif self.settings.os == "Windows" and self.settings.compiler == "Visual Studio":
        cl_args = " ".join(['/I"%s"' % lib for lib in self.deps_cpp_info.include_paths])
        lib_paths= ";".join(['"%s"' % lib for lib in self.deps_cpp_info.lib_paths])
        command = "SET LIB=%s;%%LIB%% && SET CL=%s" % (lib_paths, cl_args)

Maybe are missing link and compiler options, but I hadn't and I couldn´t test them.

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ConfigureEnvironment(deps_cpp_info)

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