Allow setting arch to conan_cmake_settings

[bc-lee]

Fixes: #68

[memsharded]

Is this a duplicate of #69?

[bc-lee]

No, it was my mistake and a modified commit has been added to this pull request.

[memsharded]

Looks good, but I think this might deserve to add a test. Could you please try to add one? Thanks!

[bc-lee]

Seems like the package Hello/0.1@memsharded/testing that is used in tests are not elegible to build 32bit-binaries in 64bit Linux..

A quick and dirty solution for patching conanfile.py using AutoToolsBuildEnvironment is follows:

diff --git a/conanfile.py b/conanfile.py
index 3a45fc4..693b309 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -1,4 +1,4 @@
-from conans import ConanFile, CMake
+from conans import ConanFile, CMake, AutoToolsBuildEnvironment, tools
    
 class HelloConan(ConanFile):
     name = "Hello"
@@ -11,9 +11,11 @@ class HelloConan(ConanFile):
         self.run("git clone https://github.com/memsharded/hello.git")
 
     def build(self):
-        cmake = CMake(self)
-        self.run('cd hello && cmake . %s' % cmake.command_line)
-        self.run("cd hello && cmake --build . %s" % cmake.build_config)
+        autotools = AutoToolsBuildEnvironment(self)
+        with tools.environment_append(autotools.vars):
+            cmake = CMake(self)
+            self.run('cd hello && cmake . %s' % cmake.command_line)
+            self.run("cd hello && cmake --build . %s" % cmake.build_config)
 
     def package(self):
         self.copy("*.h", dst="include", src="hello")

[memsharded]

Thanks for contributing this!
I will try to add a conditional test or something for the next release.