Comment #1 on issue 556 by [email protected]: Unable to cross-compile for
i686-w64-mingw32 with Cygwin
http://code.google.com/p/protobuf/issues/detail?id=556
Hi,
Nick is cross compiling on Cygwin for mingw. The problem is that the build
calls the just built protoc, this is taboo in cross compile mode. From what
I understand protoc is also a tool that is installed. What needs to be done
is the following:
1. If cross compiling, ensure user has already a native version installed.
Do this by:
2. Add AC_CHECK_PROG to configure.ac to find whatever build time required
tools, abort if it is not found when $build != $host.
4. Optionally, check the version of installed protoc and other tools when
cross compiling, abort as necessary.
3. Set PROTOC variable to the path of installed and working protoc/tools if
in cross compile mode, else use the usual just-built "$oldpwd/protoc". Do
this for other tools as well.
4. Modify Makefile.am as necessary to call through the new variables.
Changes in documentation:
1. Require user to already have an installed version if cross compiling.
2. Optionally require user to have the same version when cross compiling.
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