I was specifically asking for inability to run compiled tests with
EMCONFIGURE_JS=2 so that Autoconf ./configure will assume that it is
cross compiling. I'm not sure that this change is supposed to do that.
It seems like
https://github.com/kripken/emscripten/commit/3702801d1fddc80d2a058507b953ede9dff09b11
simply always compiles to JS even if that would fail to run properly.
The "checking whether we are cross compiling" test must fail to run the
compiled binary in order for Autoconf ./configure to assume that it is
cross compiling. If that binary runs but later tests fail to run
properly, then test results may be bad, for example outputting empty
defines like this:
#define SIZEOF_UNSIGNED_CHAR
#define SIZEOF_UNSIGNED_SHORT
#define SIZEOF_UNSIGNED_INT
#define SIZEOF_UNSIGNED_LONG
#define SIZEOF_UNSIGNED_LONG_LONG
#define SIZEOF_INT_P
Surprisingly, I got the results I desire. The cross compiling test
binary failed to execute with "./configure: ./conftest: /usr/bin/node:
bad interpreter: No such file or directory" because it was looking for
/usr/bin/node and there was only /usr/local/bin/node. Then Bochs 2.6.7
proceeded to configure and build without any ./configure hacks being
needed. Impressive! However, if I create a /usr/bin/node symlink, I
can't make ./configure conclude that it is cross compiling.
I guess tests compiled to JS couldn't be run with EMCONFIGURE_JS=1
either, but most tests were being compiled to native code, so this
wasn't causing problems. I see only one Bochs test triggering the error
with EMCONFIGURE_JS=1: "checking for ANSI C header files".
BTW. Failure to run compiled C programs can cause an error like this:
checking whether we are cross compiling... configure: error: in
`/home/bgjenero/projects/bochs/bochs-2.6.7':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details
ERROR root: Configure step failed with non-zero return code 1!
Command line: ['./configure', '--without-x', '--with-sdl2',
'--disable-show-ips', '--enable-fast-function-calls',
'--enable-handlers-chaining'] at /home/bgjenero/projects/bochs/bochs-2.6.7
The solution to that error is simple and self-explanatory. I added
--host=le32-unknown-nacl because --host=asmjs-unknown-emscripten isn't
recognized.
On 2015-02-23 07:51 PM, Alon Zakai wrote:
Nice idea, added.
- Alon
On Wed, Feb 18, 2015 at 11:42 AM, Boris Gjenero <[email protected]
<mailto:[email protected]>> wrote:
What about ability to compile all tests to JS without ability to run
compiled code? Projects which are properly set up with Autoconf in a
way that enables cross-compiling should configure successfully that
way. It could be enabled with something like "EMCONFIGURE_JS=2".
On Tuesday, 17 February 2015 14:59:15 UTC-5, Alon Zakai wrote:
I see. So if those tests printed instead of writing to a file, I
guess this would work. Still would be nice to have this work out
of the box.
We could try to get fprintf to work in node by writing directly
to the files synchronously. But we don't currently have support
for mounting the entire filesystem as NODEFS, it is tricky due
to devices, see
https://github.com/kripken/__emscripten/pull/3152
<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2Fkripken%2Femscripten%2Fpull%2F3152&sa=D&sntz=1&usg=AFQjCNFOZkbhLTUYLxBJ2DgWy2fgyYMSXg>
. However, perhaps we should support an option to mount it,
ignoring devices, just for this purpose?
- Alon
--
You received this message because you are subscribed to the Google
Groups "emscripten-discuss" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to [email protected]
<mailto:[email protected]>.
For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to a topic in the
Google Groups "emscripten-discuss" group.
To unsubscribe from this topic, visit
https://groups.google.com/d/topic/emscripten-discuss/zLMDkPUmZIQ/unsubscribe.
To unsubscribe from this group and all its topics, send an email to
[email protected]
<mailto:[email protected]>.
For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google Groups
"emscripten-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
