diff options
| -rw-r--r-- | src/jsifier.js | 3 | ||||
| -rw-r--r-- | src/settings.js | 8 | ||||
| -rwxr-xr-x | tests/runner.py | 19 |
3 files changed, 30 insertions, 0 deletions
diff --git a/src/jsifier.js b/src/jsifier.js index 6cbe8b88..b3c2af1d 100644 --- a/src/jsifier.js +++ b/src/jsifier.js @@ -453,6 +453,9 @@ function JSify(data, functionsOnly, givenFunctions) { item.JS = addFromLibrary(shortident); } else { item.JS = 'var ' + item.ident + '; // stub for ' + item.ident; + if (WARN_ON_UNDEFINED_SYMBOLS) { + warn('Unresolved symbol: ' + item.ident); + } } return ret; } diff --git a/src/settings.js b/src/settings.js index 1910e943..e0286213 100644 --- a/src/settings.js +++ b/src/settings.js @@ -218,6 +218,14 @@ var FAKE_X86_FP80 = 1; // Replaces x86_fp80 with double. This loses precision. I var GC_SUPPORT = 1; // Enables GC, see gc.h (this does not add overhead, so it is on by default) +var WARN_ON_UNDEFINED_SYMBOLS = 0; // If set to 1, we will warn on any undefined symbols that + // are not resolved by the library_*.js files. We by default + // do not warn because (1) it is normal in large projects to + // not implement everything, when you know what is not + // going to actually be called (and don't want to mess with + // the existing buildsystem), and (2) functions might be + // implemented later on, say in --pre-js + // Compiler debugging options var DEBUG_TAGS_SHOWING = []; // Some useful items: diff --git a/tests/runner.py b/tests/runner.py index c17b1a0a..6991735e 100755 --- a/tests/runner.py +++ b/tests/runner.py @@ -6786,6 +6786,25 @@ f.close() Popen(['python', EMCC, os.path.join(self.get_dir(), 'main.cpp')]).communicate() self.assertContained('1234, 1234, 4321\n', run_js(os.path.join(self.get_dir(), 'a.out.js'))) + def test_warn_undefined(self): + open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r''' + #include <stdio.h> + + extern "C" { + void something(); + } + + int main() { + something(); + return 0; + } + ''') + output = Popen(['python', EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-s', 'WARN_ON_UNDEFINED_SYMBOLS=1'], stderr=PIPE).communicate() + self.assertContained('Unresolved symbol: _something\n', output[1]) + + output = Popen(['python', EMCC, os.path.join(self.get_dir(), 'main.cpp')], stderr=PIPE).communicate() + self.assertNotContained('Unresolved symbol: _something\n', output[1]) + def test_prepost(self): open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(''' #include <stdio.h> |