diff options
| -rwxr-xr-x | emcc | 19 |
1 files changed, 16 insertions, 3 deletions
@@ -127,7 +127,11 @@ Most normal gcc/g++ options will work, for example: --version Display compiler version information Options that are modified or new in %s include: - -O0 No optimizations (default) + + -O0 No optimizations (default). This is the recommended + setting for starting to port a project, as it + includes various assertions. + -O1 Simple optimizations, including asm.js, LLVM -O1 optimizations, relooping, and no runtime assertions or C++ exception catching (to re-enable @@ -136,11 +140,20 @@ Options that are modified or new in %s include: -s ALIASING_FUNCTION_POINTERS=1 - (For details on the affects of different + This is the recommended setting when you want a + reasonably optimized build that is generated as + quickly as possible (it is much faster than -O2). + + (Note: for details on the affects of different opt levels, see apply_opt_level() in tools/shared.py and also src/settings.js.) + -O2 As -O1, plus various js-level optimizations and - LLVM -O3 optimizations + LLVM -O3 optimizations. This is the recommended + setting for a release build: slower compilation + time in return for the smallest and fastest + output. + -O3 As -O2, plus dangerous optimizations that may break the generated code! This adds |