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| -rw-r--r-- | CONTRIBUTING.md | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md index 6bababb89..3a7428a88 100644 --- a/CONTRIBUTING.md +++ b/CONTRIBUTING.md @@ -33,9 +33,16 @@ mruby should be highly portable to other systems and compilers. For this it is recommended to keep your code as close as possible to the C99 standard (http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf). -Although we target C99, Visual C++ is also an important target for mruby. For -this reason a declaration of a local variable has to be at the beginning of a -scope block. +Although we target C99, we've heard some compilers in the embedded environment +still requires declarations of local variables to be at the beginning of a +scope. Until we confirm the situation has changed, we use the old-style +variable declaration. + +Visual C++ is also an important target for mruby (supported version is 2013 or +later). For this reason features that are not supported by Visual C++ may not +be used (e.g. `%z` of `strftime()`). + +NOTE: Old GCC requires `-std=gnu99` option to enable C99 support. #### Reduce library dependencies to a minimum |