[ruby-dev:47099] [ruby-trunk - Bug #7946] 1.9.3-p385以降でclangでのビルド時にエラー（error: implicit conversion loses integer precision）

Issue #7946 has been updated by naruse (Yui NARUSE).


I noticed that clang version 4.1 doesn't fail.

%  clang --version
Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin12.2.1
Thread model: posix

But clang version 4.2 fails.

%  clang --version
Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
Target: x86_64-apple-darwin12.2.1
Thread model: posix

Anyway Ruby should avoid this.
----------------------------------------
Bug #7946: 1.9.3-p385以降でclangでのビルド時にエラー（error: implicit conversion loses integer precision）
https://bugs.ruby-lang.org/issues/7946#change-36951

Author: d6rkaiz (Isao Sugimoto)
Status: Open
Priority: Normal
Assignee: mrkn (Kenta Murata)
Category: 
Target version: 
ruby -v: 1.9.3-p385 later


=begin

OS X 10.8.2でclangでビルドを行う際にruby 1.9.3-p385以降でclangでコンパイル時にエラーとなるようになりました。

バグとのことですので報告します。
1.9.3-p385 および 1.9.3-p392 で発生します。


     BUILD FAILED
     
     Inspect or clean up the working tree at /var/folders/t0/n008mdzj4nz0_cswflz6xwch0000gn/T/ruby-build.20130223143931.52037
     Results logged to /var/folders/t0/n008mdzj4nz0_cswflz6xwch0000gn/T/ruby-build.20130223143931.52037.log
     
     Last 10 log lines:
     compiling safe.c
     compiling signal.c
     compiling sprintf.c
     compiling st.c
     st.c:520:35: error: implicit conversion loses integer precision: 'st_index_t' (aka 'unsigned long') to 'int' [-Werror,-Wshorten-64-to-32]
                 i = table->num_entries++;
                   ~ ~~~~~~~~~~~~~~~~~~^~
     1 error generated.
     make: *** [st.o] Error 1
     make: *** Waiting for unfinished jobs....

clangのバージョンなど

     $ clang -v
     Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
     Target: x86_64-apple-darwin12.2.1
     Thread model: posix

参考 http://qiita.com/items/e7c4374d25ba2056a7b7

=end


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