是否有可能让GCC用BOM源文件编译UTF-8? [英] Is it possible to get GCC to compile UTF-8 with BOM source files?
问题描述
例如:
// A =π.r²
doubleπ= 3.14;
仅当我先删除BOM时,GCC才会愉快地编译这些文件。如果我不删除物料清单,我会收到类似这样的错误:
wwga_hydutils.cpp:28:9:error:stray'\ 317'in program
wwga_hydutils.cpp:28:9:error:stray'\200'in program
这引出了我的疑问:
有没有办法让GCC编译UTF-8文件而不先删除BOM ?
我正在使用:
和:
- uBuntu Oneiric 11.10
- GCC 4.6.1(由 apt-get install gcc )
编辑:
作为第一位评论者指出,我的问题是不是 BOM,但是在字符串常量之外有非ascii字符。 GCC不喜欢符号名称中的非ascii字符,但事实证明GCC完全兼容带有BOM的UTF-8。
<根据 GCC Wiki ,这还不支持。您可以使用 -fextended-identifiers
并预处理您的代码以将标识符转换为UCN。从链接页面:
perl -pe'BEGIN {binmode STDIN,:utf8; } s /(.)/ ord($ 1)< 128? $ 1:sprintf(\\U%08x,ord($ 1))/ ge;'
另请参阅 g ++ unicode变量名称和I develop C++ cross platform using Microsoft Visual Studio on Windows and GCC on uBuntu Linux.
In Visual Studio I can use unicode symbols like "π" and "²" in my code. Visual Studio always saves the source files as UTF-8 with BOM (Byte Order Mark).
For example:
// A = π.r²
double π = 3.14;
GCC happily compiles these files only if I remove the BOM first. If I do not remove the BOM, I get errors like these:
wwga_hydutils.cpp:28:9: error: stray ‘\317’ in program
wwga_hydutils.cpp:28:9: error: stray ‘\200’ in program
Which brings me to the question:
Is there a way to get GCC to compile UTF-8 files without first removing the BOM?
I'm using:
- Windows 7
- Visual Studio 2010
and:
- uBuntu Oneiric 11.10
- GCC 4.6.1 (as provided by apt-get install gcc)
Edit:
As the first commenter pointed out, my problem was not the BOM, but having non-ascii characters outside of string constants. GCC does not like non-ascii characters in symbol names, but it turns out GCC is fully compatible with UTF-8 with BOM.
According to the GCC Wiki, this isn't supported yet. You can use -fextended-identifiers
and pre-process your code to convert the identifiers to UCN. From the linked page:
perl -pe 'BEGIN { binmode STDIN, ":utf8"; } s/(.)/ord($1) < 128 ? $1 : sprintf("\\U%08x", ord($1))/ge;'
See also g++ unicode variable name and Unicode Identifiers and Source Code in C++11?
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