GCC中对C99的支持信息:
http://gcc.gnu.org/c99status.html
具体到版本4.4 vs 4.1
http://gcc.gnu.org/gcc-4.4/c99status.html
http://gcc.gnu.org/gcc-4.1/c99status.html
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摘录部分:
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4.4新增:
treatment of error conditions by math library functions (math_errhandling)? Library Issue Missing
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