It is not a bug. The macro for the standard error stream is `stderr` rather than `STDERR`.
------------------ Best regards, lh_mouse 2016-07-16 ------------------------------------------------------------- 发件人：Jim Michaels <[email protected]> 发送日期：2016-07-16 11:59 收件人：mingw64 users 抄送： 主题：[Mingw-w64-public] bug in 20160708 x32 x32, STDERR not defined in stdio.h #include<stdio.h> fprintf(STDERR, "eolconvert:ERROR: unable to open file \"%s\" for input\r\n", "abc"); STDERR is not defined in stdio.h. also, why does 0708's date say 7.0.0 20160609? I suspect there's a version problem. Fri 07/15/2016 17:26:18.94|C:\Users\Kristina\Desktop\prj\eolconvert\1.0\win|>g++ -v -save-temps -DTEST -s -static -lstdc++ -std=c++11 -o 32\eolconvert.exe eolconvert.cpp Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=c:/gcc-7-win32/bin/../libexec/gcc/i686-w64-mingw32/7.0.0/lto-wrapper.exe Target: i686-w64-mingw32 Configured with: /home/cauchy/vcs/svn/gcc/trunk/configure --prefix=/home/cauchy/native/gcc-7-win32 --with-sysroot=/home/cauchy/native/gcc-7-win32 --build=x 86_64-unknown-linux-gnu --host=i686-w64-mingw32 --target=i686-w64-mingw32 --disable-multilib --disable-nls --disable-win32-registry --disable-gcov-tool --e nable-checking=release --enable-languages=c,c++,fortran --enable-fully-dynamic-string --with-arch=core2 --with-tune=generic Thread model: win32 gcc version 7.0.0 20160609 (experimental) (GCC) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-D' 'TEST' '-s' '-static' '-std=c++11' '-o' '32\eolconvert.exe' '-mtune=generic' '-march=core2' c:/gcc-7-win32/bin/../libexec/gcc/i686-w64-mingw32/7.0.0/cc1plus.exe -E -quiet -v -iprefix c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/ -isysroot c:\gcc-7-win32\bin\../../gcc-7-win32 -U_REENTRANT -D TEST eolconvert.cpp -mtune=generic -march=core2 -std=c++11 -fpch-preprocess -o eolconvert.ii ignoring duplicate directory "c:/gcc-7-win32/lib/gcc/../../lib/gcc/i686-w64-mingw32/7.0.0/../../../../include/c++/7.0.0" ignoring duplicate directory "c:/gcc-7-win32/lib/gcc/../../lib/gcc/i686-w64-mingw32/7.0.0/../../../../include/c++/7.0.0/i686-w64-mingw32" ignoring duplicate directory "c:/gcc-7-win32/lib/gcc/../../lib/gcc/i686-w64-mingw32/7.0.0/../../../../include/c++/7.0.0/backward" ignoring duplicate directory "c:/gcc-7-win32/lib/gcc/../../lib/gcc/i686-w64-mingw32/7.0.0/include" ignoring nonexistent directory "c:\gcc-7-win32\bin\../../gcc-7-win32/home/cauchy/native/gcc-7-win32/lib/gcc/i686-w64-mingw32/7.0.0/../../../../include" ignoring duplicate directory "c:/gcc-7-win32/lib/gcc/../../lib/gcc/i686-w64-mingw32/7.0.0/include-fixed" ignoring duplicate directory "c:/gcc-7-win32/lib/gcc/../../lib/gcc/i686-w64-mingw32/7.0.0/../../../../i686-w64-mingw32/include" ignoring nonexistent directory "c:\gcc-7-win32\bin\../../gcc-7-win32/mingw/include" #include "..." search starts here: #include <...> search starts here: c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/../../../../include/c++/7.0.0 c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/../../../../include/c++/7.0.0/i686-w64-mingw32 c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/../../../../include/c++/7.0.0/backward c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/include c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/include-fixed c:\gcc-7-win32\bin\../lib/gcc/i686-w64-mingw32/7.0.0/../../../../i686-w64-mingw32/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-D' 'TEST' '-s' '-static' '-std=c++11' '-o' '32\eolconvert.exe' '-mtune=generic' '-march=core2' c:/gcc-7-win32/bin/../libexec/gcc/i686-w64-mingw32/7.0.0/cc1plus.exe -fpreprocessed eolconvert.ii -quiet -dumpbase eolconvert.cpp -mtune=generic -march=co re2 -auxbase eolconvert -std=c++11 -version -o eolconvert.s GNU C++11 (GCC) version 7.0.0 20160609 (experimental) (i686-w64-mingw32) compiled by GNU C version 7.0.0 20160609 (experimental), GMP version 6.1.0, MPFR version 3.1.4-p2, MPC version 1.0.3, isl version 0.15 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C++11 (GCC) version 7.0.0 20160609 (experimental) (i686-w64-mingw32) compiled by GNU C version 7.0.0 20160609 (experimental), GMP version 6.1.0, MPFR version 3.1.4-p2, MPC version 1.0.3, isl version 0.15 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: 85f4626b884448f9672ebbd3379aa3ed eolconvert.cpp:106:146: error: explicit qualification in declaration of 'std::__cxx11::string str::str_replace(std::__cxx11::string&, std::__cxx11::string& , std::__cxx11::string&, size_t, bool, bool)' std::string str::str_replace(std::string& target, std::string& findwhat, std::string& replacewith, size_t pos=0, bool iCase=false, bool all=true) { ^ eolconvert.cpp: In function 'int main(int, char**)': eolconvert.cpp:191:12: error: 'STDERR' was not declared in this scope fprintf(STDERR, "eolconvert:ERROR: unable to open file \"%s\" for input\r\n", argv[i]); ^~~~~~ eolconvert.cpp:203:12: error: 'STDERR' was not declared in this scope fprintf(STDERR, "eolconvert:ERROR: unable to open file \"%s\" for output\r\n", argv[i]); ^~~~~~ also, const after a declaration errors. eolconvert.cpp:6:33: error: expected ',' or '...' before 'const' int compare(std::string& first const, std::string& second const, bool iCase=false, size_t firstPos=0) const { ^~~~~ ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? 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