Really weird build problem: please help

[Paolo Carlini]

Hi,

I'm playing with finally changing some algorithms to use cpp_type_traits
instead of type_traits, and class templates instead of function templates as
advised by Gaby some time ago, and stumbled upon this real mystery.

If I apply the trivial attached patch, then the build FAILS in 
ios_init.cc (!!!),
like below.

I'm lost. Perhaps an #include guard is missing somewhere? I have no clue...

Paolo.

/////////////////

/home/paolo/Gcc/cvs-dirs/gcc-head-build/gcc/xgcc -shared-libgcc 
-B/home/paolo/Gcc/cvs-dirs/gcc-head-build/gcc/ -nostdinc++ 
-L/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3/src 
-L/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3/src/.libs 
-B/usr/local/gcc-exp/i686-pc-linux-gnu/bin/ 
-B/usr/local/gcc-exp/i686-pc-linux-gnu/lib/ -isystem 
/usr/local/gcc-exp/i686-pc-linux-gnu/include -isystem 
/usr/local/gcc-exp/i686-pc-linux-gnu/sys-include 
-I/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3/include/i686-pc-linux-gnu 
-I/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3/include 
-I/home/paolo/Gcc/cvs-dirs/gcc-head/gcc/libstdc++-v3/libsupc++ -O2 -g 
-O2 -g -O2 -D_GNU_SOURCE -fno-implicit-templates -Wall -Wextra 
-Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once 
-ffunction-sections -fdata-sections -c 
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc  -fPIC -DPIC -o 
.libs/ios_init.o
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc: In constructor 
`std::ios_base::Init::Init()':
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:90: error: 
`buf_cout_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:90: error: 
expected type-specifier before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:90: error: ISO C++ 
forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:90: error: 
expected `;' before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:91: error: 
`buf_cin_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:91: error: 
expected type-specifier before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:91: error: ISO C++ 
forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:91: error: 
expected `;' before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:92: error: 
`buf_cerr_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:92: error: 
expected type-specifier before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:92: error: ISO C++ 
forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:92: error: 
expected `;' before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:104: error: 
`buf_wcout_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:104: error: 
expected type-specifier before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:104: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:104: error: 
expected `;' before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:105: error: 
`buf_wcin_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:105: error: 
expected type-specifier before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:105: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:105: error: 
expected `;' before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:106: error: 
`buf_wcerr_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:106: error: 
expected type-specifier before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:106: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:106: error: 
expected `;' before "stdio_sync_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc: In static member 
function `static bool std::ios_base::sync_with_stdio(bool)':
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:163: error: 
`buf_cout_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:163: error: 
expected template-name before '<' token
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:163: error: 
expected primary-expression before "char"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:163: error: 
expected `;' before "char"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:164: error: 
`buf_cin_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:164: error: 
expected template-name before '<' token
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:164: error: 
expected primary-expression before "char"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:164: error: 
expected `;' before "char"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:165: error: 
`buf_cerr_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:165: error: 
expected template-name before '<' token
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:165: error: 
expected primary-expression before "char"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:165: error: 
expected `;' before "char"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:168: error: 
`buf_wcout_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:168: error: 
expected template-name before '<' token
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:168: error: 
expected primary-expression before "wchar_t"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:168: error: 
expected `;' before "wchar_t"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:169: error: 
`buf_wcin_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:169: error: 
expected template-name before '<' token
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:169: error: 
expected primary-expression before "wchar_t"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:169: error: 
expected `;' before "wchar_t"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:170: error: 
`buf_wcerr_sync' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:170: error: 
expected template-name before '<' token
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:170: error: 
expected primary-expression before "wchar_t"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:170: error: 
expected `;' before "wchar_t"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:176: error: 
`buf_cout' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:176: error: 
expected type-specifier before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:176: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:176: error: 
expected `;' before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:177: error: 
`buf_cin' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:177: error: 
expected type-specifier before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:177: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:177: error: 
expected `;' before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:178: error: 
`buf_cerr' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:178: error: 
expected type-specifier before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:178: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:178: error: 
expected `;' before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:185: error: 
`buf_wcout' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:185: error: 
expected type-specifier before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:185: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:185: error: 
expected `;' before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:186: error: 
`buf_wcin' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:186: error: 
expected type-specifier before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:186: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:186: error: 
expected `;' before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:187: error: 
`buf_wcerr' was not declared in this scope
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:187: error: 
expected type-specifier before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:187: error: ISO 
C++ forbids declaration of `type name' with no type
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:187: error: 
expected `;' before "stdio_filebuf"
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:163: warning: 
unused variable 'buf_cout_sync'
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:164: warning: 
unused variable 'buf_cin_sync'
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:165: warning: 
unused variable 'buf_cerr_sync'
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:168: warning: 
unused variable 'buf_wcout_sync'
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:169: warning: 
unused variable 'buf_wcin_sync'
../../../../gcc-head/gcc/libstdc++-v3/src/ios_init.cc:170: warning: 
unused variable 'buf_wcerr_sync'
make[2]: *** [ios_init.lo] Error 1
make[2]: Leaving directory 
`/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory 
`/home/paolo/Gcc/cvs-dirs/gcc-head-build/i686-pc-linux-gnu/libstdc++-v3'
make: *** [all] Error 2

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