[Coin-discuss] -pedantic-errors and compiling for x86-64 Windows with gcc

[Kish Shen]

Hi,

I am trying to build Cbc/Clp for 64 bit x86-64 Windows, using mingw-w64 
(the 64 bit version of mingw), which uses gcc (version 4.4.0) as the 
compiler.

I get the following error:

/../CoinUtils/src/CoinModelUseful2.cpp:1034: error: ISO C++ 1998 does 
not support 'long long'
make[2]: *** ../../../CoinUtils/src/CoinModelUseful2.cpp:949: error: ISO 
C++ 1998 does not support 'long long'
../../../CoinUtils/src/CoinModelUseful2.cpp:992: error: ISO C++ 1998 
does not support 'long long'
../../../CoinUtils/src/CoinModelUseful2.cpp:1033: error: ISO C++ 1998 
does not support 'long long'
../..[CoinModelUseful2.lo] Error 1

C/C++ for 64 bit Windows has long that are 32 bit in size, so when you 
want an integer type that is word size (64 bit), I cannot see how you 
could avoid using long long (or the MS specific __int64, for older MSVC).

The error seem to be due to the -pedandic-errors flag given to gcc. I am
working around this problem by calling configure with
ADD_CXXFLAGS=-Wno-long-long and ADD_CFLAGS=-Wno-long-long.
Perhaps this should be incorporated into the configure files, or is 
there a better way to work around this problem?

Cheers,

Kish

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