When I try to use boost on an old Linux system, I get the

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Asked: May 16, 20262026-05-16T05:50:59+00:00 2026-05-16T05:50:59+00:00

When I try to use boost on an old Linux system, I get the

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When I try to use boost on an old Linux system, I get the message:

Compiler not configured – please reconfigure

The version of my gcc is:

gcc version 2.9-gnupro-99r1

And in boost’s gcc.hpp file I see:

// versions check:
// we don't know gcc prior to version 2.90:
#if (__GNUC__ == 2) && (__GNUC_MINOR__ < 90)
#  error "Compiler not configured - please reconfigure"
#endif

So, are gcc 2.9 and 2.90 actually the same thing? If yes – can I just update the gcc.hpp? And if not, how can I still use boost?

EDIT:

I actually tried to change (__GNUC_MINOR__ < 90) to (__GNUC_MINOR__ < 9).
Seems like 2.9 and 2.90 are not the same because now I get compilation errors.

Seems like the errors are because this compiler doesn’t support the \ (line extension) characters in the preprocessor macros. These line breaks are used by boost in many places.