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There's a help.exp test that checks that the help message for -Wabsolute-value mentions it's available in C and ObjC, when compiling a C++ program. However, if GCC is built with the C++ language disabled, the .cc file is compiled as C, and the message [available in C...] becomes [disabled] instead, because that's the default for the flag in C. I suppose it might also be possible to disable the C language, and then the multitude of help.exp tests that name c as the source language will fail. This patch avoids these fails: it detects the message "compiler not installed" in the compiler output, and bails out as "unsupported". for gcc/testsuite/ChangeLog * lib/options.exp (check_for_options_with_filter): Detect unavailable compiler for the selected language, and bail out as unsupported.
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