mirror of https://github.com/acidanthera/audk.git
1d212a83df
gcc-8 (which is part of Fedora 28) enables the new warning "-Wstringop-truncation" in "-Wall". This warning is documented in detail at <https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html>; the introduction says > Warn for calls to bounded string manipulation functions such as strncat, > strncpy, and stpncpy that may either truncate the copied string or leave > the destination unchanged. It breaks the BaseTools build with: > EfiUtilityMsgs.c: In function 'PrintMessage': > EfiUtilityMsgs.c:484:9: error: 'strncat' output may be truncated copying > between 0 and 511 bytes from a string of length 511 > [-Werror=stringop-truncation] > strncat (Line, Line2, MAX_LINE_LEN - strlen (Line) - 1); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > EfiUtilityMsgs.c:469:9: error: 'strncat' output may be truncated copying > between 0 and 511 bytes from a string of length 511 > [-Werror=stringop-truncation] > strncat (Line, Line2, MAX_LINE_LEN - strlen (Line) - 1); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > EfiUtilityMsgs.c:511:5: error: 'strncat' output may be truncated copying > between 0 and 511 bytes from a string of length 511 > [-Werror=stringop-truncation] > strncat (Line, Line2, MAX_LINE_LEN - strlen (Line) - 1); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The right way to fix the warning would be to implement string concat with snprintf(). However, Microsoft does not appear to support snprintf() before VS2015 <https://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010>, so we just have to shut up the warning. The strncat() calls flagged above are valid BTW. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Cole Robinson <crobinso@redhat.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Yonghong Zhu <yonghong.zhu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Liming Gao <liming.gao@intel.com> |
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