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Error when cross-compiling makekeys

Submitted by Ross Burton @ross

Assigned to Xorg Project Team

Link to original bug (#55424)

Description

When cross-compiling makekeys on an older host (CentOS 5, for example):

makekeys-makekeys.o: In function main': makekeys.c:(.text+0x85): undefined reference to __isoc99_sscanf' makekeys.c:(.text+0xa7): undefined reference to `__isoc99_sscanf'

makekeys.c doesn't include config.h (as that has target information, not host) and this old libc doesn't expose these functions without _GNU_SOURCE.

We're working around this by passing -D_GNU_SOURCE when compiling makekeys, but Daniel Stone informed me that won't be acceptable upstream as it could potentially break/not work on Solaris.

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