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9c0a81a21b
When using precompiled headers, changing any macros defined on the command line will invalidate the precompiled header. With toolchain-wrapper adding __DATE__ and __TIME__, any commits to Buildroot will invalidate incremental builds regardless of whether the precompiled header actually uses those values (affecting _OVERRIDE_SRCDIR). GCC-7 and later support SOURCE_DATE_EPOCH and use it to define __DATE__ and __TIME__ internally, avoiding any impact on precompiled headers. Disable the custom handling in toolchain-wrapper if GCC is version 7 or newer. Signed-off-by: John Keeping <john@metanate.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> (cherry picked from commit 408bc354a9c14b3940938cfb7a3e3eefa81641a5) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>