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makefiles/vars.inc.mk: do not export LINKFLAGS

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It is only used by `Makefile.include` and should not be used by sub-make
instances.

This is required to prevent evaluating `LINKFLAGS` when not needed and a
required step to not evaluate it on the host with for example `avr-ld`
when building in docker.

I checked usage with:

    git grep -e '(LINKFLAGS)' -e '{LINKFLAGS}'

Packages may be using it but `LINKFLAGS` is a RIOT way of naming
things and even if `generate-xcompile-toolchain` uses `LINK` it does not
use `LINKFLAGS`.
This commit is contained in:
Gaëtan Harter 2019-01-23 17:17:50 +01:00
parent 1f7292c358
commit be75f734d1
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makefiles/vars.inc.mk
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@ -56,7 +56,7 @@ export ARFLAGS # Command-line options to pass to AR, default `rcs`
export AS # The assembler.
export ASFLAGS # Flags for the assembler.
export LINK # The command used to link the files. Must take the same parameters as GCC, i.e. "ld" won't work.
export LINKFLAGS # Flags to supply in the linking step.
# LINKFLAGS # Flags to supply in the linking step.
export LTOFLAGS # extra CFLAGS for compiling with link time optimization
export OBJCOPY # The command used to create the HEXFILE.
export OFLAGS # The parameter for OBJCOPY, e.g. to strip the debug information.