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cmake: LD: Allow input sections to remain unsorted

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We have users that have problems in their linker scripts where the
order of input sections matters.

To allow users to use the latest Zephyr while working on a fix to
their linker scripts we add an option to allow leaving the sections
unsorted.

See discussion here for more details
https://github.com/zephyrproject-rtos/zephyr/pull/14183

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
This commit is contained in:
Sebastian Bøe 2019-03-15 14:05:09 +01:00 committed by Carles Cufí
parent 5895f8d8f1
commit 3a0597f099
2 changed files with 10 additions and 1 deletions
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3
CMakeLists.txt
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@ -396,7 +396,8 @@ zephyr_ld_options(
# Sort the common symbols and each input section by alignment
# in descending order to minimize padding between these symbols.
zephyr_ld_options(
zephyr_ld_option_ifdef(
CONFIG_LINKER_SORT_BY_ALIGNMENT
${LINKERFLAGPREFIX},--sort-common=descending
${LINKERFLAGPREFIX},--sort-section=alignment
)

8
Kconfig.zephyr
View file

@ -186,6 +186,14 @@ config CHECK_LINK_MAP
Run a linker address generation validity checker at the end of the
build.
config LINKER_SORT_BY_ALIGNMENT
bool "Sort input sections by alignment"
default y
help
This turns on the linker flag to sort sections by alignment
in decreasing size of symbols. This helps to minimize
padding between symbols.
endmenu
menu "Compiler Options"