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poky-tiny: enable section removal

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Use GCC sections flags so that unused sections can be garbage
collected at link time.

(From meta-yocto rev: 70176ee6235c2545e18df855cac2c3524b7e50e4)

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Sinan Kaya 2020-11-16 00:40:33 +00:00 committed by Richard Purdie
parent f107844a62
commit c39dfcbabc
2 changed files with 24 additions and 0 deletions
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22
meta-poky/conf/distro/include/gcsections.inc Normal file
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@ -0,0 +1,22 @@
CFLAGS_SECTION_REMOVAL = "-ffunction-sections -fdata-sections"
LDFLAGS_SECTION_REMOVAL = "-Wl,--gc-sections"
# packages with build problems using sections
CFLAGS_SECTION_REMOVAL_pn-glibc = ""
LDFLAGS_SECTION_REMOVAL_pn-glibc = ""
CFLAGS_SECTION_REMOVAL_pn-cairo = ""
LDFLAGS_SECTION_REMOVAL_pn-cairo = ""
CFLAGS_SECTION_REMOVAL_pn-perl = ""
LDFLAGS_SECTION_REMOVAL_pn-perl = ""
CFLAGS_SECTION_REMOVAL_pn-grub-efi = ""
LDFLAGS_SECTION_REMOVAL_pn-grub-efi = ""
CFLAGS_SECTION_REMOVAL_pn-grub = ""
LDFLAGS_SECTION_REMOVAL_pn-grub = ""
# set default for target
CFLAGS_append_class-target = " ${CFLAGS_SECTION_REMOVAL}"
LDFLAGS_append_class-target = " ${LDFLAGS_SECTION_REMOVAL}"
# set default for nativesdk
CFLAGS_append_class-nativesdk = " ${CFLAGS_SECTION_REMOVAL}"
LDFLAGS_append_class-nativesdk = " ${LDFLAGS_SECTION_REMOVAL}"

2
meta-poky/conf/distro/poky-tiny.conf
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@ -29,6 +29,8 @@
# [ ] Modify busybox to allow for DISTRO_FEATURES-like confiruration
require conf/distro/poky.conf
require conf/distro/include/gcsections.inc
DISTRO = "poky-tiny"
DISTROOVERRIDES = "poky:poky-tiny"
TCLIBC = "musl"