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authorJulius Werner <jwerner@chromium.org>2013-10-15 17:36:17 -0700
committerIsaac Christensen <isaac.christensen@se-eng.com>2014-09-22 18:41:54 +0200
commitc505837e67aa4fb89964c849d905fa8d44459152 (patch)
treef7e18fbcb50e54509c3a2a6365cf9a3365dfde67 /toolchain.inc
parent08539b3b986a1eb564815f72897b448e2bd69b5b (diff)
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arm: Have the linker garbage-collect unused functions and variables
This patch activates -ffunction-sections and -fdata-sections for the compiler and --gc-sections for the linker. This will strip out all unused functions and static/global variables from the final binaries and reduce the amount of data we need to read over SPI. A quick test with ToT images shows a 2.5k (13%) / 10k (29%) / 12k (28%) reduction on Nyan and 3k (38%) / 23k (50%) / 13k (29%) on Pit, respectively for bootblock / romstage / ramstage. Change-Id: I052411d4ad190d0395921ac4d4677341fb91568a Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/177111 (cherry picked from commit 5635b138778dea67a5f179e13003132be07f7e59) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6904 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'toolchain.inc')
-rw-r--r--toolchain.inc5
1 files changed, 1 insertions, 4 deletions
diff --git a/toolchain.inc b/toolchain.inc
index 326e474be..0e3c0d194 100644
--- a/toolchain.inc
+++ b/toolchain.inc
@@ -57,10 +57,7 @@ ARCHDIR-i386 := x86
ARCHDIR-x86_32 := x86
ARCHDIR-arm := arm
-CFLAGS_arm += \
- -mno-unaligned-access\
- -mthumb\
- -mthumb-interwork
+CFLAGS_arm := -mno-unaligned-access -ffunction-sections -fdata-sections
toolchain_to_dir = \
$(foreach arch,$(ARCH_SUPPORTED),\