[Buildroot] kernel image size depends on toolchain?

Peter Korsgaard jacmet at uclibc.org
Wed Jun 11 13:58:11 UTC 2008

>>>>> "Andreas" == Andreas Kuehn <Andreas.Kuehn at gin.de> writes:


 Andreas> Right from the .config file....
 Andreas> BR2_BINUTILS_VERSION="2.18"

 Andreas> I suppose version 2.18 is the "old" version?  Meanwhile, I
 Andreas> changed to version and did a complete rebuild
 Andreas> with a well known result:

 Andreas> Image Type:   ARM Linux Kernel Image (uncompressed)
 Andreas> Data Size:    4528100 Bytes = 4421.97 kB = 4.32 MB

 Andreas> I don't know where that commit you mentioned has gone to
 Andreas> (where does that 1e621a8e3752367d4aae78a8ab00a18fb2793f34
 Andreas> belong to). Is it the kernel tree or the binutils and
 Andreas> finally which version?

It's from the kernel git tree. It's a simple oneliner, you could maybe
patch it by hand in your Linux checkout:

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index fa4ea9f..6c2d539 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -12,7 +12,7 @@
 LDFLAGS_vmlinux        :=-p --no-undefined -X
-OBJCOPYFLAGS   :=-O binary -R .note -R .comment -S
+OBJCOPYFLAGS   :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
 GZFLAGS                :=-9
 #CFLAGS                +=-pipe
 # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:

Bye, Peter Korsgaard

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