From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joey Oravec Date: Mon, 09 Apr 2012 17:00:57 -0400 Subject: [U-Boot] ld fails with .bss / .rel.dyn overlap for 2011.12 Message-ID: <4F834E09.3010600@drewtech.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de This email is to report a problem building u-boot 2011.12 with a gcc 4.3.2 toolchain. I've added support locally for a marvell 78xx0 based board. It's using arm926ejs and I have not modified the *.lds linker script. Case 1: With gcc 4.3.2 provided by marvell, the build fails with this error: arm-mv5vfp-linux-gnueabi-ld: section .bss [00000000fffbba08 -> 00000000fffc3137] overlaps section .rel.dyn [00000000fffbba08 -> 00000000fffbeea7] arm-mv5vfp-linux-gnueabi-ld: section .dynsym [00000000fffbeea8 -> 00000000fffbef57] overlaps section .bss [00000000fffbba08 -> 00000000fffc3137] arm-mv5vfp-linux-gnueabi-ld: u-boot: section .bss lma 0xfffbba08 overlaps previous sections make: *** [u-boot] Error 1 Through trial-and-error, I found that this error only occurs when .bss is unaligned. In my example .bss is only 2-byte aligned and u-boot.map indicates that the linker added 2-bytes of zero fill at the end of bss. If I add a global unsigned short so .bss is 4-byte aligned the error goes away and gcc produces a good binary. Case 2: With gcc 4.6.3 built with crosstool-ng, the build has no problem. I can provide u-boot.map files (~70k) for each case. -joey