Date: Mon, 4 Jan 2016 20:36:29 -0800 From: Mark Millard <markmi@dsl-only.net> To: freebsd-arm <freebsd-arm@freebsd.org>, FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Subject: 11.0-CURRENT Bug 205904 "unresolvable R_ARM_MOVW_ABS_NC relocation" vs. forced -fPIC use Message-ID: <8079E6B2-DC53-4BFA-9129-8A88A1A1F044@dsl-only.net>
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I had in Bug 205904 reported that trying "portmaster -DK textproc/expat2" in a -march=armv7-a -mcpu=cortex-a7 context (on an rpi2b) gets (for -r293129 and its /usr/bin/ tools): > unresolvable R_ARM_MOVW_ABS_NC relocation against symbol `malloc@@FBSD_1.0' in an attempted link operation. I've now added a comment saying in part: > Investigating the issue I had the portmaster activity use the /usr/local/arm-gnueabi-freebsd/bin/ tools instead (via /etc/make.conf changes) and in that context the message is different but it was still an error: > >> relocation R_ARM_MOVW_ABS_NC against `malloc' can not be used when making a shared object; recompile with -fPIC > > > Trying again with -fPIC does let the portmaster command complete in this /usr/local/arm-gnueabi-freebsd/bin/ based tool context. > > > Going back and trying -fPIC in the /usr/bin/ based tools context also lets the portmaster command complete. (That context without -fPIC did not directly indicate to try -fPIC in its messages.) > > > So maybe part of the issue is having compiler arguments like -fPIC show up in commands for contexts like -march=armv7-a -mcpu=cortex-a7 without manual intervention in each case. For ports: some parts of a more complicated port might need[] such and other parts might not. I used /etc/make.conf to force -fPIC being present. I started this investigation to try some things after Ian Lepore's -r292964 for the /usr/bin/ binutils. I picked on textproc/expat2 initially as something fairly simple and limited to C. (clang++ has problems under SCTLR bit[1]==1 [alignment required] on arm that make clang++ Bus Error during most C++ compiles). === Mark Millard markmi at dsl-only.net
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