So clang fails to build on armv7: http://build-failures.rhaalovely.net/arm/2017-01-05/devel/llvm.log
The issue is that immediate addressing of the branch instruction can only access a 32MB range around the program counter. clang is above that limit, resulting in relocation overflow. Also the .init/.fini sections are too far apart. The problem is similar on powerpc, where ld --relax seems ineffective: http://build-failures.rhaalovely.net//powerpc/2017-01-18/devel/llvm.log With a pending csu diff by guenther@ and a bump of MAXTSIZ, the diff below gives us an llvm package for armv7. As pointed out by jsg@, FreeBSD also uses -mlong-calls for arm: https://reviews.freebsd.org/D4855 It is hoped that this diff will also help powerpc, but no tests have been performed afaik. ok? Index: Makefile =================================================================== RCS file: /d/cvs/ports/devel/llvm/Makefile,v retrieving revision 1.130 diff -u -p -p -u -r1.130 Makefile --- Makefile 8 Jan 2017 01:59:49 -0000 1.130 +++ Makefile 10 Feb 2017 03:20:10 -0000 @@ -68,8 +68,13 @@ CONFIGURE_ARGS = -DLLVM_ENABLE_FFI:Bool= # Have the build disable PIE to workaround breakage that was # introduced when PIE was enabled .if ${MACHINE_ARCH} == "powerpc" -CONFIGURE_ARGS += -DCMAKE_EXE_LINKER_FLAGS="-Wl,--relax -nopie" -CONFIGURE_ARGS += -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--relax -nopie" +CFLAGS += -mlongcall +CXXFLAGS += -mlongcall +CONFIGURE_ARGS += -DCMAKE_EXE_LINKER_FLAGS="-nopie" +CONFIGURE_ARGS += -DCMAKE_SHARED_LINKER_FLAGS="-nopie" +.elif ${MACHINE_ARCH} == "arm" +CFLAGS += -mlong-calls +CXXFLAGS += -mlong-calls .endif TEST_TARGET = check -- jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
