[PATCH] RISC-V/BFD: Correct a missing initializer error with pre-4.7 GCC

Maciej W. Rozycki macro@mips.com
Sat Feb 3 18:52:00 GMT 2018

Correct a commit 9d06997adb88 ("RISC-V: Relax RISCV_PCREL_* to 
RISCV_GPREL_*") regression and remove a `-Wmissing-field-initializers' 
compilation error:

cc1: warnings being treated as errors
.../bfd/elfnn-riscv.c: In function '_bfd_riscv_relax_pc':
.../bfd/elfnn-riscv.c:3117: error: missing initializer
.../bfd/elfnn-riscv.c:3117: error: (near initialization for 'hi_reloc.hi_addend')
make[4]: *** [elf64-riscv.lo] Error 1

which for versions of GCC before 4.7 prevents support for RISC-V targets 
from being built.  See also GCC PR c/36750.

	* elfnn-riscv.c (_bfd_riscv_relax_pc): Use `memset' to 
	initialize `hi_reloc'.

 This has popped up as a regression in routine cross-target testing for an 
unrelated change and should be obvious.  OK to apply?

 bfd/elfnn-riscv.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: binutils/bfd/elfnn-riscv.c
--- binutils.orig/bfd/elfnn-riscv.c	2018-01-10 20:12:45.000000000 +0000
+++ binutils/bfd/elfnn-riscv.c	2018-01-18 08:00:40.342123901 +0000
@@ -3114,7 +3114,8 @@ _bfd_riscv_relax_pc  (bfd *abfd,
   /* Chain the _LO relocs to their cooresponding _HI reloc to compute the
    * actual target address.  */
-  riscv_pcgp_hi_reloc hi_reloc = {0};
+  riscv_pcgp_hi_reloc hi_reloc;
+  memset (&hi_reloc, 0, sizeof (hi_reloc));
   switch (ELFNN_R_TYPE (rel->r_info))
     case R_RISCV_PCREL_LO12_I:

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