Author: cem
Date: Fri Nov 23 18:23:29 2018
New Revision: 340843
URL: https://svnweb.freebsd.org/changeset/base/340843
Log:
rtld: Silence a false positive GCC 6.4.0 warning
The function reloc_non_plt has complicated variable lifetimes that GCC 6.4.0
(the version currently used by amd64-xtoolchain-gcc) misunderstands and
produces an erroneous warning about. Silence it to allow the -Werror build
to proceed.
Reviewed by: emaste
Modified:
head/libexec/rtld-elf/Makefile
Modified: head/libexec/rtld-elf/Makefile
==============================================================================
--- head/libexec/rtld-elf/Makefile Fri Nov 23 18:15:23 2018
(r340842)
+++ head/libexec/rtld-elf/Makefile Fri Nov 23 18:23:29 2018
(r340843)
@@ -102,6 +102,10 @@ ${PROG_FULL}: ${VERSION_MAP}
# GCC warns about redeclarations even though they have __exported
# and are therefore not identical to the ones from the system headers.
CFLAGS+= -Wno-redundant-decls
+# GCC (6.4.0) doesn't grok the complicated lifetimes in reloc_non_plt():
+.if ${MACHINE_CPUARCH} == "amd64"
+CFLAGS.reloc.c+=-Wno-maybe-uninitialized
+.endif
.if ${COMPILER_VERSION} < 40300
# Silence -Wshadow false positives in ancient GCC
CFLAGS+= -Wno-shadow
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