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gcc-sanitizers: fix -Werror=maybe-uninitialized issue

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When DEBUG_BUILD = "1" added in local.conf, there
comes below build error when "bitbake gcc-sanitizers":
| ./../../../../../../../../work-shared/gcc-8.3.0-r0/gcc-8.3.0/libsanitizer/libbacktrace/../../libbacktrace/elf.c: In function 'elf_is_symlink':
| ../../../../../../../../../work-shared/gcc-8.3.0-r0/gcc-8.3.0/libsanitizer/libbacktrace/../../libbacktrace/elf.c:772:21: error: 'st.st_mode' may be used uninitialized in this function [-Werror=maybe-uninitialized]
|   return S_ISLNK (st.st_mode);

After commit[16643b0322 bitbake.conf: Use -Og in DEBUG_OPTIMIZATION]
introduced, "-Og" added to compiler when debug
build enabled.

Per https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00315.html,
the gcc upstream thinks the warning is a false
positive and suggests to use -O2 rather than -Og
or -O1 when compiling that file, so pass -Wno-error
to compiler when -Og is used to silence the error.

(From OE-Core rev: d8d657f082d4a86f93ce810e5d99eb5c93333d8a)

Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Mingli Yu
2019-04-22 16:41:32 +08:00
committed by Richard Purdie
parent 0ad9bbaf9d
commit b9b57a52ed
1 changed files with 3 additions and 0 deletions
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meta/recipes-devtools/gcc/gcc-sanitizers.inc
+3
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@@ -45,6 +45,9 @@ INHIBIT_DEFAULT_DEPS = "1"
ALLOW_EMPTY_${PN} = "1"
DEPENDS = "gcc-runtime virtual/${TARGET_PREFIX}gcc"
# used to fix ../../../../../../../../../work-shared/gcc-8.3.0-r0/gcc-8.3.0/libsanitizer/libbacktrace/../../libbacktrace/elf.c:772:21: error: 'st.st_mode' may be used uninitialized in this function [-Werror=maybe-uninitialized]
DEBUG_OPTIMIZATION_append = " -Wno-error"
BBCLASSEXTEND = "nativesdk"
PACKAGES = "${PN} ${PN}-dbg"