diff options
Diffstat (limited to 'gcc10.patch')
| -rw-r--r-- | gcc10.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/gcc10.patch b/gcc10.patch new file mode 100644 index 000000000000..cad51f61e1b9 --- /dev/null +++ b/gcc10.patch @@ -0,0 +1,87 @@ +commit 3a58245198d7ea9521e1a856111df27f22822cb6 +Author: egnappahz <egnappah@gmail.com> +Date: Fri May 15 12:21:43 2020 +0200 + + disable warning as errors for gcc10 + + Signed-off-by: egnappahz <egnappah@gmail.com> + +diff --git a/Makefile b/Makefile +index d252219666fd..d4938ac6ebbf 100644 +--- a/Makefile ++++ b/Makefile +@@ -708,10 +708,6 @@ else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE + KBUILD_CFLAGS += -Os + endif + +-ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED +-KBUILD_CFLAGS += -Wno-maybe-uninitialized +-endif +- + # Tell gcc to never replace conditional load with a non-conditional one + KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) + +@@ -861,6 +857,9 @@ KBUILD_CFLAGS += -Wno-pointer-sign + # disable stringop warnings in gcc 8+ + KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) + ++# Enabled with W=2, disabled by default as noisy ++KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) ++ + # disable invalid "can't wrap" optimizations for signed / pointers + KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) + +diff --git a/init/Kconfig b/init/Kconfig +index 4f717bfdbfe2..ef59c5c36cdb 100644 +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -36,22 +36,6 @@ config TOOLS_SUPPORT_RELR + config CC_HAS_ASM_INLINE + def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null) + +-config CC_HAS_WARN_MAYBE_UNINITIALIZED +- def_bool $(cc-option,-Wmaybe-uninitialized) +- help +- GCC >= 4.7 supports this option. +- +-config CC_DISABLE_WARN_MAYBE_UNINITIALIZED +- bool +- depends on CC_HAS_WARN_MAYBE_UNINITIALIZED +- default CC_IS_GCC && GCC_VERSION < 40900 # unreliable for GCC < 4.9 +- help +- GCC's -Wmaybe-uninitialized is not reliable by definition. +- Lots of false positive warnings are produced in some cases. +- +- If this option is enabled, -Wno-maybe-uninitialzed is passed +- to the compiler to suppress maybe-uninitialized warnings. +- + config CONSTRUCTORS + bool + depends on !UML +@@ -1249,14 +1233,12 @@ config CC_OPTIMIZE_FOR_PERFORMANCE + config CC_OPTIMIZE_FOR_PERFORMANCE_O3 + bool "Optimize more for performance (-O3)" + depends on ARC +- imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives + help + Choosing this option will pass "-O3" to your compiler to optimize + the kernel yet more for performance. + + config CC_OPTIMIZE_FOR_SIZE + bool "Optimize for size (-Os)" +- imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives + help + Choosing this option will pass "-Os" to your compiler resulting + in a smaller kernel. +diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig +index 402eef84c859..743647005f64 100644 +--- a/kernel/trace/Kconfig ++++ b/kernel/trace/Kconfig +@@ -466,7 +466,6 @@ config PROFILE_ANNOTATED_BRANCHES + config PROFILE_ALL_BRANCHES + bool "Profile all if conditionals" if !FORTIFY_SOURCE + select TRACE_BRANCH_PROFILING +- imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives + help + This tracer profiles all branch conditions. Every if () + taken in the kernel is recorded whether it hit or miss. |