diff options
Diffstat (limited to 'security/nss/coreconf/Werror.mk')
| -rw-r--r-- | security/nss/coreconf/Werror.mk | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/security/nss/coreconf/Werror.mk b/security/nss/coreconf/Werror.mk new file mode 100644 index 0000000000..a569a497ce --- /dev/null +++ b/security/nss/coreconf/Werror.mk @@ -0,0 +1,107 @@ +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# This sets WARNING_CFLAGS for gcc-like compilers. + +ifndef CC_IS_CLANG + CC_IS_CLANG := $(and $(findstring clang, $(shell $(CC) --version 2>&1)), 1) + # Export CC_IS_CLANG to save a shell invocation when recursing. + export CC_IS_CLANG +endif + +ifdef CC_IS_CLANG + # Clang claims GCC 4.2.1 compatibility, see GCC_VERSION + CC_IS_GCC = 1 + # Export CC_IS_GCC to save a shell invocation when recursing. + export CC_IS_GCC +endif + +ifndef CC_IS_GCC + CC_IS_GCC := $(shell $(CC) -x c -E -Wall -Werror /dev/null >/dev/null 2>&1 && echo 1) + # Export CC_IS_GCC to save a shell invocation when recursing. + export CC_IS_GCC +endif + +ifndef CC_NAME + ifeq (1,$(CC_IS_GCC)) + CC_NAME := $(shell $(CC) -? 2>&1 >/dev/null | sed -e 's/:.*//;1q') + else + CC_NAME := $(notdir $(CC)) + endif + # Export CC_NAME to save a shell invocation when recursing. + export CC_NAME +endif + +ifndef GCC_VERSION + ifeq (1,$(CC_IS_GCC)) + GCC_VERSION := $(subst ., ,$(shell $(CC) -dumpversion || echo x.x.x)) + # Export GCC_VERSION to save a shell invocation when recursing. + export GCC_VERSION + endif +endif + +ifndef WARNING_CFLAGS + ifneq (1,$(CC_IS_GCC)) + WARNING_CFLAGS = $(NULL) + else + # This tests to see if enabling the warning is possible before + # setting an option to disable it. + set_warning = $(shell $(CC) -x c -E -Werror -W$(1) /dev/null >/dev/null 2>&1 && echo -W$(2)$(1)) + enable_warning = $(call set_warning,$(1),) + disable_warning = $(call set_warning,$(1),no-) + + WARNING_CFLAGS = -Wall $(call enable_warning,shadow) + ifdef CC_IS_CLANG + # -Qunused-arguments : clang objects to arguments that it doesn't understand + # and fixing this would require rearchitecture + WARNING_CFLAGS += -Qunused-arguments + # -Wno-parentheses-equality : because clang warns about macro expansions + WARNING_CFLAGS += $(call disable_warning,parentheses-equality) + ifdef BUILD_OPT + # clang is unable to handle glib's expansion of strcmp and similar for optimized + # builds, so ignore the resulting errors. + # See https://llvm.org/bugs/show_bug.cgi?id=20144 + WARNING_CFLAGS += $(call disable_warning,array-bounds) + WARNING_CFLAGS += $(call disable_warning,unevaluated-expression) + endif + endif # if clang + + ifndef NSS_ENABLE_WERROR + ifeq ($(OS_TARGET),Android) + # Android lollipop generates the following warning: + # error: call to 'sprintf' declared with attribute warning: + # sprintf is often misused; please use snprintf [-Werror] + # So, just suppress -Werror entirely on Android + NSS_ENABLE_WERROR = 0 + $(warning OS_TARGET is Android, disabling -Werror) + else + ifdef CC_IS_CLANG + # Clang reports its version as an older gcc, but it's OK + NSS_ENABLE_WERROR = 1 + else + ifneq (,$(filter 4.8 4.9,$(word 1,$(GCC_VERSION)).$(word 2,$(GCC_VERSION)))) + NSS_ENABLE_WERROR = 1 + endif + ifeq (,$(filter 0 1 2 3 4,$(word 1,$(GCC_VERSION)))) + NSS_ENABLE_WERROR = 1 + endif + endif + ifndef NSS_ENABLE_WERROR + $(warning Unable to find gcc 4.8 or greater, disabling -Werror) + NSS_ENABLE_WERROR = 0 + endif + endif + endif #ndef NSS_ENABLE_WERROR + + ifeq ($(NSS_ENABLE_WERROR),1) + WARNING_CFLAGS += -Werror + else + # Old versions of gcc (< 4.8) don't support #pragma diagnostic in functions. + # Use this to disable use of that #pragma and the warnings it suppresses. + WARNING_CFLAGS += -DNSS_NO_GCC48 + endif + endif + export WARNING_CFLAGS +endif # ndef WARNING_CFLAGS |