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Thu, 18 May 2023 04:40:28 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5lkOpkvPXrfHuYh7wt91PZa9gv30ItB+9IJ+0hd12kpfpAGzuV3avFlY+STURoLMpb7Uia2g== X-Received: by 2002:a17:907:1c23:b0:966:2984:3da0 with SMTP id nc35-20020a1709071c2300b0096629843da0mr40958085ejc.63.1684410028027; Thu, 18 May 2023 04:40:28 -0700 (PDT) Received: from [192.168.10.118] ([2001:b07:6468:f312:1c09:f536:3de6:228c]) by smtp.gmail.com with ESMTPSA id jo8-20020a170906f6c800b00969f44bbef3sm886693ejb.11.2023.05.18.04.40.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 May 2023 04:40:27 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PULL 59/68] build: move warning flag selection to meson Date: Thu, 18 May 2023 13:40:25 +0200 Message-Id: <20230518114025.1006732-2-pbonzini@redhat.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230518114025.1006732-1-pbonzini@redhat.com> References: <20230518114025.1006732-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Meson already knows to test with the positive form of the flag, which simplifies the test. Warnings are now tested explicitly for the C++ compiler, instead of hardcoding those that are only available for the C language. At this point all compiler flags in QEMU_CFLAGS are global and only depend on the OS. No feature tests are performed in configure. Reviewed-by: Marc-André Lureau Signed-off-by: Paolo Bonzini --- v2->v3: actually add qemu_cflags for C, not ObjC configure | 86 ---------------------------------------- contrib/plugins/Makefile | 3 +- meson.build | 68 +++++++++++++++++++++---------- 3 files changed, 48 insertions(+), 109 deletions(-) diff --git a/configure b/configure index e215b60ce78f..cb42749d25c1 100755 --- a/configure +++ b/configure @@ -79,7 +79,6 @@ fi TMPB="qemu-conf" TMPC="${TMPDIR1}/${TMPB}.c" TMPO="${TMPDIR1}/${TMPB}.o" -TMPM="${TMPDIR1}/${TMPB}.m" TMPE="${TMPDIR1}/${TMPB}.exe" rm -f config.log @@ -162,15 +161,6 @@ do_cc() { do_compiler_werror "$cc" $CPU_CFLAGS "$@" } -do_objc() { - do_compiler_werror "$objcc" $CPU_CFLAGS "$@" -} - -# Append $2 to the variable named $1, with space separation -add_to() { - eval $1=\${$1:+\"\$$1 \"}\$2 -} - compile_object() { local_cflags="$1" do_cc $CFLAGS $EXTRA_CFLAGS $CONFIGURE_CFLAGS $QEMU_CFLAGS $local_cflags -c -o $TMPO $TMPC @@ -1186,81 +1176,6 @@ if ! compile_prog "" "" ; then error_exit "You need at least GCC v7.4 or Clang v10.0 (or XCode Clang v12.0)" fi -# Accumulate -Wfoo and -Wno-bar separately. -# We will list all of the enable flags first, and the disable flags second. -# Note that we do not add -Werror, because that would enable it for all -# configure tests. If a configure test failed due to -Werror this would -# just silently disable some features, so it's too error prone. - -warn_flags= -add_to warn_flags -Wundef -add_to warn_flags -Wwrite-strings -add_to warn_flags -Wmissing-prototypes -add_to warn_flags -Wstrict-prototypes -add_to warn_flags -Wredundant-decls -add_to warn_flags -Wold-style-declaration -add_to warn_flags -Wold-style-definition -add_to warn_flags -Wtype-limits -add_to warn_flags -Wformat-security -add_to warn_flags -Wformat-y2k -add_to warn_flags -Winit-self -add_to warn_flags -Wignored-qualifiers -add_to warn_flags -Wempty-body -add_to warn_flags -Wnested-externs -add_to warn_flags -Wendif-labels -add_to warn_flags -Wexpansion-to-defined -add_to warn_flags -Wimplicit-fallthrough=2 -add_to warn_flags -Wmissing-format-attribute - -if test "$targetos" != "darwin"; then - add_to warn_flags -Wthread-safety -fi - -nowarn_flags= -add_to nowarn_flags -Wno-initializer-overrides -add_to nowarn_flags -Wno-missing-include-dirs -add_to nowarn_flags -Wno-shift-negative-value -add_to nowarn_flags -Wno-string-plus-int -add_to nowarn_flags -Wno-typedef-redefinition -add_to nowarn_flags -Wno-tautological-type-limit-compare -add_to nowarn_flags -Wno-psabi -add_to nowarn_flags -Wno-gnu-variable-sized-type-not-at-end - -gcc_flags="$warn_flags $nowarn_flags" - -cc_has_warning_flag() { - write_c_skeleton; - - # Use the positive sense of the flag when testing for -Wno-wombat - # support (gcc will happily accept the -Wno- form of unknown - # warning options). - optflag="$(echo $1 | sed -e 's/^-Wno-/-W/')" - compile_prog "-Werror $optflag" "" -} - -objcc_has_warning_flag() { - cat > $TMPM <> $config_host_mak echo "PKG_CONFIG=${pkg_config}" >> $config_host_mak echo "CC=$cc" >> $config_host_mak echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak -echo "QEMU_OBJCFLAGS=$QEMU_OBJCFLAGS" >> $config_host_mak echo "EXESUF=$EXESUF" >> $config_host_mak # use included Linux headers diff --git a/contrib/plugins/Makefile b/contrib/plugins/Makefile index 8a316cd76f2f..b2b9db9f51af 100644 --- a/contrib/plugins/Makefile +++ b/contrib/plugins/Makefile @@ -27,8 +27,7 @@ SONAMES := $(addsuffix .so,$(addprefix lib,$(NAMES))) # The main QEMU uses Glib extensively so it's perfectly fine to use it # in plugins (which many example do). CFLAGS := $(shell $(PKG_CONFIG) --cflags glib-2.0) -CFLAGS += -fPIC -Wall $(filter -W%, $(QEMU_CFLAGS)) -CFLAGS += $(if $(findstring no-psabi,$(QEMU_CFLAGS)),-Wpsabi) +CFLAGS += -fPIC -Wall CFLAGS += $(if $(CONFIG_DEBUG_TCG), -ggdb -O0) CFLAGS += -I$(SRC_PATH)/include/qemu diff --git a/meson.build b/meson.build index 252082c142de..515e31973ada 100644 --- a/meson.build +++ b/meson.build @@ -190,16 +190,8 @@ endif # Compiler flags # ################## -qemu_common_flags = [] +qemu_common_flags = config_host['QEMU_CFLAGS'].split() qemu_cflags = [] -foreach arg : config_host['QEMU_CFLAGS'].split() - if arg.startswith('-W') - qemu_cflags += arg - else - qemu_common_flags += arg - endif -endforeach -qemu_objcflags = config_host['QEMU_OBJCFLAGS'].split() qemu_ldflags = [] if get_option('gprof') @@ -369,20 +361,47 @@ endif add_global_arguments(qemu_common_flags, native: false, language: all_languages) add_global_link_arguments(qemu_ldflags, native: false, language: all_languages) +# Collect warnings that we want to enable + +warn_flags = [ + '-Wundef', + '-Wwrite-strings', + '-Wmissing-prototypes', + '-Wstrict-prototypes', + '-Wredundant-decls', + '-Wold-style-declaration', + '-Wold-style-definition', + '-Wtype-limits', + '-Wformat-security', + '-Wformat-y2k', + '-Winit-self', + '-Wignored-qualifiers', + '-Wempty-body', + '-Wnested-externs', + '-Wendif-labels', + '-Wexpansion-to-defined', + '-Wimplicit-fallthrough=2', + '-Wmissing-format-attribute', + '-Wno-initializer-overrides', + '-Wno-missing-include-dirs', + '-Wno-shift-negative-value', + '-Wno-string-plus-int', + '-Wno-typedef-redefinition', + '-Wno-tautological-type-limit-compare', + '-Wno-psabi', + '-Wno-gnu-variable-sized-type-not-at-end', +] + +if targetos != 'darwin' + warn_flags += ['-Wthread-safety'] +endif + # Check that the C++ compiler exists and works with the C compiler. link_language = 'c' linker = cc qemu_cxxflags = [] if 'cpp' in all_languages - add_global_arguments(['-D__STDC_LIMIT_MACROS', '-D__STDC_CONSTANT_MACROS', '-D__STDC_FORMAT_MACROS'], - native: false, language: 'cpp') - foreach k: qemu_cflags - if k not in ['-Wstrict-prototypes', '-Wmissing-prototypes', '-Wnested-externs', - '-Wold-style-declaration', '-Wold-style-definition', '-Wredundant-decls'] - qemu_cxxflags += [k] - endif - endforeach - + qemu_cxxflags = ['-D__STDC_LIMIT_MACROS', '-D__STDC_CONSTANT_MACROS', '-D__STDC_FORMAT_MACROS'] + qemu_cflags if cxx.links(files('scripts/main.c'), args: qemu_cflags) link_language = 'cpp' linker = cxx @@ -403,8 +422,15 @@ if get_option('optimization') != '0' and targetos == 'linux' endif add_project_arguments(qemu_cflags, native: false, language: 'c') -add_project_arguments(qemu_cxxflags, native: false, language: 'cpp') -add_project_arguments(qemu_objcflags, native: false, language: 'objc') +add_project_arguments(cc.get_supported_arguments(warn_flags), native: false, language: 'c') +if 'cpp' in all_languages + add_project_arguments(qemu_cxxflags, native: false, language: 'cpp') + add_project_arguments(cxx.get_supported_arguments(warn_flags), native: false, language: 'cpp') +endif +if 'objc' in all_languages + # Note sanitizer flags are not applied to Objective-C sources! + add_project_arguments(objc.get_supported_arguments(warn_flags), native: false, language: 'objc') +endif if targetos == 'linux' add_project_arguments('-isystem', meson.current_source_dir() / 'linux-headers', '-isystem', 'linux-headers', @@ -4007,7 +4033,7 @@ if 'cpp' in all_languages summary_info += {'QEMU_CXXFLAGS': ' '.join(qemu_common_flags + qemu_cxxflags)} endif if 'objc' in all_languages - summary_info += {'QEMU_OBJCFLAGS': ' '.join(qemu_common_flags + qemu_objcflags)} + summary_info += {'QEMU_OBJCFLAGS': ' '.join(qemu_common_flags)} endif summary_info += {'QEMU_LDFLAGS': ' '.join(qemu_ldflags)} summary_info += {'profiler': get_option('profiler')} -- 2.40.1