diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-12-11 15:34:27 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-01-24 20:59:17 +0100 |
| commit | db5adeaa84d0d70dabd41500e72493fec04408ac (patch) | |
| tree | 04cfa7125085524f3443fdebba2f911f4d6c9a62 | |
| parent | 673b0add9ea7f432f34c1c99eaa7c567012fc838 (diff) | |
build-sys: clean up flags included in the linker command line
Some of the CFLAGS that are discovered during configure, for example
compiler warnings, are being included on the linker command line because
QEMU_CFLAGS is added to it. Other flags, such as the -m32, appear twice
because they are included in both QEMU_CFLAGS and LDFLAGS. All this
leads to confusion with respect to what goes in which Makefile variables
(and we have plenty).
So, introduce QEMU_LDFLAGS for flags discovered by configure, following
the lead of QEMU_CFLAGS, and stop adding to it:
1) options that are already in CFLAGS, for example "-g"
2) duplicate options
At the same time, options that _are_ needed by both compiler and linker
must now be added to both QEMU_CFLAGS and QEMU_LDFLAGS, which is clearer.
This is mostly -fsanitize options. For now, --extra-cflags has this behavior
(but --extra-cxxflags does not).
Meson will not include CFLAGS on the linker command line, do the same in our
build system as well.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | .travis.yml | 2 | ||||
| -rw-r--r-- | Makefile | 4 | ||||
| -rwxr-xr-x | configure | 61 | ||||
| -rw-r--r-- | qga/vss-win32/Makefile.objs | 4 | ||||
| -rw-r--r-- | rules.mak | 4 |
5 files changed, 38 insertions, 37 deletions
diff --git a/.travis.yml b/.travis.yml index 6c1038a0f1..1ae645e9fc 100644 --- a/.travis.yml +++ b/.travis.yml @@ -327,7 +327,7 @@ matrix: - TEST_CMD="" before_script: - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR} - - ${SRC_DIR}/configure ${CONFIG} --extra-cflags="-g3 -O0 -Wno-error=stringop-truncation -fsanitize=thread -fuse-ld=gold" || { cat config.log && exit 1; } + - ${SRC_DIR}/configure ${CONFIG} --extra-cflags="-g3 -O0 -Wno-error=stringop-truncation -fsanitize=thread" --extra-ldflags="-fuse-ld=gold" || { cat config.log && exit 1; } # Run check-tcg against linux-user @@ -490,7 +490,7 @@ DTC_CPPFLAGS=-I$(BUILD_DIR)/dtc -I$(SRC_PATH)/dtc -I$(SRC_PATH)/dtc/libfdt .PHONY: dtc/all dtc/all: .git-submodule-status dtc/libfdt dtc/tests - $(call quiet-command,$(MAKE) $(DTC_MAKE_ARGS) CPPFLAGS="$(DTC_CPPFLAGS)" CFLAGS="$(DTC_CFLAGS)" LDFLAGS="$(LDFLAGS)" ARFLAGS="$(ARFLAGS)" CC="$(CC)" AR="$(AR)" LD="$(LD)" $(SUBDIR_MAKEFLAGS) libfdt/libfdt.a,) + $(call quiet-command,$(MAKE) $(DTC_MAKE_ARGS) CPPFLAGS="$(DTC_CPPFLAGS)" CFLAGS="$(DTC_CFLAGS)" LDFLAGS="$(QEMU_LDFLAGS)" ARFLAGS="$(ARFLAGS)" CC="$(CC)" AR="$(AR)" LD="$(LD)" $(SUBDIR_MAKEFLAGS) libfdt/libfdt.a,) dtc/%: .git-submodule-status @mkdir -p $@ @@ -517,7 +517,7 @@ slirp/all: .git-submodule-status BUILD_DIR="$(BUILD_DIR)/slirp" \ PKG_CONFIG="$(PKG_CONFIG)" \ CC="$(CC)" AR="$(AR)" LD="$(LD)" RANLIB="$(RANLIB)" \ - CFLAGS="$(QEMU_CFLAGS) $(CFLAGS)" LDFLAGS="$(LDFLAGS)") + CFLAGS="$(QEMU_CFLAGS) $(CFLAGS)" LDFLAGS="$(QEMU_LDFLAGS)") # Compatibility gunk to keep make working across the rename of targets # for recursion, to be removed some time after 4.1. @@ -126,7 +126,7 @@ compile_object() { compile_prog() { local_cflags="$1" local_ldflags="$2" - do_cc $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC $LDFLAGS $local_ldflags + do_cc $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC $QEMU_LDFLAGS $local_ldflags } # symbolically link $1 to $2. Portable version of "ln -sf". @@ -523,10 +523,11 @@ for opt do --cpu=*) cpu="$optarg" ;; --extra-cflags=*) QEMU_CFLAGS="$QEMU_CFLAGS $optarg" + QEMU_LDFLAGS="$QEMU_LDFLAGS $optarg" ;; --extra-cxxflags=*) QEMU_CXXFLAGS="$QEMU_CXXFLAGS $optarg" ;; - --extra-ldflags=*) LDFLAGS="$LDFLAGS $optarg" + --extra-ldflags=*) QEMU_LDFLAGS="$QEMU_LDFLAGS $optarg" EXTRA_LDFLAGS="$optarg" ;; --enable-debug-info) debug_info="yes" @@ -599,7 +600,6 @@ QEMU_INCLUDES="-iquote . -iquote \$(SRC_PATH) -iquote \$(SRC_PATH)/accel/tcg -iq QEMU_INCLUDES="$QEMU_INCLUDES -iquote \$(SRC_PATH)/disas/libvixl" if test "$debug_info" = "yes"; then CFLAGS="-g $CFLAGS" - LDFLAGS="-g $LDFLAGS" fi # running configure in the source tree? @@ -845,12 +845,12 @@ Darwin) LDFLAGS_SHARED="-bundle -undefined dynamic_lookup" if [ "$cpu" = "x86_64" ] ; then QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS" - LDFLAGS="-arch x86_64 $LDFLAGS" + QEMU_LDFLAGS="-arch x86_64 $QEMU_LDFLAGS" fi cocoa="yes" audio_drv_list="coreaudio try-sdl" audio_possible_drivers="coreaudio sdl" - LDFLAGS="-framework CoreFoundation -framework IOKit $LDFLAGS" + QEMU_LDFLAGS="-framework CoreFoundation -framework IOKit $QEMU_LDFLAGS" libs_softmmu="-F/System/Library/Frameworks -framework Cocoa -framework IOKit $libs_softmmu" # Disable attempts to use ObjectiveC features in os/object.h since they # won't work when we're compiling with gcc as a C compiler. @@ -1025,7 +1025,7 @@ for opt do ;; --static) static="yes" - LDFLAGS="-static $LDFLAGS" + QEMU_LDFLAGS="-static $QEMU_LDFLAGS" QEMU_PKG_CONFIG_FLAGS="--static $QEMU_PKG_CONFIG_FLAGS" ;; --mandir=*) mandir="$optarg" @@ -1551,42 +1551,42 @@ done case "$cpu" in ppc) CPU_CFLAGS="-m32" - LDFLAGS="-m32 $LDFLAGS" + QEMU_LDFLAGS="-m32 $QEMU_LDFLAGS" ;; ppc64) CPU_CFLAGS="-m64" - LDFLAGS="-m64 $LDFLAGS" + QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS" ;; sparc) CPU_CFLAGS="-m32 -mv8plus -mcpu=ultrasparc" - LDFLAGS="-m32 -mv8plus $LDFLAGS" + QEMU_LDFLAGS="-m32 -mv8plus $QEMU_LDFLAGS" ;; sparc64) CPU_CFLAGS="-m64 -mcpu=ultrasparc" - LDFLAGS="-m64 $LDFLAGS" + QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS" ;; s390) CPU_CFLAGS="-m31" - LDFLAGS="-m31 $LDFLAGS" + QEMU_LDFLAGS="-m31 $QEMU_LDFLAGS" ;; s390x) CPU_CFLAGS="-m64" - LDFLAGS="-m64 $LDFLAGS" + QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS" ;; i386) CPU_CFLAGS="-m32" - LDFLAGS="-m32 $LDFLAGS" + QEMU_LDFLAGS="-m32 $QEMU_LDFLAGS" ;; x86_64) # ??? Only extremely old AMD cpus do not have cmpxchg16b. # If we truly care, we should simply detect this case at # runtime and generate the fallback to serial emulation. CPU_CFLAGS="-m64 -mcx16" - LDFLAGS="-m64 $LDFLAGS" + QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS" ;; x32) CPU_CFLAGS="-mx32" - LDFLAGS="-mx32 $LDFLAGS" + QEMU_LDFLAGS="-mx32 $QEMU_LDFLAGS" ;; # No special flags required for other host CPUs esac @@ -1967,6 +1967,7 @@ EOF if do_cc $QEMU_CFLAGS -Werror $flag -c -o $TMPO $TMPC && compile_prog "-Werror $flag" ""; then QEMU_CFLAGS="$QEMU_CFLAGS $flag" + QEMU_LDFLAGS="$QEMU_LDFLAGS $flag" sp_on=1 break fi @@ -2051,10 +2052,10 @@ EOF if compile_prog "-fPIE -DPIE" "-pie"; then QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS" - LDFLAGS="-pie $LDFLAGS" + QEMU_LDFLAGS="-pie $QEMU_LDFLAGS" pie="yes" if compile_prog "" "-Wl,-z,relro -Wl,-z,now" ; then - LDFLAGS="-Wl,-z,relro -Wl,-z,now $LDFLAGS" + QEMU_LDFLAGS="-Wl,-z,relro -Wl,-z,now $QEMU_LDFLAGS" fi else if test "$pie" = "yes"; then @@ -5837,7 +5838,7 @@ EOF hvf='no' else hvf='yes' - LDFLAGS="-framework Hypervisor $LDFLAGS" + QEMU_LDFLAGS="-framework Hypervisor $QEMU_LDFLAGS" fi fi @@ -6071,8 +6072,8 @@ esac write_c_skeleton if test "$gcov" = "yes" ; then - CFLAGS="-fprofile-arcs -ftest-coverage -g $CFLAGS" - LDFLAGS="-fprofile-arcs -ftest-coverage $LDFLAGS" + QEMU_CFLAGS="-fprofile-arcs -ftest-coverage -g $QEMU_CFLAGS" + QEMU_LDFLAGS="-fprofile-arcs -ftest-coverage $QEMU_LDFLAGS" elif test "$fortify_source" = "yes" ; then CFLAGS="-O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 $CFLAGS" elif test "$debug" = "no"; then @@ -6080,7 +6081,8 @@ elif test "$debug" = "no"; then fi if test "$have_asan" = "yes"; then - CFLAGS="-fsanitize=address $CFLAGS" + QEMU_CFLAGS="-fsanitize=address $QEMU_CFLAGS" + QEMU_LDFLAGS="-fsanitize=address $QEMU_LDFLAGS" if test "$have_asan_iface_h" = "no" ; then echo "ASAN build enabled, but ASAN header missing." \ "Without code annotation, the report may be inferior." @@ -6090,7 +6092,8 @@ if test "$have_asan" = "yes"; then fi fi if test "$have_ubsan" = "yes"; then - CFLAGS="-fsanitize=undefined $CFLAGS" + QEMU_CFLAGS="-fsanitize=undefined $QEMU_CFLAGS" + QEMU_LDFLAGS="-fsanitize=undefined $QEMU_LDFLAGS" fi ########################################## @@ -6125,7 +6128,7 @@ fi if test "$solaris" = "no" ; then if $ld --version 2>/dev/null | grep "GNU ld" >/dev/null 2>/dev/null ; then - LDFLAGS="-Wl,--warn-common $LDFLAGS" + QEMU_LDFLAGS="-Wl,--warn-common $QEMU_LDFLAGS" fi fi @@ -6140,7 +6143,7 @@ fi if test "$mingw32" = "yes" ; then for flag in --dynamicbase --no-seh --nxcompat; do if ld_has $flag ; then - LDFLAGS="-Wl,$flag $LDFLAGS" + QEMU_LDFLAGS="-Wl,$flag $QEMU_LDFLAGS" fi done fi @@ -6375,7 +6378,7 @@ EOF update_cxxflags - if do_cxx $QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $LDFLAGS; then + if do_cxx $QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $QEMU_LDFLAGS; then # C++ compiler $cxx works ok with C compiler $cc : else @@ -6427,7 +6430,6 @@ echo "Objective-C compiler $objcc" echo "ARFLAGS $ARFLAGS" echo "CFLAGS $CFLAGS" echo "QEMU_CFLAGS $QEMU_CFLAGS" -echo "LDFLAGS $LDFLAGS" echo "QEMU_LDFLAGS $QEMU_LDFLAGS" echo "make $make" echo "install $install" @@ -7479,9 +7481,8 @@ if test "$sparse" = "yes" ; then echo "HOST_CC := REAL_CC=\"\$(HOST_CC)\" cgcc" >> $config_host_mak echo "QEMU_CFLAGS += -Wbitwise -Wno-transparent-union -Wno-old-initializer -Wno-non-pointer-null" >> $config_host_mak fi -echo "LDFLAGS=$LDFLAGS" >> $config_host_mak -echo "LDFLAGS_NOPIE=$LDFLAGS_NOPIE" >> $config_host_mak echo "QEMU_LDFLAGS=$QEMU_LDFLAGS" >> $config_host_mak +echo "LDFLAGS_NOPIE=$LDFLAGS_NOPIE" >> $config_host_mak echo "LD_REL_FLAGS=$LD_REL_FLAGS" >> $config_host_mak echo "LD_I386_EMULATION=$ld_i386_emulation" >> $config_host_mak echo "LIBS+=$LIBS" >> $config_host_mak @@ -7807,7 +7808,7 @@ if test "$target_bsd_user" = "yes" ; then fi -# generate QEMU_CFLAGS/LDFLAGS for targets +# generate QEMU_CFLAGS/QEMU_LDFLAGS for targets cflags="" ldflags="" @@ -7928,7 +7929,7 @@ if test "$TARGET_ARCH" = "s390x" && test "$target_softmmu" = "yes" && \ fi fi -echo "LDFLAGS+=$ldflags" >> $config_target_mak +echo "QEMU_LDFLAGS+=$ldflags" >> $config_target_mak echo "QEMU_CFLAGS+=$cflags" >> $config_target_mak done # for target in $targets diff --git a/qga/vss-win32/Makefile.objs b/qga/vss-win32/Makefile.objs index fd3ba1896b..c82676aeb8 100644 --- a/qga/vss-win32/Makefile.objs +++ b/qga/vss-win32/Makefile.objs @@ -5,9 +5,9 @@ qga-vss-dll-obj-y += requester.o provider.o install.o obj-qga-vss-dll-obj-y = $(addprefix $(obj)/, $(qga-vss-dll-obj-y)) $(obj-qga-vss-dll-obj-y): QEMU_CXXFLAGS := $(filter-out -fstack-protector-all -fstack-protector-strong, $(QEMU_CXXFLAGS)) -Wno-unknown-pragmas -Wno-delete-non-virtual-dtor -$(obj)/qga-vss.dll: LDFLAGS = -shared -Wl,--add-stdcall-alias,--enable-stdcall-fixup -lglib-2.0 -lole32 -loleaut32 -lshlwapi -luuid -lintl -lws2_32 -static +QGA_VSS_LDFLAGS = -shared -Wl,--add-stdcall-alias,--enable-stdcall-fixup -lglib-2.0 -lole32 -loleaut32 -lshlwapi -luuid -lintl -lws2_32 -static $(obj)/qga-vss.dll: $(obj-qga-vss-dll-obj-y) $(SRC_PATH)/$(obj)/qga-vss.def - $(call quiet-command,$(CXX) -o $@ $(qga-vss-dll-obj-y) $(SRC_PATH)/qga/vss-win32/qga-vss.def $(CXXFLAGS) $(LDFLAGS),"LINK","$(TARGET_DIR)$@") + $(call quiet-command,$(CXX) -o $@ $(qga-vss-dll-obj-y) $(SRC_PATH)/qga/vss-win32/qga-vss.def $(CXXFLAGS) $(QGA_VSS_LDFLAGS),"LINK","$(TARGET_DIR)$@") # rules to build qga-provider.tlb @@ -76,7 +76,7 @@ expand-objs = $(strip $(sort $(filter %.o,$1)) \ # must link with the C++ compiler, not the plain C compiler. LINKPROG = $(or $(CXX),$(CC)) -LINK = $(call quiet-command, $(LINKPROG) $(QEMU_LDFLAGS) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ +LINK = $(call quiet-command, $(LINKPROG) $(CFLAGS) $(QEMU_LDFLAGS) -o $@ \ $(call process-archive-undefs, $1) \ $(version-obj-y) $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@") @@ -105,7 +105,7 @@ LINK = $(call quiet-command, $(LINKPROG) $(QEMU_LDFLAGS) $(QEMU_CFLAGS) $(CFLAGS DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS) -%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED) +%$(DSOSUF): QEMU_LDFLAGS += $(LDFLAGS_SHARED) %$(DSOSUF): %.mo $(call LINK,$^) @# Copy to build root so modules can be loaded when program started without install |