From: Paolo Bonzini Date: Wed, 23 Sep 2020 09:26:15 +0000 (-0400) Subject: configure: do not clobber environment CFLAGS/CXXFLAGS/LDFLAGS X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=5770e8afd629cc8a83dc41e2524258c73c1b301e;p=qmiga%2Fqemu.git configure: do not clobber environment CFLAGS/CXXFLAGS/LDFLAGS If the CFLAGS, CXXFLAGS or LDFLAGS variables are present in the environment, any modification made within the configure script is passed down to Meson. This is particularly undesirable for the "-pie" option, since it overrides "-shared" and thus messes up the linker flags for shared modules. Using a separate variable therefore fixes the bug, while clarifying that the scope of these CFLAGS is just the configure script. We also do not need to pass those variables in config-host.mak; they were only used for printing the summary now that all submodules are built with handwritten Meson rules). For now synthesize CFLAGS in the configuration summary, the next patch will also pass them in a cleaner way using the cross file. Reported-by: Frederic Bezies Analyzed-by: Toolybird Tested-by: Richard Henderson Reviewed-by: Richard Henderson Signed-off-by: Paolo Bonzini Message-Id: <20200923092617.1593722-4-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini --- diff --git a/configure b/configure index 2fdb4339e8..1b173276ea 100755 --- a/configure +++ b/configure @@ -155,7 +155,7 @@ update_cxxflags() { # options which some versions of GCC's C++ compiler complain about # because they only make sense for C programs. QEMU_CXXFLAGS="$QEMU_CXXFLAGS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS" - CXXFLAGS=$(echo "$CFLAGS" | sed s/-std=gnu99/-std=gnu++11/) + CONFIGURE_CXXFLAGS=$(echo "$CONFIGURE_CFLAGS" | sed s/-std=gnu99/-std=gnu++11/) for arg in $QEMU_CFLAGS; do case $arg in -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\ @@ -170,13 +170,14 @@ update_cxxflags() { compile_object() { local_cflags="$1" - do_cc $CFLAGS $QEMU_CFLAGS $local_cflags -c -o $TMPO $TMPC + do_cc $CFLAGS $CONFIGURE_CFLAGS $QEMU_CFLAGS $local_cflags -c -o $TMPO $TMPC } compile_prog() { local_cflags="$1" local_ldflags="$2" - do_cc $CFLAGS $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC $LDFLAGS $QEMU_LDFLAGS $local_ldflags + do_cc $CFLAGS $CONFIGURE_CFLAGS $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC \ + $LDFLAGS $CONFIGURE_LDFLAGS $QEMU_LDFLAGS $local_ldflags } # symbolically link $1 to $2. Portable version of "ln -sf". @@ -537,7 +538,10 @@ QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS" QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS" QEMU_INCLUDES="-iquote . -iquote ${source_path} -iquote ${source_path}/accel/tcg -iquote ${source_path}/include" QEMU_INCLUDES="$QEMU_INCLUDES -iquote ${source_path}/disas/libvixl" -CFLAGS="-std=gnu99 -Wall" + +# Flags that are needed during configure but later taken care of by Meson +CONFIGURE_CFLAGS="-std=gnu99 -Wall" +CONFIGURE_LDFLAGS= check_define() { @@ -851,7 +855,7 @@ if test "$mingw32" = "yes" ; then EXESUF=".exe" HOST_DSOSUF=".dll" # MinGW needs -mthreads for TLS and macro _MT. - CFLAGS="-mthreads $CFLAGS" + CONFIGURE_CFLAGS="-mthreads $CONFIGURE_CFLAGS" write_c_skeleton; prefix="/qemu" qemu_suffix="" @@ -2109,7 +2113,7 @@ fi if test "$static" = "yes"; then if test "$pie" != "no" && compile_prog "-Werror -fPIE -DPIE" "-static-pie"; then - CFLAGS="-fPIE -DPIE $CFLAGS" + CONFIGURE_CFLAGS="-fPIE -DPIE $CONFIGURE_CFLAGS" QEMU_LDFLAGS="-static-pie $QEMU_LDFLAGS" pie="yes" elif test "$pie" = "yes"; then @@ -2119,11 +2123,11 @@ if test "$static" = "yes"; then pie="no" fi elif test "$pie" = "no"; then - CFLAGS="$CFLAGS_NOPIE $CFLAGS" - LDFLAGS="$LDFLAGS_NOPIE $LDFLAGS" + CONFIGURE_CFLAGS="$CFLAGS_NOPIE $CONFIGURE_CFLAGS" + CONFIGURE_LDFLAGS="$LDFLAGS_NOPIE $CONFIGURE_LDFLAGS" elif compile_prog "-Werror -fPIE -DPIE" "-pie"; then - CFLAGS="-fPIE -DPIE $CFLAGS" - LDFLAGS="-pie $LDFLAGS" + CONFIGURE_CFLAGS="-fPIE -DPIE $CONFIGURE_CFLAGS" + CONFIGURE_LDFLAGS="-pie $CONFIGURE_LDFLAGS" pie="yes" elif test "$pie" = "yes"; then error_exit "PIE not available due to missing toolchain support" @@ -3667,7 +3671,7 @@ EOF if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then if cc_has_warning_flag "-Wno-unknown-attributes"; then glib_cflags="-Wno-unknown-attributes $glib_cflags" - CFLAGS="-Wno-unknown-attributes $CFLAGS" + CONFIGURE_CFLAGS="-Wno-unknown-attributes $CONFIGURE_CFLAGS" fi fi @@ -3687,7 +3691,7 @@ EOF if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then if cc_has_warning_flag "-Wno-unused-function"; then glib_cflags="$glib_cflags -Wno-unused-function" - CFLAGS="$CFLAGS -Wno-unused-function" + CONFIGURE_CFLAGS="$CONFIGURE_CFLAGS -Wno-unused-function" fi fi @@ -5814,13 +5818,6 @@ elif test "$fortify_source" = "yes" ; then QEMU_CFLAGS="-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 $QEMU_CFLAGS" debug=no fi -if test "$debug_info" = "yes"; then - CFLAGS="-g $CFLAGS" - LDFLAGS="-g $LDFLAGS" -fi -if test "$debug" = "no"; then - CFLAGS="-O2 $CFLAGS" -fi case "$ARCH" in alpha) @@ -6043,7 +6040,7 @@ EOF update_cxxflags - if do_cxx $CXXFLAGS $QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $QEMU_LDFLAGS; then + if do_cxx $CXXFLAGS $CONFIGURE_CXXFLAGS $QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $QEMU_LDFLAGS; then # C++ compiler $cxx works ok with C compiler $cc : else @@ -6953,7 +6950,6 @@ echo "RANLIB=$ranlib" >> $config_host_mak echo "NM=$nm" >> $config_host_mak echo "PKG_CONFIG=$pkg_config_exe" >> $config_host_mak echo "WINDRES=$windres" >> $config_host_mak -echo "CFLAGS=$CFLAGS" >> $config_host_mak echo "CFLAGS_NOPIE=$CFLAGS_NOPIE" >> $config_host_mak echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak echo "QEMU_CXXFLAGS=$QEMU_CXXFLAGS" >> $config_host_mak diff --git a/meson.build b/meson.build index 0b8ec210f0..8904f7d79b 100644 --- a/meson.build +++ b/meson.build @@ -1771,7 +1771,8 @@ if targetos == 'darwin' summary_info += {'Objective-C compiler': meson.get_compiler('objc').cmd_array()[0]} endif summary_info += {'ARFLAGS': config_host['ARFLAGS']} -summary_info += {'CFLAGS': config_host['CFLAGS']} +summary_info += {'CFLAGS': '-O' + get_option('optimization') + + (get_option('debug') ? ' -g' : '')} summary_info += {'QEMU_CFLAGS': config_host['QEMU_CFLAGS']} summary_info += {'QEMU_LDFLAGS': config_host['QEMU_LDFLAGS']} summary_info += {'make': config_host['MAKE']}