lcd@lcd-VirtualBox:~/src/gecko$ ./mach build
 Config object not found by mach.
 0:00.33 Clobber not needed.
 0:00.34 Adding make options from None
    MOZ_OBJDIR=/home/lcd/src/gecko/obj-x86_64-pc-linux-gnu
    OBJDIR=/home/lcd/src/gecko/obj-x86_64-pc-linux-gnu
 0:00.34 /usr/bin/make -f client.mk -s configure
 0:00.36 cd /home/lcd/src/gecko/obj-x86_64-pc-linux-gnu
 0:00.36 /home/lcd/src/gecko/configure
 0:00.50 Re-executing in the virtualenv
 0:00.80 checking for vcs source checkout... git
 0:00.89 checking for a shell... /usr/bin/sh
 0:00.93 checking for host system type... x86_64-pc-linux-gnu
 0:00.93 checking for target system type... x86_64-pc-linux-gnu
 0:01.47 checking whether cross compiling... no
 0:01.63 checking for Python 3... /home/lcd/src/gecko/obj-x86_64-pc-linux-gnu/_virtualenvs/init_py3/bin/python (3.8.2)
 0:01.63 checking for git... /usr/bin/git
 0:01.64 checking for Git version... 2.25.1
 0:01.64 checking for sparse checkout... no
 0:01.65 checking for yasm... /usr/bin/yasm
 0:01.67 checking yasm version... 1.3.0
 0:01.67 checking for the target C compiler... /home/lcd/.mozbuild/clang/bin/clang
 0:01.84 checking whether the target C compiler can be used... yes
 0:01.84 checking the target C compiler version... 9.0.1
 0:01.91 checking the target C compiler works... yes
 0:01.91 checking for the target C++ compiler... /home/lcd/.mozbuild/clang/bin/clang++
 0:01.99 checking whether the target C++ compiler can be used... yes
 0:01.99 checking the target C++ compiler version... 9.0.1
 0:02.04 checking the target C++ compiler works... yes
 0:02.04 checking for the host C compiler... /home/lcd/.mozbuild/clang/bin/clang
 0:02.12 checking whether the host C compiler can be used... yes
 0:02.12 checking the host C compiler version... 9.0.1
 0:02.16 checking the host C compiler works... yes
 0:02.16 checking for the host C++ compiler... /home/lcd/.mozbuild/clang/bin/clang++
 0:02.24 checking whether the host C++ compiler can be used... yes
 0:02.24 checking the host C++ compiler version... 9.0.1
 0:02.29 checking the host C++ compiler works... yes
 0:02.34 checking for 64-bit OS... yes
 0:02.39 checking for new enough STL headers from libstdc++... yes
 0:02.39 checking for nasm... /home/lcd/.mozbuild/nasm/nasm
 0:02.40 checking nasm version... 2.14.02
 0:02.48 checking for linker... lld
 0:02.48 checking for the assembler... /home/lcd/.mozbuild/clang/bin/clang
 0:02.48 checking for ar... /usr/bin/ar
 0:02.48 checking for pkg_config... /usr/bin/pkg-config
 0:02.49 checking for pkg-config version... 0.29.1
 0:02.54 checking for stdint.h... yes
 0:02.60 checking for inttypes.h... yes
 0:02.64 checking for malloc.h... yes
 0:02.69 checking for alloca.h... yes
 0:02.74 checking for sys/byteorder.h... no
 0:02.80 checking for getopt.h... yes
 0:02.85 checking for unistd.h... yes
 0:02.90 checking for nl_types.h... yes
 0:02.94 checking for cpuid.h... yes
 0:03.00 checking for fts.h... yes
 0:03.05 checking for sys/statvfs.h... yes
 0:03.09 checking for sys/statfs.h... yes
 0:03.15 checking for sys/vfs.h... yes
 0:03.19 checking for sys/mount.h... yes
 0:03.26 checking for sys/quota.h... yes
 0:03.31 checking for linux/quota.h... yes
 0:03.36 checking for linux/if_addr.h... yes
 0:03.42 checking for linux/rtnetlink.h... yes
 0:03.46 checking for sys/queue.h... yes
 0:03.52 checking for sys/types.h... yes
 0:03.58 checking for netinet/in.h... yes
 0:03.63 checking for byteswap.h... yes
 0:03.68 checking for linux/perf_event.h... yes
 0:03.74 checking for perf_event_open system call... yes
 0:03.80 checking whether the C compiler supports -Wbitfield-enum-conversion... yes
 0:03.84 checking whether the C++ compiler supports -Wbitfield-enum-conversion... yes
 0:03.88 checking whether the C compiler supports -Wshadow-field-in-constructor-modified... yes
 0:03.92 checking whether the C++ compiler supports -Wshadow-field-in-constructor-modified... yes
 0:03.96 checking whether the C compiler supports -Wunreachable-code-return... yes
 0:04.02 checking whether the C++ compiler supports -Wunreachable-code-return... yes
 0:04.06 checking whether the C compiler supports -Wclass-varargs... yes
 0:04.10 checking whether the C++ compiler supports -Wclass-varargs... yes
 0:04.15 checking whether the C++ compiler supports -Wempty-init-stmt... yes
 0:04.18 checking whether the C compiler supports -Wfloat-overflow-conversion... yes
 0:04.24 checking whether the C++ compiler supports -Wfloat-overflow-conversion... yes
 0:04.32 checking whether the C compiler supports -Wfloat-zero-conversion... yes
 0:04.37 checking whether the C++ compiler supports -Wfloat-zero-conversion... yes
 0:04.42 checking whether the C compiler supports -Wloop-analysis... yes
 0:04.46 checking whether the C++ compiler supports -Wloop-analysis... yes
 0:04.51 checking whether the C++ compiler supports -Wc++2a-compat... yes
 0:04.56 checking whether the C++ compiler supports -Wcomma... yes
 0:04.60 checking whether the C compiler supports -Wduplicated-cond... no
 0:04.64 checking whether the C++ compiler supports -Wduplicated-cond... no
 0:04.71 checking whether the C++ compiler supports -Wimplicit-fallthrough... yes
 0:04.77 checking whether the C++ compiler supports -Wunused-function... yes
 0:04.83 checking whether the C++ compiler supports -Wunused-variable... yes
 0:04.87 checking whether the C compiler supports -Wstring-conversion... yes
 0:04.93 checking whether the C++ compiler supports -Wstring-conversion... yes
 0:04.97 checking whether the C compiler supports -Wtautological-overlap-compare... yes
 0:05.02 checking whether the C++ compiler supports -Wtautological-overlap-compare... yes
 0:05.08 checking whether the C compiler supports -Wtautological-unsigned-enum-zero-compare... yes
 0:05.13 checking whether the C++ compiler supports -Wtautological-unsigned-enum-zero-compare... yes
 0:05.17 checking whether the C compiler supports -Wtautological-unsigned-zero-compare... yes
 0:05.22 checking whether the C++ compiler supports -Wtautological-unsigned-zero-compare... yes
 0:05.26 checking whether the C compiler supports -Wno-error=tautological-type-limit-compare... yes
 0:05.31 checking whether the C++ compiler supports -Wno-error=tautological-type-limit-compare... yes
 0:05.37 checking whether the C++ compiler supports -Wno-inline-new-delete... yes
 0:05.42 checking whether the C compiler supports -Wno-error=maybe-uninitialized... no
 0:05.46 checking whether the C++ compiler supports -Wno-error=maybe-uninitialized... no
 0:05.51 checking whether the C compiler supports -Wno-error=deprecated-declarations... yes
 0:05.56 checking whether the C++ compiler supports -Wno-error=deprecated-declarations... yes
 0:05.62 checking whether the C compiler supports -Wno-error=array-bounds... yes
 0:05.68 checking whether the C++ compiler supports -Wno-error=array-bounds... yes
 0:05.73 checking whether the C compiler supports -Wno-error=coverage-mismatch... no
 0:05.78 checking whether the C++ compiler supports -Wno-error=coverage-mismatch... no
 0:05.84 checking whether the C compiler supports -Wno-error=backend-plugin... yes
 0:05.90 checking whether the C++ compiler supports -Wno-error=backend-plugin... yes
 0:05.95 checking whether the C compiler supports -Wno-error=free-nonheap-object... no
 0:05.99 checking whether the C++ compiler supports -Wno-error=free-nonheap-object... no
 0:06.05 checking whether the C compiler supports -Wno-multistatement-macros... no
 0:06.09 checking whether the C++ compiler supports -Wno-multistatement-macros... no
 0:06.13 checking whether the C compiler supports -Wno-error=return-std-move... yes
 0:06.18 checking whether the C++ compiler supports -Wno-error=return-std-move... yes
 0:06.22 checking whether the C compiler supports -Wno-error=class-memaccess... no
 0:06.27 checking whether the C++ compiler supports -Wno-error=class-memaccess... no
 0:06.32 checking whether the C compiler supports -Wno-error=atomic-alignment... yes
 0:06.38 checking whether the C++ compiler supports -Wno-error=atomic-alignment... yes
 0:06.41 checking whether the C compiler supports -Wno-error=deprecated-copy... no
 0:06.45 checking whether the C++ compiler supports -Wno-error=deprecated-copy... no
 0:06.52 checking whether the C compiler supports -Wformat... yes
 0:06.56 checking whether the C++ compiler supports -Wformat... yes
 0:06.61 checking whether the C compiler supports -Wformat-security... yes
 0:06.68 checking whether the C++ compiler supports -Wformat-security... yes
 0:06.72 checking whether the C compiler supports -Wformat-overflow=2... no
 0:06.78 checking whether the C++ compiler supports -Wformat-overflow=2... no
 0:06.84 checking whether the C compiler supports -Wno-gnu-zero-variadic-macro-arguments... yes
 0:06.88 checking whether the C++ compiler supports -Wno-gnu-zero-variadic-macro-arguments... yes
 0:06.93 checking whether the C compiler supports -Werror=implicit-function-declaration... yes
 0:06.98 checking whether the C++ compiler supports -Werror=implicit-function-declaration... yes
 0:06.98 checking for llvm_profdata... /home/lcd/.mozbuild/clang/bin/llvm-profdata
 0:07.04 checking whether the C++ compiler supports -fno-sized-deallocation... yes
 0:07.09 checking whether the C++ compiler supports -fno-aligned-new... yes
 0:07.11 checking for libpulse... yes
 0:07.11 checking MOZ_PULSEAUDIO_CFLAGS... -D_REENTRANT
 0:07.13 checking MOZ_PULSEAUDIO_LIBS... -lpulse
 0:07.13 checking for rustc... /home/lcd/.cargo/bin/rustc
 0:07.13 checking for cargo... /home/lcd/.cargo/bin/cargo
 0:07.17 Actually using '/home/lcd/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc'
 0:07.21 Actually using '/home/lcd/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo'
 0:07.23 checking rustc version... 1.45.0
 0:07.26 checking cargo version... 1.45.0
 0:07.40 checking for rust target triplet... x86_64-unknown-linux-gnu
 0:07.50 checking for rust host triplet... x86_64-unknown-linux-gnu
 0:07.50 checking for rustdoc... /home/lcd/.cargo/bin/rustdoc
 0:07.51 checking for cbindgen... /home/lcd/.mozbuild/cbindgen/cbindgen
 0:07.51 checking for rustfmt... /home/lcd/.cargo/bin/rustfmt
 0:07.51 checking for clang for bindgen... /home/lcd/.mozbuild/clang/bin/clang++
 0:07.53 checking for libclang for bindgen... /home/lcd/.mozbuild/clang/lib/libclang.so
 0:07.56 checking that libclang is new enough... yes
 0:07.56 checking bindgen cflags... -x c++ -fno-sized-deallocation -fno-aligned-new -DTRACING=1 -DIMPL_LIBXUL -DMOZILLA_INTERNAL_API -DRUST_BINDGEN -DOS_POSIX=1 -DOS_LINUX=1 -std=gnu++17
 0:07.64 checking for nodejs... /home/lcd/.mozbuild/node/bin/node (10.21.0)
 0:07.64 checking for gtk+-wayland-3.0 >= 3.14 xkbcommon >= 0.4.1 libdrm >= 2.4... yes
 0:07.67 checking MOZ_WAYLAND_CFLAGS... -pthread -I/usr/include/gtk-3.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/gtk-3.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libdrm
 0:07.68 checking MOZ_WAYLAND_LIBS... -lgtk-3 -lgdk-3 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -latk-1.0 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lxkbcommon -ldrm
 0:07.70 checking for pango >= 1.22.0 pangoft2 >= 1.22.0 pangocairo >= 1.22.0... yes
 0:07.71 checking MOZ_PANGO_CFLAGS... -I/usr/include/pango-1.0 -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16
 0:07.74 checking MOZ_PANGO_LIBS... -lpangoft2-1.0 -lfontconfig -lfreetype -lpangocairo-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lharfbuzz -lcairo
 0:07.74 checking for fontconfig >= 2.7.0... yes
 0:07.77 checking _FONTCONFIG_CFLAGS... -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16
 0:07.78 checking _FONTCONFIG_LIBS... -lfontconfig -lfreetype
 0:07.78 checking for freetype2 >= 6.1.0... yes
 0:07.80 checking _FT2_CFLAGS... -I/usr/include/freetype2 -I/usr/include/libpng16
 0:07.81 checking _FT2_LIBS... -lfreetype
 0:07.81 checking for tar... /usr/bin/tar
 0:07.81 checking for unzip... /usr/bin/unzip
 0:07.81 checking for zip... /usr/bin/zip
 0:07.82 checking for gn... not found
 0:07.82 checking for the Mozilla API key... no
 0:07.82 checking for the Google Location Service API key... no
 0:07.82 checking for the Google Safebrowsing API key... no
 0:07.82 checking for the Bing API key... no
 0:07.83 checking for the Adjust SDK key... no
 0:07.83 checking for the Leanplum SDK key... no
 0:07.83 checking for the Pocket API key... no
 0:07.85 checking for dump_syms... /home/lcd/.mozbuild/dump_syms/dump_syms
 0:07.94 checking for getcontext... yes
 0:07.94 checking for awk... /usr/bin/mawk
 0:07.94 checking for perl... /usr/bin/perl
 0:07.95 checking for minimum required perl version >= 5.006... 5.030000
 0:07.98 checking for full perl installation... yes
 0:07.99 checking for gmake... /usr/bin/make
 0:07.99 checking for watchman... not found
 0:07.99 checking for xargs... /usr/bin/xargs
 0:07.99 checking for rpmbuild... not found
 0:07.99 checking for NSIS version... no
 0:08.03 checking for llvm-objdump... /home/lcd/.mozbuild/clang/bin/llvm-objdump
 0:08.03 checking for autoconf...
 0:08.03 ERROR: Could not find autoconf 2.13
 0:08.11 *** Fix above errors and then restart with\
 0:08.11                "./mach build"
 0:08.11 make: *** [client.mk:115: configure] Error 1
lcd@lcd-VirtualBox:~/src/gecko$