>>> efivar 35 Extracting gzip -d -c /home/test/autobuild/run/instance-2/dl/efivar/efivar-35.tar.gz | /home/test/autobuild/run/instance-2/output/host/bin/tar --strip-components=1 -C /home/test/autobuild/run/instance-2/output/build/efivar-35 -xf - >>> efivar 35 Patching Applying 0001-Allow-build-with-uClibc.patch using patch: patching file src/export.c >>> efivar 35 Configuring >>> efivar 35 Building # makeguids is an internal host tool and must be built separately with # , otherwise it gets cross-built. PATH="/home/test/autobuild/run/instance-2/output/host/bin:/home/test/autobuild/run/instance-2/output/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" PKG_CONFIG="/home/test/autobuild/run/instance-2/output/host/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR="/" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_LIBDIR="/home/test/autobuild/run/instance-2/output/host/lib/pkgconfig:/home/test/autobuild/run/instance-2/output/host/share/pkgconfig" PATH="/home/test/autobuild/run/instance-2/output/host/bin:/home/test/autobuild/run/instance-2/output/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" PKG_CONFIG="/home/test/autobuild/run/instance-2/output/host/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR="/" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_LIBDIR="/home/test/autobuild/run/instance-2/output/host/lib/pkgconfig:/home/test/autobuild/run/instance-2/output/host/share/pkgconfig" AR="/usr/bin/ar" AS="/usr/bin/as" LD="/usr/bin/ld" NM="/usr/bin/nm" CC="/usr/bin/gcc" GCC="/usr/bin/gcc" CXX="/usr/bin/g++" CPP="/usr/bin/cpp" OBJCOPY="/usr/bin/objcopy" RANLIB="/usr/bin/ranlib" CPPFLAGS="-I/home/test/autobuild/run/instance-2/output/host/include" CFLAGS="-O2 -I/home/test/autobuild/run/instance-2/output/host/include" CXXFLAGS="-O2 -I/home/test/autobuild/run/instance-2/output/host/include" LDFLAGS="-L/home/test/autobuild/run/instance-2/output/host/lib -Wl,-rpath,/home/test/autobuild/run/instance-2/output/host/lib" INTLTOOL_PERL=/usr/bin/perl CFLAGS="-O2 -I/home/test/autobuild/run/instance-2/output/host/include -std=gnu99" /usr/bin/make -j4 -C /home/test/autobuild/run/instance-2/output/build/efivar-35/src gcc_cflags= makeguids make[1]: Entering directory `/home/test/autobuild/run/instance-2/output/build/efivar-35/src' cc -O2 -I/home/test/autobuild/run/instance-2/output/host/include -std=gnu99 -I/home/test/autobuild/run/instance-2/output/build/efivar-35/src/include/ -L. -L/home/test/autobuild/run/instance-2/output/host/lib -Wl,-rpath,/home/test/autobuild/run/instance-2/output/host/lib -Wl,-z,muldefs -I/home/test/autobuild/run/instance-2/output/host/include -DEFIVAR_BUILD_ENVIRONMENT -o makeguids makeguids.c guid.c -ldl In file included from makeguids.c:29:0: util.h: In function 'swizzle_guid_to_uuid': util.h:341:2: warning: implicit declaration of function '__builtin_bswap16' [-Wimplicit-function-declaration] In file included from guid.c:26:0: guid.h: In function 'text_to_guid': guid.h:135:2: warning: implicit declaration of function '__builtin_bswap16' [-Wimplicit-function-declaration] guid.c: In function 'efi_guid_to_str': guid.c:91:3: warning: implicit declaration of function 'asprintf' [-Wimplicit-function-declaration] /tmp/cc6jz0Op.o: In function `efi_str_to_guid': guid.c:(.text+0x341): undefined reference to `__builtin_bswap16' /tmp/cc6jz0Op.o: In function `efi_guid_to_str': guid.c:(.text+0x602): undefined reference to `__builtin_bswap16' guid.c:(.text+0x6ab): undefined reference to `__builtin_bswap16' guid.c:(.text+0x737): undefined reference to `__builtin_bswap16' /tmp/cc6jz0Op.o: In function `efi_guid_to_id_guid': guid.c:(.text+0x9df): undefined reference to `__builtin_bswap16' /tmp/cc6jz0Op.o:guid.c:(.text+0xa5b): more undefined references to `__builtin_bswap16' follow collect2: error: ld returned 1 exit status make[1]: *** [makeguids] Error 1 make[1]: Leaving directory `/home/test/autobuild/run/instance-2/output/build/efivar-35/src' make: *** [/home/test/autobuild/run/instance-2/output/build/efivar-35/.stamp_built] Error 2 make: Leaving directory `/home/test/autobuild/run/instance-2/buildroot'